U.S. patent application number 10/772547 was filed with the patent office on 2004-08-12 for spray dispenser.
This patent application is currently assigned to GOTIT LTD.. Invention is credited to Yahav, Shimon.
Application Number | 20040155056 10/772547 |
Document ID | / |
Family ID | 11073750 |
Filed Date | 2004-08-12 |
United States Patent
Application |
20040155056 |
Kind Code |
A1 |
Yahav, Shimon |
August 12, 2004 |
Spray dispenser
Abstract
A spring biasing element for causing a temperature responsive
shifting element mounted on a plunger to shift at a selected
temperature, or at a selected time interval, so as to
intermittently spray fluid from a dispenser attachable to a
container containing a fluid, the dispenser being ringlessly
attachable to the container adjacent the cover of the container
valve and includes an actuator operative the fluid to be released
from the container into the dispenser, and an intermittent
dispensing assembly that provides an intermittent fluid output, the
intermittent dispensing assembly including a temperature responsive
shifting element, the temperature responsive shifting element being
shiftable in response to temperature changes in the dispenser and
being generally freely supported around a perimeter thereof in the
dispenser.
Inventors: |
Yahav, Shimon; (Rehovot,
IL) |
Correspondence
Address: |
Ladas & Parry
26 West 61st Street
New York
NY
10023
US
|
Assignee: |
GOTIT LTD.
|
Family ID: |
11073750 |
Appl. No.: |
10/772547 |
Filed: |
February 5, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10772547 |
Feb 5, 2004 |
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10181876 |
Oct 10, 2002 |
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10181876 |
Oct 10, 2002 |
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PCT/IL01/00068 |
Jan 24, 2001 |
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Current U.S.
Class: |
222/54 |
Current CPC
Class: |
B65D 83/48 20130101;
B65D 2213/00 20130101; B65D 83/32 20130101; B65D 83/265
20130101 |
Class at
Publication: |
222/054 |
International
Class: |
B67D 005/08 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 25, 2000 |
IL |
134219 |
Claims
1. A dispenser for attachment to a container containing a fluid,
comprising: an actuator operative to allow said fluid to be
released from said container into said dispenser; and an
intermittent dispensing assembly that provides an intermittent
fluid output, said intermittent dispensing assembly comprising a
temperature responsive shifting element, said temperature
responsive shifting element being shiftable in response to
temperature changes in said dispenser and being generally freely
supported around a perimeter thereof in said dispenser.
2. A dispenser according to claim 1 and wherein said shifting
element comprises a bimetallic element having first and second
operative orientations depending on the temperature thereof.
3. A dispenser according to claim 2 and wherein said bimetallic
element comprises a bimetallic disc.
4. A dispenser according to claim 1 and wherein said intermittent
dispensing assembly comprises a plunger movable in response to
shifting of said shifting element.
5. A dispenser according to claim 4 and wherein said plunger is
loosely mounted onto said shifting element.
6. A dispenser according to claim 4 wherein said plunger is welded
to said shifting element.
7. A dispenser according to claim 4 wherein said plunger is
integrally formed with said shifting element.
8. A dispenser according to claim 4 and wherein said plunger is
engaged by a biasing spring element.
9. A dispenser according to claim 8 and wherein said biasing spring
element comprises a spiral spring.
10. A dispenser according to claim 8 and wherein said biasing
spring element comprises a helical spring.
11. A dispenser according to claim 8 and wherein said biasing
spring element comprises a leaf spring.
12. A dispenser according to claim 8 and wherein said biasing
spring comprises a folded over spring.
13. A dispenser according to claim 1 and wherein said intermittent
dispensing assembly also comprises a screw biased by a rotatably
adjustable knob.
14. A dispenser according to claim 13 and wherein said rotatably
adjustable knob is operative to select a time interval between
sprays.
15. A dispenser according to claim 13 and wherein said rotatably
adjustable knob is operative to select a spray initiation
temperature.
16. A dispenser according to claim 4 and also including a spray
release valve.
17. A dispenser according to claim 16 and wherein said plunger
engages a ball of said spray release valve.
18. A dispenser according to claim 16 and wherein said plunger
comprises a pin for engaging said spray release valve.
19. A dispenser according to claim 1 and wherein said dispenser
comprises a plurality of radially distributed inward facing
resilient prongs for resiliently engaging said container.
20. A dispenser according to claim 19 and wherein said prongs are
provided with legs for engaging said container so as to prevent
removal of said dispenser from said container.
21. A dispenser according to claim 20 and wherein said prongs
engage said container at a location adjacent to a portion of a
cover of a container opening valve of said container.
22. A dispenser according to claim 21 and wherein said location is
on an outwardly protruding portion of said cover for engaging
inwardly facing legs of said prongs.
23. A dispenser according to claim 1 and wherein said dispenser
engages said container in a ringless engagement.
24. A dispenser according to claim 1 and wherein said dispenser
comprises a fastening element resiliently engaging said
container.
25. A dispenser according to claim 1 and also comprising at least
one spray nozzle.
26. A dispenser according to claim 1 and wherein said dispenser is
formed with a recess on a bottom portion thereof.
27. A dispenser according to claim 26 and wherein said recess
engages a discharge orifice element of a container opening valve of
said container.
28. A dispenser according to claim 1 and wherein said intermittent
dispensing assembly also comprises a temperature dependent biasing
force application functionality.
29. A dispenser according to claim 28 and wherein said temperature
dependent biasing force application functionality comprises an
ambient temperature sensor responsive to changes in ambient
temperature outside said dispenser so as to selectively bias said
shifting element.
30. A dispenser according to claim 29 and wherein said ambient
temperature sensor comprises a bimetallic coil element.
31. A dispenser according to claim 29 and wherein said ambient
temperature sensor does not communicate with said fluid.
32. A dispenser according to claim 29 and also comprising a
rotatable cam fixedly mounted onto a shaft rotatable by said
ambient temperature sensor.
33. A dispenser according to claim 1 and wherein a rotatable cam
applies a biasing force to a biasing spring element.
34. A dispenser according to claim 33 and wherein said biasing
force increases as ambient temperature outside said dispenser is
lowered and decreases as said temperature rises.
35. A dispenser according to claim 34 and wherein said biasing
force is minimized when said temperature is below a minimum
operation temperature.
36. A dispenser according to claim 34 and wherein said biasing
force is minimized when said temperature is above a maximum
operation temperature.
37. A dispenser according to claim 36 and wherein said temperature
above said maximum operation temperature is below a shift actuating
temperature of said shifting element.
38. A dispenser according to claim 33 and wherein said rotatable
cam has a thickness such that said rotatable cam applies a suitable
biasing force to said shifting element via said biasing spring
element so as to dispense said fluid substantially within a uniform
selected time interval between sprays.
39. A dispenser according to claim 33 and wherein said rotatable
cam has a thickness sufficiently small such that said rotatable cam
provides a sufficiently low-biasing force to said shifting element
so as to minimize shifting of said shifting element.
40. A dispenser according to claim 1 and wherein said shifting
element is loosely mounted within said dispenser.
41. A dispenser according to claim 1 and wherein said shifting
element is seated in an annular recess in said dispenser.
42. A dispenser according to claim 1 and wherein said dispenser
comprises a volume surrounding said shifting element and being
formed with inclined walls on a bottom portion thereof.
43. A dispenser according to claim 1 and wherein at least part of
said fluid passes around said shifting element via passageways
formed in said dispenser.
44. A dispenser according to claim 1 and wherein a volume overlying
said shifting element allows for enhanced dissipation of said fluid
and thereby reduces incidence of liquid droplets in said fluid
exiting said dispenser.
45. A dispenser according to claim 1 and wherein said dispenser
defines an internal volume so as to relatively thermally isolate
said intermittent dispensing assembly from the ambient outside said
dispenser.
46. A dispenser according to claim 1 and wherein said fluid is
dispensed as an aerosol.
47. A dispenser according to claim 1 and wherein said fluid is
dispensed as a dissipated aerosol.
48. A dispenser according to claim 1 and wherein said fluid
comprises a deodorant.
49. A dispenser according to claim 1 and wherein said fluid
comprises an insecticide.
50. A dispenser according to claim 1 and also comprising a flow
prevention element.
51. A fluid dispensing system comprising: a container containing a
fluid; and a dispenser for receiving said fluid via an opening in
said container and comprising an intermittent dispensing assembly
that provides an intermittent fluid output, said intermittent
dispensing assembly comprising a temperature responsive shifting
element, said temperature responsive shifting element being
shiftable in response to temperature changes in said dispenser and
being generally freely supported around a perimeter thereof in said
dispenser.
52. A dispenser according to claim 51 and wherein said shifting
element comprises a bimetallic element having first and second
operative orientations depending on the temperature thereof.
53. A dispenser according to claim 52 and wherein said bimetallic
element comprises a bimetallic disc.
54. A dispenser according to claim 51 and wherein said intermittent
dispensing assembly comprises a plunger, movable in response to
shifting of said shifting element.
55. A dispenser according to claim 54 and wherein said plunger is
loosely mounted onto said shifting element.
56. A dispenser according to claim 54 wherein said plunger is
welded to said shifting element.
57. A dispenser according to claim 54 wherein said plunger is
integrally formed with said shifting element.
58. A dispenser according to claim 54 and wherein said plunger is
engaged by a biasing spring element.
59. A dispenser according to claim 58 and wherein said biasing
spring element comprises a spiral spring.
60. A dispenser according to claim 58 and wherein said biasing
spring element comprises a helical spring.
61. A dispenser according to claim 58 and wherein said biasing
spring element comprises a leaf spring.
62. A dispenser according to claim 58 and wherein said biasing
spring element comprises a folded over spring.
63. A dispenser according to claim 51 and wherein said intermittent
dispensing assembly also comprises a screw biased by a rotatably
adjustable knob.
64. A dispenser according to claim 63 and wherein said rotatably
adjustable knob is operative to select a time interval between
sprays.
65. A dispenser according to claim 63 and wherein said rotatably
adjustable knob is operative to select a spray initiation
temperature.
66. A dispenser according to claim 54 and also including a spray
release valve.
67. A dispenser according to claim 66 and wherein said plunger
engages a ball of said spray release valve.
68. A dispenser according to claim 66 and wherein said plunger
comprises a pin for engaging said spray release valve.
69. A dispenser according to claim 51 and wherein said dispenser
comprises a plurality of radially distributed inward facing
resilient prongs for resiliently engaging said container.
70. A dispenser according to claim 69 and wherein said prongs are
provided with legs for engaging said container so as to prevent
removal of said dispenser from said container.
71. A dispenser according to claim 70 and wherein said prongs
engage said container at a location adjacent to a portion of a
cover of a container opening valve of said container.
72. A dispenser according to claim 71 and wherein said location is
on an outwardly protruding portion of said cover for engaging
inwardly facing legs of said prongs.
73. A dispenser according to claim 51 and wherein said dispenser
engages said container in a ringless engagement.
74. A dispenser according to claim 51 and also comprising at least
one spray nozzle.
75. A dispenser according to claim 51 and wherein said dispenser
comprises a fluid passageway connected to a dip tube of said
container.
76. A dispenser according to claim 58 and wherein said biasing
spring element applies a fixed force to said plunger.
77. A dispenser according to claim 58 and wherein said biasing
spring element applies a variable force to said plunger.
78. A dispenser according to claim 51 and also comprising a
temperature dependent biasing force application functionality.
79. A dispenser according to claim 78 and wherein said temperature
dependent biasing force application functionality comprises an
ambient temperature sensor responsive to changes in ambient
temperature outside said dispenser so as to selectively bias said
shifting element.
80. A dispenser according to claim 79 and wherein said ambient
temperature sensor comprises a bimetallic coil element.
81. A dispenser according to claim 79 and wherein said ambient
temperature sensor does not communicate with said fluid.
82. A dispenser according to claim 79 and also comprising a
rotatable cam fixedly mounted onto a shaft rotatable by said
ambient temperature sensor.
83. A dispenser according to claim 79 and wherein said rotatable
cam applies a biasing force to a biasing spring element.
84. A dispenser according to claim 83 and wherein said biasing
force increases as ambient temperature outside said dispenser is
lowered and decreases as said temperature rises.
85. A dispenser according to claim 84 and wherein said biasing
force is minimized when said temperature is below a minimum
operation temperature.
86. A dispenser according to claim 84 and wherein said biasing
force is minimized when said temperature is above a maximum
operation temperature.
87. A dispenser according to claim 86 and wherein said temperature
above said maximum operation temperature is below a shift actuating
temperature of said shifting element.
88. A dispenser according to claim 83 and wherein said rotatable
cam has a thickness such that said rotatable cam applies a suitable
biasing force to said shifting element via said biasing spring
element so as to dispense said fluid substantially within a uniform
selected time interval between sprays.
89. A dispenser according to claim 83 and wherein said rotatable
cam has a thickness sufficiently small such that said rotatable cam
provides a sufficiently low biasing force to said shifting element
so as to minimize shifting of said shifting element.
90. A dispenser according to claim 51 and wherein said shifting
element is loosely mounted within said dispenser.
91. A dispenser according to claim 51 and wherein said shifting
element is seated in an annular recess in said dispenser.
92. A dispenser according to claim 51 and wherein said dispenser
comprises a volume surrounding said shifting element which is
formed with inclined walls on a bottom portion thereof.
93. A dispenser according to claim 51 and wherein at least part of
said fluid passes around said shifting element via passageways
formed in said dispenser.
94. A dispenser according to claim 51 and wherein a volume
overlying said shifting element allows for enhanced dissipation of
said fluid and thereby reduces incidence of liquid droplets in said
fluid exiting said dispenser.
95. A dispenser according to claim 51 and wherein said dispenser
defines an internal volume so as to relatively thermally isolate
said intermittent dispensing assembly from the ambient outside said
dispenser.
96. A dispenser according to claim 51 and wherein said fluid is
dispensed as an aerosol.
97. A dispenser according to claim 51 and wherein said fluid is
dispensed as a dissipated aerosol.
98. A dispenser according to claim 51 and wherein said fluid
comprises a deodorant.
99. A dispenser according to claim 51 and wherein said fluid
comprises an insecticide.
100. A dispenser according to claim 51 and also comprising a flow
prevention element.
101. A dispenser for attachment to a container having a container
opening valve and containing a fluid, comprising: an actuator for
keeping said container opening valve in a substantially open
position so as to allow said fluid to pass into said dispenser; and
an intermittent dispensing valve that provides an intermittent
fluid output, said intermittent dispensing valve comprising a
temperature responsive valve control element which is responsive to
temperature changes resulting from dispensed fluid, said
temperature responsive valve control element being generally freely
supported around a perimeter thereof in said dispenser.
102. A dispenser according to claim 101 and wherein said control
element comprises a bimetallic element having first and second
operative orientations depending on the temperature thereof.
103. A dispenser according to claim 102 and wherein said bimetallic
element comprises a bimetallic disc.
104. A dispenser according to claim 101 and wherein said
intermittent dispensing valve comprises a plunger movable in
response to shifting of said control element.
105. A dispenser according to claim 104 and wherein said plunger is
loosely mounted onto said control element.
106. A dispenser according to claim 104 wherein said plunger is
welded to said control element.
107. A dispenser according to claim 104 wherein said plunger is
integrally formed with said control element.
108. A dispenser according to claim 104 and wherein said plunger is
engaged by a biasing spring element.
109. A dispenser according to claim 108 and wherein said biasing
spring element comprises a spiral spring.
110. A dispenser according to claim 108 and wherein said biasing
spring element comprises a helical spring.
111. A dispenser according to claim 108 and wherein said biasing
spring element comprises a leaf spring.
112. A dispenser according to claim 108 and wherein said biasing
spring element comprises a folded over spring.
113. A dispenser according to claim 104 and wherein said plunger
engages a ball of said intermittent dispensing valve.
114. A dispenser according to claim 104 and wherein said plunger
comprises a pin for engaging said intermittent dispensing
valve.
115. A dispenser according to claim 101 and also comprising a screw
biased by a rotatably adjustable knob.
116. A dispenser according to claim 115 and wherein said rotatably
adjustable knob is operative to select a time interval between
sprays.
117. A dispenser according to claim 115 and wherein said rotatably
adjustable knob is operative to select a spray initiation
temperature.
118. A dispenser according to claim 101 and wherein said dispenser
comprises a fastening element resiliently engaging said
container.
119. A dispenser according to claim 101 and wherein said dispenser
comprises a plurality of radially distributed inward facing
resilient prongs for resiliently engaging said container.
120. A dispenser according to claim 119 and wherein said prongs are
provided with legs for engaging said container so as to prevent
removal of said dispenser from said container.
121. A dispenser according to claim 120 and wherein said prongs
engage said container at a location adjacent to a portion of a
cover of said container opening valve.
122. A dispenser according to claim 121 and wherein said location
is on an outwardly protruding portion of said cover for engaging
inwardly facing legs of said prongs.
123. A dispenser according to claim 101 and wherein said dispenser
engages said container in a ringless engagement.
124. A dispenser according to claim 101 and also comprising at
least one spray nozzle.
125. A dispenser according to claim 101 and wherein said dispenser
is formed with a recess on a bottom portion thereof.
126. A dispenser according to claim 125 and wherein said recess
engages a discharge orifice element of said container opening
valve.
127. A dispenser according to claim 126 wherein said recess
accommodates at least one removable mounting element configured to
engage said discharge orifice element.
128. A dispenser according to claim 101 and also comprising a
temperature dependent biasing force application functionality.
129. A dispenser according to claim 128 and wherein said
temperature dependent biasing force application functionality
comprises an ambient temperature sensor responsive to changes in
ambient temperature outside said dispenser so as to selectively
bias said control element.
130. A dispenser according to claim 129 and wherein said ambient
temperature sensor comprises a bimetallic coil element.
131. A dispenser according to claim 129 and wherein said ambient
temperature sensor does not communicate with said fluid.
132. A dispenser according to claim 129 and also comprising a
rotatable cam fixedly mounted onto a shaft rotatable by said
ambient temperature sensor.
133. A dispenser according to claim 101 and wherein a rotatable cam
applies a biasing force to a biasing spring element.
134. A dispenser according to claim 133 and wherein said biasing
force increases as ambient temperature outside said dispenser is
lowered and decreases as said temperature rises.
135. A dispenser according to claim 134 and wherein said biasing
force is minimized when said temperature is below a minimum
operation temperature.
136. A dispenser according to claim 134 and wherein said biasing
force is minimized when said temperature is above a maximum
operation temperature.
137. A dispenser according to claim 136 and wherein said
temperature above said maximum operation temperature is below a
shift actuating temperature of said control element.
138. A dispenser according to claim 133 and wherein said rotatable
cam has a thickness such that said rotatable cam applies a suitable
biasing force to said control element via said biasing spring
element so as to dispense said fluid substantially within a uniform
selected time interval between sprays.
139. A dispenser according to claim 133 and wherein said rotatable
cam has a thickness sufficiently small such that said rotatable cam
provides a sufficiently low biasing force to said control element
so as to minimize shifting of said control element.
140. A dispenser according to claim 101 and wherein said control
element is seated in an annular recess in said dispenser.
141. A dispenser according to claim 101 and wherein said control
element is loosely mounted within said dispenser.
142. A dispenser according to claim 101 and wherein said dispenser
comprises a volume surrounding said control element, said volume
being formed with inclined walls on a bottom portion thereof.
143. A dispenser according to claim 101 and wherein at least part
of said fluid passes around said control element via passageways
formed in said dispenser.
144. A dispenser according to claim 101 and wherein a volume
overlying said control element allows for enhanced dissipation of
said fluid and thereby reduces incidence of liquid droplets in said
fluid exiting said dispenser.
145. A dispenser according to claim 101 and wherein said dispenser
defines an internal volume so as to relatively thermally isolate
said intermittent dispensing valve from the ambient outside said
dispenser.
146. A dispenser according to claim 101 and wherein said fluid is
dispensed as an aerosol.
147. A dispenser according to claim 101 and wherein said fluid is
dispensed as a dissipated aerosol.
148. A dispenser according to claim 101 and wherein said fluid
comprises a deodorant.
149. A dispenser according to claim 101 and wherein-said fluid
comprises an insecticide.
150. A dispenser according to claim 101 and also comprising a flow
prevention element.
151. A dispenser for resilient attachment to a container containing
a fluid for intermittently dispensing said fluid, comprising prongs
for attachment to said container at a location adjacent to a
portion of a cover of a: container opening valve of said
container.
152. A dispenser according to claim 151 and wherein said attachment
is a ringless attachment.
153. A method for dispensing a fluid from a container comprising:
attaching a dispenser to said container, said dispenser comprising
an actuator so as to allow said fluid to be released into said
dispenser; and automatically intermittently dispensing said fluid
from said dispenser using an intermittent dispensing assembly
comprising a temperature responsive shifting element, said
temperature responsive shifting element being shiftable in response
to temperature changes in said dispenser and being generally freely
supported around a perimeter thereof in said dispenser.
154. A method for dispensing a fluid according to claim 153 and
wherein said shifting element has first and second operative
orientations depending on the temperature thereof.
155. A method for dispensing a fluid according to claim 153 and
wherein said attaching said dispenser to said container comprises
engaging said container with a fastening element.
156. A method for dispensing a fluid according to claim 153 and
wherein said attaching said dispenser to said container comprises
resiliently engaging said container with a plurality of radially
distributed inward facing resilient prongs.
157. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing said
fluid via at least one spray nozzle.
158. A method for dispensing a fluid according to claim 153 and
also comprising selectively biasing said shifting element by an
ambient temperature sensor.
159. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises opening a spray
release valve of said dispenser so as to dispense said fluid.
160. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises retaining a
portion of said fluid, and subsequently releasing said portion of
said fluid.
161. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises passing at least
part of said fluid around said shifting element, via passageways
formed in said dispenser.
162. A method for dispensing a fluid according to claim 157 and
wherein said intermittently dispensing comprises producing enhanced
dissipation in a relatively large volume overlying said shifting
element and reducing incidence of liquid droplets in said fluid
exiting said at least one spray nozzle.
163. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing said
fluid substantially within a uniform selected time interval between
sprays.
164. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing said
fluid substantially at a selected spray initiation temperature.
165. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing said
fluid as an aerosol.
166. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing said
fluid as a dissipated aerosol.
167. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing a
deodorant.
168. A method for dispensing a fluid according to claim 153 and
wherein said intermittently dispensing comprises dispensing an
insecticide.
169. A method for dispensing a fluid according to claim 154 and
wherein said shifting element shifts to said first operative
orientation in response to cooling of said shifting element by
dispensed fluid.
170. A method for dispensing a fluid according to claim 154 and
wherein said shifting element shifts to said second operative
orientation in response to warming of said shifting element by the
ambient outside said dispenser.
171. A method for dispensing a fluid according to claim 153 and
also comprising positioning a flow prevention element of said
dispenser to allow said fluid to be released into said
dispenser.
172. A method for dispensing a fluid from a container comprising:
providing a container with a container opening; attaching a
dispenser to said container for receiving said fluid from said
container; and automatically intermittently dispensing said fluid
from said dispenser using an intermittent dispensing assembly
comprising a temperature responsive shifting element, said
temperature responsive shifting element being shiftable in response
to temperature changes in said dispenser and being generally freely
supported around a perimeter thereof in said dispenser.
173. A method for dispensing a fluid according to claim 172 and
wherein said shifting element has first and second operative
orientations depending on the temperature thereof.
174. A method for dispensing a fluid according to claim 172 and
wherein said attaching said dispenser to said container comprises
engaging said container with an extension extending from said
dispenser.
175. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing said
fluid via at least one spray nozzle.
176. A method for dispensing a fluid according to claim 172 and
also comprising selectively biasing said shifting element by an
ambient temperature sensor.
177. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises opening a spray
release valve of said dispenser so as to dispense said fluid.
178. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises retaining a
portion of said fluid, and subsequently releasing said portion of
said fluid.
179. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises passing at least
part of said fluid around said shifting element, via passageways
formed in said dispenser.
180. A method for dispensing a fluid according to claim 175 and
wherein said intermittently dispensing comprises producing enhanced
dissipation in a relatively large volume overlying said shifting
element and reducing incidence of liquid droplets in said fluid
exiting said at least one spray nozzle.
181. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing said
fluid substantially within a uniform selected time interval between
sprays.
182. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing said
fluid substantially at a selected-spray initiation temperature.
183. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing said
fluid as an aerosol.
184. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing said
fluid as a dissipated aerosol.
185. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing a
deodorant.
186. A method for dispensing a fluid according to claim 172 and
wherein said intermittently dispensing comprises dispensing an
insecticide.
187. A method for dispensing a fluid according to claim 173 and
wherein said shifting element shifts to said first operative
orientation in response to cooling of said shifting element by
dispensed fluid.
188. A method for dispensing a fluid according to claim 173 and
wherein said shifting element shifts to said second operative
orientation in response to warming of said shifting element by the
ambient outside said dispenser.
189. A method for dispensing a fluid according to claim 172 and
also comprising positioning a flow prevention element of said
dispenser to allow said fluid to be released into said
dispenser.
190. Biasing functionality for a dispenser intermittently
dispensing a fluid in response to temperature changes, comprising:
a plunger; a temperature responsive shifting element being
shiftable in response to temperature changes and mounted on said
plunger; and a spring biasing element engaging said plunger so as
to cause said shifting element to shift substantially at a selected
temperature.
191. Biasing functionality according to claim 190 and wherein said
shifting element comprises a bimetallic element having first and
second operative orientations depending on the temperature
thereof.
192. Biasing functionality according to claim 191 and wherein said
bimetallic element comprises a bimetallic disc.
193. Biasing functionality according to claim 190 and wherein said
plunger is loosely mounted onto said shifting element.
194. Biasing functionality according to claim 190 wherein said
plunger is welded to said shifting element.
195. Biasing functionality according to claim 190 wherein said
plunger is integrally formed with said shifting element.
196. Biasing functionality according to claim 190 and wherein said
biasing spring element comprises a spiral spring.
197. Biasing functionality according to claim 190 and wherein said
biasing spring element comprises a helical spring.
198. Biasing functionality according to claim 190 and wherein said
biasing spring element comprises a leaf spring.
199. Biasing functionality according to claim 190 and wherein said
biasing spring comprises a folded over spring.
200. Biasing functionality according to claim 190 and also
comprising a screw biased by a rotatably adjustable knob and
cooperating with said spring biasing element.
201. Biasing functionality according to claim 190 and wherein said
biasing spring applies a fixed force to said plunger.
202. Biasing functionality according to claim 190 and wherein said
biasing spring applies a variable force to said plunger.
203. Biasing functionality according to claim 200 and wherein said
rotatably adjustable knob is operative to select a time interval
between sprays.
204. Biasing functionality according to claim 200 and wherein said
rotatably adjustable knob is operative to select a spray initiation
temperature.
205. Biasing functionality according to claim 190 and also
comprising temperature dependent biasing force application
functionality.
206. Biasing functionality according to claim 205 and wherein said
temperature dependent biasing force application functionality
comprises an ambient temperature sensor responsive to changes in
ambient temperature outside said dispenser so as to selectively
bias said shifting element.
207. Biasing functionality according to claim 206 and wherein said
ambient temperature sensor comprises a bimetallic coil element.
208. Biasing functionality according to claim 206 and wherein said
ambient temperature sensor does not communicate with said
fluid.
209. Biasing functionality according to claim 206 and also
comprising a rotatable cam fixedly mounted onto a shaft rotatable
by said ambient temperature sensor.
210. Biasing functionality according to claim 200 and wherein a
rotatable cam operated by said knob applies a biasing force to said
biasing spring element.
211. Biasing functionality according to claim 210 and wherein said
biasing force increases as ambient temperature outside said
dispenser is lowered and decreases as said temperature rises.
212. Biasing functionality according to claim 211 and wherein said
biasing force is minimized when said temperature is below a minimum
operation temperature.
213. Biasing functionality according to claim 211 and wherein said
biasing force is minimized when said temperature is above a maximum
operation temperature.
214. Biasing functionality according to claim 213 and wherein said
temperature above said maximum operation temperature is below a
shift actuating temperature of said shifting element.
215. Biasing functionality according to claim 210 and wherein said
rotatable cam has a thickness such that said rotatable cam applies
a suitable biasing force to said shifting element via said biasing
spring element so as to dispense said fluid substantially within a
uniform selected time interval between sprays.
216. Biasing functionality according to claim 210 and wherein said
rotatable cam has a thickness sufficiently small such that said
rotatable cam provides a sufficiently low biasing force to said
shifting element so as to minimize shifting of said shifting
element.
217. Biasing functionality according to claim 190 and wherein said
shifting element is loosely mounted within said dispenser.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S.
application Ser. No. 10/181,876, filed Oct. 10, 2002, entitled
"SPRAY DISPENSER" , the contents of which are incorporated by
reference.
FIELD OF THE INVENTION
[0002] The present invention relates generally to the field of
spray dispensers.
BACKGROUND OF THE INVENTION
[0003] Certain products such as insecticides and air fresheners are
commonly supplied in pressurized containers. The contents of the
container are usually dispensed to the atmosphere by pressing down
on a valve at the top of the container, as seen for example in U.S.
Pat. No. 1,800,156. The contents of the container are consequently
emitted through a channel in the valve.
[0004] In many cases it is desired that the contents of the
container be automatically dispensed periodically. Many automatic
dispensers are known in the art, such as U.S. Pat. No. 6,517,009 of
the present inventor, the disclosure of which is incorporated
herein by reference. U.S. Pat. No. 6,517,009 discloses apparatus
and method for automatically spraying fluid material in response to
a signal from a sensor. The sensor senses the concentration of the
fluid material within gas filled surroundings and generates signals
responsive to the concentration of the fluid material.
[0005] A type of automatic dispenser includes dispensers with
mechanical means, such as an arm or cam, which periodically presses
the valve of the container. Such dispensers are described, for
example, in U.S. Pat. Nos. 3,018,056; 3,543,122; 3,739,944;
3,768,732; 4,184,612; and 5,038,972. However, these dispensers
cannot accurately control the output of the container, since the
valve and the contact of the dispenser with the valve are not
accurately controlled by the dispenser. Furthermore, these
dispensers are generally not portable and are fit for use only with
containers of a specific size. The dispensers may be costly and
require substantial electrical power and frequent reloading of
batteries. The valves are also susceptible to failure because of
valve sticking, resulting in loss of the requisite snap action
desired for spraying contents from a container or in complete
discharge of the contents of the container within a short
period.
[0006] A further type of automatic dispenser employs a solenoid,
which is periodically energized in order to emit a burst of the
contents of the container. Such dispensers are described, for
example, in U.S. Pat. Nos. 3,187,949; 3,351,240; 4,415,797; and
6,216,925 and U.K. Pat. No. 2,488,888. These dispensers are
dependent on gravity and/or the fluid pressure in the container for
successful operation. These dispensers are complex, costly, and
require substantial electrical power.
[0007] An additional type of automatic dispensers are described,
for example, in U.S. Pat. Nos. 2,719,432; 3,477,613; 3,542,248,
3,589,562; 3,658,209, 3,722,749; 3,788,550; 4,077,542; 4,469,255;
5,025,962 5,364,028, 5,447,273, and 6,612,464. In this type of
automatic dispenser, the pneumatic pressure of the container is
used to operate a timing device causing the contents of the
container to be periodically dispensed. However, the ability to
control the dispensation intervals is complicated and limited due
to the pneumatic characteristic of the timing device or the need
for the user to periodically turn a flow control valve. Complex
accumulation chambers may add to the manufacturing cost of the
dispensers. Spring-biased diaphragms employed in the pneumatic
pressure operated automatic dispenser are susceptible to failure
due to clogging or leaks. The amount and timing of sprays is hard
to control since repeated spray discharges reduce the pressure in a
typical container over time, for example from 6 atmospheres to less
than 2 atmospheres. The pressure in the container may be lowered in
cooler ambient surroundings, contributing to unreliable and
non-uniform spraying.
[0008] Another type of automatic dispenser is described in U.S.
Pat. No. 6,540,155 of the present inventor, the disclosure of which
is incorporated herein by reference. This type of automatic spray
dispenser allows accurate control of the amount of discharged
material, and allows flexibility in setting the frequency of
dispensation. This is preferably accomplished by means of a
processor. The dispenser has an open state in which fluid is
discharged from a can or container, and a closed state in which the
fluid is not emitted. A motor is provided which changes the state
of the dispenser between the open and closed states. This is
preferably accomplished by means of a flexible lever which is
coupled to a threaded shaft which is attached to the motor. The
lever is normally in a closed state. The motor rotates the shaft,
thereby flexing the lever from the closed state to the open state
and vice versa, depending on the direction of rotation.
[0009] A further type of automatic dispenser utilizes a bimetallic
spring connected to a valve to control dispensing the contents of a
pressurized container. In this dispenser, the bimetallic spring
starts, for example, at room temperature, wherein the valve is open
for dispensing the contents out of the container. As the contents
of the container flow outwards, they thermally contact the
bimetallic spring, thereby cooling the spring. Due to its lower
temperature, the spring contracts and closes the valve, thereby
stopping dispensing the contents from the container. Eventually the
bimetallic spring is warmed by the environment back to a
temperature sufficient for the spring to re-expand to its original
position, thereby opening the valve and once again dispensing a
portion of the contents.
[0010] One example of such a bimetallic mechanism includes U.S.
Pat. No. 4,361,013. U.S. Pat. No. 4,361,013 does not disclose a
spray dispenser, but rather a box for cooling items stored therein.
Coil or leaf type bimetallic springs are employed to axially adjust
a needle valve in response to temperature changes of the
pressurized container and spring caused by escaping vapor.
[0011] A Japanese inventor, Taisho Iketani, patented a number of
bimetallic spray devices. U.S. Pat. No. 3,360,165 of Iketani
discloses utilizing a screw adjustable bimetallic spring in the
path of dispensed content for spray-dispensing content from a
container. The bimetallic spring gradually extends until in
overcoming the bias of a counter spring it can push a valve past a
stopping spring. However, Iketani quickly discovered that such
springs are not suitable for spray-dispensing, because they lack
the requisite snap action for spraying contents from a
container.
[0012] Iketani improved the bimetallic spray dispenser in U.S. Pat.
No. 3,419,189, which utilizes a bimetallic disc, shaped like a
Belleville washer, clamped around its periphery. However, while the
disc does provide the requisite snap action for spraying the
contents, nevertheless the bimetallic disc does not operate
properly when clamped around its periphery.
[0013] In his next patent, U.S. Pat. No. 3,596,800, Iketani
describes the abovementioned problem in col. 3, lines 35-43: "The
conventional mechanism for supporting a disc-shaped bimetal has
been disadvantageous in that slight misalignment of the bimetal or
small variation in its size may result in an accidental reversing
movement of the bimetal depending upon the clamping forces exerted
on its periphery and therefore it is almost impossible to obtain a
uniform finished product. Such a problem becomes more serious
because the valve mechanism of this type is extremely small."
Iketani proposed to solve the problem by clamping not around the
entire periphery but rather at a number of discrete points around
the periphery. A heat insulating sponge is employed to delay
intervals between sprays and battery powered heating is preferably
added to ensure operation in cold districts.
[0014] In U.S. Pat. No. 3,685,693, which is a divisional of U.S.
Pat. No. 3,596,800, Iketani utilized the same type of discrete
clamping. U.S. Pat. No. 3,685,693 discloses that it is impossible
to operate the device when the temperature of the bimetallic disc
of a heat responsive valve fails to rise above its preselected
valve opening temperature. Therefore a manually control heat
responsive means is added for spraying without the bimetallic
disc.
[0015] In U.S. Pat. No. 3,684,133 Iketani sandwiched the bimetallic
disc between portions of a spongy material inwards of the clamped
periphery. The purpose of the spongy material is to absorb a
volatile liquid, such as methyl alcohol, mixed with the pressurized
contents of the spray container, so as to enhance cooling of the
bimetallic disc and extend the time period in which the disc is
raised or lowered. The device further provides an additional vent
that could be enlarged so as to increase the time interval between
sprays or could be made smaller so as to shorten the time interval
between sprays. However, these features failed to provide reliable
snapping action desired for clean and uniform spraying.
[0016] Thus, even with the discrete clamping of the bimetallic
disc, these bimetallic spray dispensers have not had reliable
performance and apparently have never had any commercial
success.
[0017] The prior art dispensers did not provide uniform periodicity
of intermittent sprays of fluid without use of electric circuits or
processors.
SUMMARY OF THE INVENTION
[0018] The present invention seeks to provide improved spray
dispensers.
[0019] It is an object of the present invention to provide an
inexpensive, readily available automatic dispenser that can be
reliably operated without batteries to provide predetermined
dosages of spray at predetermined intervals at a variety of
temperatures and settings.
[0020] It is another object of the present invention to provide an
automatic spray dispenser with a simple and inexpensive
construction that improves upon the prior art devices.
[0021] It is yet another object of the present invention to provide
a bimetallic disc, which is freely supported around its perimeter.
Thus the bimetallic disc does not have the disadvantage of being
sensitive to slight misalignments or variations in size, and does
not accidentally reverse its movement. This solves the problem of
the prior art found in devices like Iketani's, as described
hereinabove.
[0022] It is still another object of the present invention, again
in contradistinction to Iketani, to provide a generally rectangular
bimetallic element that can either be freely supported, clamped all
around its perimeter or clamped only at its short ends. This solves
the abovementioned problem of the prior art. Unlike the circular
disc, the rectangular bimetallic element is not sensitive to slight
misalignments or variations in size, and does not accidentally
reverse its movement under the influence of all-around
clamping.
[0023] It is a further object of the present invention to allow
spray to be automatically dispensed at a predetermined temperature
by adjusting a knob.
[0024] It is a still further object of the present invention to
employ a temperature dependent biasing force application
functionality that will allow spray to be automatically dispensed
at a predetermined selected temperature. The predetermined selected
temperature is preferably below a shift actuating temperature, of
the selected bimetallic disc. Messy sponges and unwanted leaks of
fluid material can be avoided.
[0025] It is a yet further object of the present invention to
provide a safety valve that prevents undesirable overspraying of
the contents of a spray container.
[0026] It is a still further object of the present invention to
provide an automatic dispenser that does not require electrical
power supply or batteries. Furthermore, the dispenser may provide
uniform periodicity of intermittent sprays of fluid without use of
electric circuits or processors.
[0027] It is another object of the present invention to provide a
dispenser configured to be easily attached and detached from a
variety of conventional spray containers of different sizes and
configurations and may be transferred from one container to
another. Alternatively, a system comprising a dispenser and a spray
container may be provided. The dispenser may be attractively
constructed in small, unobtrusive dimensions for easy attachment at
a cover of a container opening valve of a conventional aerosol
container, with or without the use of rings. Alternatively,
dispensers with relatively large peripheral diameters may be
attached at an upper or lower rim of a conventional aerosol
container.
[0028] It is yet another object of the present invention to provide
a dispenser, which automatically discharges spray without being
dependent on the ambient temperature. Alternatively, a dispenser
may allow ambient temperature dependent discharge of spray.
[0029] The dispenser may be provided with a temperature dependent
biasing force application functionality including a temperature
sensor operative to provide uniform time intervals between sprays
notwithstanding temperature changes in ambient environments. The
dispenser may also be provided with automatic shut off devices to
stop operation of the dispenser when ambient temperatures outside
the dispenser are outside a predetermined range of ambient
temperatures within the dispenser.
[0030] It is still another object of the present invention to
provide a dispenser with a user selection knob so as to enable a
user to select an operational parameter of the dispenser, such as
the time interval between sprays and the spray initiation
temperature.
[0031] It is a further object of the present invention to provide a
dispenser which provides reduction in the incidence of liquid
droplets in discharged spray.
[0032] It is a yet further object of the present invention to
provide a dispenser suitable for use in various environments, such
as in a domestic environment, an institutional environment, an
agricultural environment and an industrial environment.
[0033] It is a still further object of the present invention to
provide a dispenser which provides generally uniform operation of
the spray dispenser, such as uniform interval between sprays, spray
duration and the quantity of released spray. The dispenser's
ability to control for periodicity and uniform duration and dosage
of released spray enables the dispenser to provide a chosen
container with a selected lifetime of use measurable in a
predetermined number of days, weeks or months.
[0034] The dispenser may be used to automatically spray materials
that should be released in predetermined quantities at
predetermined times.
[0035] It is another object of the present invention to provide a
dispenser comprised of a top and a bottom housing portion
constructed and configured to be readily attached during
manufacturing, such as by a snap-fit attachment or by ultrasonic
welding. A bimetallic disc may be placed in a recess between top
and bottom housing portions, without being discretely clamped
therein, at minimal manufacturing costs.
[0036] It is yet another object of the present invention to provide
a dispenser with a flow prevention element operative to be
positioned by a user in a position which prevents fluid from
reaching a spray release valve of the dispenser and thus prevents
fluid from exiting a spray nozzle of the dispenser. The flow
prevention element may also be positioned to prevent fluid from
reaching the spray release valve during shipment and storage
thereby preventing unwanted fluid discharge from the spray
dispenser.
[0037] The dispenser may be inexpensively built and attached to a
disposable container intended for single use.
[0038] There is thus provided in accordance with a preferred
embodiment of the present invention a dispenser for attachment to a
container containing a fluid, including an actuator operative to
allow the fluid to be released from the container into the
dispenser, and an intermittent dispensing assembly that provides an
intermittent fluid output, the intermittent dispensing assembly
including a temperature responsive shifting element, the
temperature responsive shifting element being shiftable in response
to temperature changes in the dispenser and being generally freely
supported around a perimeter thereof in the dispenser.
[0039] In accordance with another preferred embodiment of the
present invention the shifting element includes a bimetallic
element having first and second operative orientations depending on
the temperature thereof. Preferably, the bimetallic element
comprises a bimetallic disc.
[0040] In accordance with yet another preferred embodiment of the
present invention the intermittent dispensing assembly includes a
plunger movable in response to shifting of the shifting element.
Additionally, the plunger is loosely mounted onto the shifting
element. Alternatively, the plunger is welded to the shifting
element. Alternatively, the plunger is integrally formed with the
shifting element.
[0041] In accordance with still another preferred embodiment of the
present invention the plunger is engaged by a biasing spring
element. Preferably, the biasing spring element includes a spiral
spring. Alternatively, the biasing spring element includes a
helical spring. Alternatively, the biasing spring element includes
a leaf spring. Alternatively the biasing spring includes a folded
over spring.
[0042] In accordance with a further preferred embodiment of the
present invention the dispenser also includes a screw biased by a
rotatably adjustable knob. Preferably, the rotatably adjustable
knob is operative to select a time interval between sprays.
Alternatively, the rotatably adjustable knob is operative to select
a spray initiation temperature. Additionally, the dispenser also
includes a spray release valve.
[0043] In accordance with a yet further preferred embodiment of the
present invention the plunger engages a ball of the spray release
valve. Alternatively, the plunger includes a pin for engaging the
spray release valve. Additionally, the dispenser also includes at
least one spray nozzle.
[0044] In accordance with a still further preferred embodiment of
the present invention the dispenser includes a plurality of
radially distributed inward facing resilient prongs for resiliently
engaging the container. Preferably, the prongs are provided with
legs for engaging the container so as to prevent removal of the
dispenser from the container. Additionally, the prongs engage the
container at a location adjacent to a portion of a cover of a
container opening valve of the container. Additionally, the
location is on an outwardly protruding portion of the cover for
engaging inwardly facing legs of the prongs. Preferably, the
dispenser engages, the container in a ringless engagement.
[0045] In accordance with another preferred embodiment of the
present invention the dispenser includes a fastening element
resiliently engaging the container. Preferably, the dispenser is
formed with a recess on a bottom portion thereof. Preferably, the
recess engages a discharge orifice element of a container opening
valve of the container. Additionally, the dispenser also includes a
mounting element.
[0046] In accordance with another preferred embodiment of the
present invention the dispenser also includes a temperature
dependent biasing force application functionality.
[0047] In accordance with yet another preferred embodiment of the
present invention the temperature dependent biasing force
application functionality includes an ambient temperature sensor
responsive to changes in ambient temperature outside the dispenser
so as to selectively bias the shifting element. Preferably, the
ambient temperature sensor includes a bimetallic coil element.
Additionally, the ambient temperature sensor does not communicate
with the fluid.
[0048] In accordance with still another preferred embodiment of the
present invention the dispenser also includes a rotatable cam
fixedly mounted onto a shaft rotatable by the ambient temperature
sensor. Preferably, a rotatable cam applies a biasing force to a
biasing spring element. Additionally, the biasing force increases
as ambient temperature outside the dispenser is lowered and
decreases as the temperature rises.
[0049] In accordance with a further preferred embodiment of the
present invention the biasing force is minimized when the
temperature is below a minimum operation temperature. Additionally,
the biasing force is minimized when the temperature is above a
maximum operation temperature. Preferably, the temperature above
the maximum operation temperature is below a shift actuating
temperature of the shifting element.
[0050] In accordance with a yet further preferred embodiment of the
present invention the rotatable cam includes a cam thickness such
that the rotatable cam applies a suitable biasing force to the
shifting element via the biasing spring element so as to dispense
the fluid substantially within a uniform selected time interval
between sprays. Preferably, the rotatable cam includes a cam
thickness sufficiently small such that the rotatable cam provides a
sufficiently low biasing force to the shifting element so as to
minimize shifting of the shifting element.
[0051] In accordance with a still further preferred embodiment of
the present invention the shifting element is loosely mounted
within the dispenser. Preferably, the shifting element is seated in
an annular recess in the dispenser. Additionally, the dispenser
includes a volume surrounding the shifting element and being formed
with inclined walls on a bottom portion thereof.
[0052] In accordance with another preferred embodiment of the
present invention at least part of the fluid passes around the
shifting element via passageways formed in the dispenser.
Preferably, a volume overlying the shifting element allows for
enhanced dissipation of the fluid and thereby reduces incidence of
liquid droplets in the fluid exiting the dispenser. Additionally,
the dispenser defines an internal volume so as to relatively
thermally isolate the intermittent dispensing assembly from the
ambient outside the dispenser.
[0053] In accordance with yet another preferred embodiment of the
present invention the fluid is dispensed as an aerosol. Preferably,
the fluid is dispensed as a dissipated aerosol. Additionally, the
fluid includes a deodorant. Alternatively, the fluid includes an
insecticide. Preferably, the dispenser also includes a flow
prevention element.
[0054] There is thus provided in accordance with another preferred
embodiment of the present invention a fluid dispensing system
including a container containing a fluid, and a dispenser for
receiving the fluid via an opening in the container and including
an intermittent dispensing assembly that provides an intermittent
fluid output, the intermittent dispensing assembly including a
temperature responsive shifting element, the temperature responsive
shifting element being shiftable in response to temperature changes
in the dispenser and being generally freely supported around a
perimeter thereof in the dispenser.
[0055] There is thus provided in accordance with yet another
preferred embodiment of the present invention a dispenser for
attachment to a container having a container opening valve and
containing a fluid, including an actuator for keeping the container
opening valve in a substantially open position so as to allow the
fluid to pass into the dispenser, and an intermittent dispensing
valve that provides an intermittent fluid output, the intermittent
dispensing valve including a temperature responsive valve control
element which is responsive to temperature changes resulting from
dispensed fluid, the temperature responsive valve control element
being generally freely supported around a perimeter thereof in the
dispenser.
[0056] There is thus provided in accordance with still another
preferred embodiment of the present invention a dispenser for
resilient attachment to a container containing a fluid for
intermittently dispensing the fluid, including prongs for
attachment to the container at a location adjacent to a portion of
a cover of a container opening valve of the container. Preferably,
the attachment is a ringless attachment.
[0057] There is thus provided in accordance with still another
preferred embodiment of the present invention a method for
dispensing a fluid from a container including attaching a dispenser
to the container, the dispenser including an actuator so as to
allow the fluid to be released into the dispenser, and
automatically intermittently dispensing the fluid from the
dispenser using an intermittent dispensing assembly including a
temperature responsive shifting element, the temperature responsive
shifting element being shiftable in response to temperature changes
in the dispenser and being generally freely supported around a
perimeter thereof in the dispenser.
[0058] In accordance with another preferred embodiment of the
present invention the shifting element has first and second
operative orientations depending on the temperature thereof.
Preferably, the attaching the dispenser to the container includes
engaging the container with a fastening element. Additionally, the
attaching the dispenser to the container includes resiliently
engaging the container with a plurality of radially distributed
inward facing resilient prongs.
[0059] In accordance with yet another preferred embodiment of the
present invention the intermittently dispensing includes dispensing
the fluid via at least one spray nozzle. Preferably, the method for
dispensing a fluid also includes selectively biasing the shifting
element by an ambient temperature sensor. Additionally, the
intermittently dispensing includes opening a spray release valve of
the dispenser so as to dispense the fluid.
[0060] In accordance with still another preferred embodiment of the
present invention the intermittently dispensing includes retaining
a portion of the fluid, and subsequently releasing the portion of
the fluid. Preferably, the intermittently dispensing includes
passing at least part of the fluid around the shifting element, via
passageways formed in the dispenser. Additionally, the
intermittently dispensing includes producing enhanced dissipation
in a relatively large volume overlying the shifting element and
reducing incidence of liquid droplets in the fluid exiting the at
least one spray nozzle.
[0061] In accordance with a further preferred embodiment of the
present invention the intermittently dispensing includes dispensing
the fluid substantially within a uniform selected time interval
between sprays. Preferably, the intermittently dispensing includes
dispensing the fluid substantially at a selected spray initiation
temperature. Additionally, the intermittently dispensing includes
dispensing the fluid as an aerosol. Preferably, the intermittently
dispensing includes dispensing the fluid as a dissipated
aerosol.
[0062] In accordance with a yet further preferred embodiment of the
present invention the intermittently dispensing includes dispensing
a deodorant. Preferably, the intermittently dispensing includes
dispensing an insecticide. Additionally, the shifting element
shifts to the first operative orientation in response to cooling of
the shifting element by dispensed fluid.
[0063] In accordance with a still further preferred embodiment of
the present invention the shifting element shifts to the second
operative orientation in response to warming of the shifting
element by the ambient outside the dispenser. Preferably, the
method for dispensing a fluid also includes positioning a flow
prevention element of the dispenser to allow the fluid to be
released into the dispenser.
[0064] There is thus provided in accordance with a further
preferred embodiment of the present invention a method for
dispensing a fluid from a container including providing a container
with a container opening, attaching a dispenser to the container
for receiving the fluid from the container, and automatically
intermittently dispensing the fluid from the dispenser using an
intermittent dispensing assembly including a temperature responsive
shifting element, the temperature responsive shifting element being
shiftable in response to temperature changes in the dispenser and
being generally freely supported around a perimeter thereof in the
dispenser.
[0065] There is thus provided in accordance with a further
preferred embodiment of the present invention biasing functionality
for a dispenser intermittently dispensing a fluid in response to
temperature changes, including a plunger, a temperature responsive
shifting element being shiftable in response to temperature changes
and mounted on the plunger, and a spring biasing element engaging
the plunger so as to cause the shifting element to shift
substantially at a selected temperature. Preferably, the shifting
element includes a bimetallic element having first and second
operative orientations depending on the temperature thereof.
Additionally, the bimetallic element includes a bimetallic
disc.
[0066] In accordance with another preferred embodiment of the
present invention the plunger is loosely mounted onto the shifting
element. Alternatively, the plunger is welded to the shifting
element. Additionally or alternatively, the plunger is integrally
formed with the shifting element.
[0067] In accordance with yet another preferred embodiment of the
present invention the biasing spring element includes a spiral
spring. Alternatively, the biasing spring element includes a
helical spring. Alternatively, the biasing spring element includes
a leaf spring. Alternatively, the biasing spring includes a folded
over spring.
[0068] In accordance with still another preferred embodiment of the
present invention the biasing functionality also includes a screw
biased by a rotatably adjustable knob. Preferably, the biasing
spring applies a fixed force to the plunger. Alternatively, the
biasing spring applies a variable force to the plunger.
[0069] In accordance with a further preferred embodiment of the
present invention the rotatably adjustable knob is operative to
select a time interval between sprays. Alternatively, the rotatably
adjustable knob is operative to select a spray initiation
temperature.
[0070] In accordance with a yet further preferred embodiment of the
present invention the biasing functionality also includes
temperature dependent biasing force application functionality.
Preferably, the temperature dependent biasing force application
functionality includes an ambient temperature sensor responsive to
changes in ambient temperature outside the dispenser so as to
selectively bias the shifting element. Additionally, the ambient
temperature sensor includes a bimetallic coil element. Preferably,
the ambient temperature sensor does not communicate with the
fluid.
[0071] In accordance with a still further preferred embodiment of
the present invention biasing functionality also includes a
rotatable cam fixedly mounted onto a shaft rotatable by the ambient
temperature sensor. Preferably, a rotatable cam applies a biasing
force to the biasing spring element. Additionally, the biasing
force increases as ambient temperature outside the dispenser is
lowered and decreases as the temperature rises.
[0072] In accordance with another preferred embodiment of the
present invention the biasing force is minimized when the
temperature is below a minimum operation temperature. Additionally,
the biasing force is minimized when the temperature is above a
maximum operation temperature. Preferably, the temperature above
the maximum operation temperature is below a shift actuating
temperature of the shifting element.
[0073] In accordance with yet another preferred embodiment of the
present invention the rotatable cam includes a cam thickness such
that the rotatable cam applies a suitable biasing force to the
shifting element via the biasing spring element so as to dispense
the fluid substantially within a uniform selected time interval
between sprays. Preferably, the rotatable cam includes a cam
thickness sufficiently small such that the rotatable cam provides a
sufficiently low biasing force to the shifting element so as to
minimize shifting of the shifting element. Additionally, the
shifting element is loosely mounted within the dispenser.
BRIEF DESCRIPTION OF THE DRAWINGS
[0074] The present invention will be more fully understood and
appreciated from the following description taken in conjunction
with the drawings in which:
[0075] FIG. 1 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with a preferred
embodiment of the present invention mounted on a conventional
pressurized aerosol container;
[0076] FIG. 2 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 1, cut along lines II-I in FIG. 1;
[0077] FIGS. 3A & 3B are sectional illustrations of the spray
dispenser of FIG. 1, taken along lines III-III in FIG. 1 in two
operative orientations;
[0078] FIGS. 4A & 4B are sectional illustrations of the spray
dispenser of FIGS. 3A & 3B, taken along lines IVA-IVA and
IVB-IVB respectively, FIG. 4A also including an insert illustrating
an enlarged section taken along lines A-A in FIG. 4A;
[0079] FIGS. 5A, 5B, 5C & 5D are sectional illustrations of the
spray dispenser of FIG. 1, taken along lines V-V in FIG. 1 in four
operative orientations;
[0080] FIG. 6 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with another
preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0081] FIG. 7 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 6, cut along lines VII-VII in FIG.
6;
[0082] FIGS. 8A & 8B are sectional illustrations of the spray
dispenser of FIG. 6, taken along lines VIII-VIII in FIG. 6 in two
operative orientations;
[0083] FIGS. 9A & 9B are sectional illustrations of the spray
dispenser of FIGS. 8A & 8B, taken along lines IXA-IXA and
IXB-IXB respectively, FIG. 9A also including an insert illustrating
an enlarged section taken along lines A-A in FIG. 9A;
[0084] FIGS. 10A & 10B are each a simplified top view
illustration of an embodiment of the spray dispenser of FIG. 6;
[0085] FIG. 11 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with yet another
preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0086] FIG. 12 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 11, cut along lines XII-XII in FIG.
11;
[0087] FIGS. 13A, 13B & 13C are sectional illustrations of the
spray dispenser of FIG. 11, taken along lines XIII-XIII in FIG. 11
in three operative orientations;
[0088] FIGS. 14A & 14B are sectional illustrations of the spray
dispenser of FIGS. 13B & 13C, taken along lines XIVA-XIVA and
XIVB-XIVB respectively, FIG. 14B also including an insert
illustrating an enlarged section taken along lines A-A in FIG.
14B;
[0089] FIGS. 15A & 15B are each a simplified top view
illustration of an embodiment of the spray dispenser of FIG.
11;
[0090] FIG. 16 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with still
another preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0091] FIG. 17 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 16, cut along lines XVII-XVII in FIG.
16;
[0092] FIGS. 18A, 18B & 18C are sectional illustrations of the
spray dispenser of FIG. 16, taken along lines XVIII-XVIII in FIG.
16 in three operative orientations;
[0093] FIGS. 19A & 19B are sectional illustrations of the spray
dispenser of FIGS. 18B & 18C, taken along lines XIXA-XIXA and
XIXB-XIXB respectively, FIG. 19B also including an insert
illustrating an enlarged section taken along lines A-A in FIG.
19B;
[0094] FIG. 20 is a simplified top view illustration of the spray
dispenser of FIG. 16;
[0095] FIG. 21 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with a further
preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0096] FIG. 22 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 21, cut along lines XXII-XXII in FIG.
21;
[0097] FIGS. 23A & 23B are sectional illustrations of the spray
dispenser of FIG. 21, taken along lines XXIII-XXIII in FIG. 21 in
two operative orientations;
[0098] FIGS. 24A & 24B are sectional illustrations of the spray
dispenser of FIGS. 23A & 23B, taken along lines XXIVA-XXIVA and
XXIVB-XXIVB respectively, FIG. 24A also including an insert
illustrating an enlarged section taken along lines A-A in FIG.
24A;
[0099] FIGS. 25A & 25B are each a simplified top view
illustration of an embodiment of the spray dispenser of FIG.
21;
[0100] FIG. 26 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with a yet
further preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0101] FIG. 27 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 26, cut along lines XXVII-XXVII in FIG.
26;
[0102] FIGS. 28A & 28B are sectional illustrations of the spray
dispenser of FIG. 26, taken along lines XXVIII-XXVIII in FIG. 26 in
two operative orientations;
[0103] FIGS. 29A & 29B are sectional illustrations of the spray
dispenser of FIGS. 28A & 28B, taken along lines XXIXA-XXIXA and
XXIXB-XXIXB respectively,
[0104] FIG. 29A also including an insert illustrating an enlarged
section taken along lines A-A in FIG. 29A;
[0105] FIGS. 30A & 30B are each a simplified top view
illustration of an embodiment of the spray dispenser of FIG.
26;
[0106] FIG. 31 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with a still
further preferred embodiment of the present invention mounted on a
conventional pressurized aerosol container;
[0107] FIG. 32 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 31, cut along lines XXXII-XXXII in FIG.
21;
[0108] FIGS. 33A & 33B are sectional illustrations of the spray
dispenser of FIG. 31, taken along lines XXXIII-XXXIII in FIG. 31 in
two operative orientations;
[0109] FIGS. 34A & 34B are sectional illustrations of the spray
dispenser of FIGS. 33A & 33B, taken along lines XXXIVA-XXXIVA
and XXXIVB-XXXIVB respectively, FIG. 34A also including an insert
illustrating an enlarged section taken along lines A-A in FIG.
34A;
[0110] FIG. 35 is a simplified pictorial illustration of a spray
dispenser constructed and operative in accordance with an
additional preferred embodiment of the present invention mounted on
a conventional pressurized aerosol container;
[0111] FIG. 36 is a simplified cut away pictorial illustration of
the spray dispenser of FIG. 35, cut along lines XXXVI-XXXVI in FIG.
35;
[0112] FIGS. 37A, 37B & 37C are sectional illustrations of the
spray dispenser of FIG. 35, taken along lines XXXVII-XXXVII in FIG.
35 in three operative orientations;
[0113] FIGS. 38A & 38B are sectional illustrations of the spray
dispenser of FIGS. 37B & 37C, taken along lines
XXXVIIIA-XXXVIIIA and XXXVIIIB-XXXVIIIB respectively, FIG. 38B also
including an insert illustrating an enlarged section taken along
lines A-A in FIG. 38B;
[0114] FIGS. 39A & 39B are each a simplified top view
illustration of an embodiment of the spray dispenser of FIG.
35;
[0115] FIGS. 40A and 40B are simplified pictorial illustrations of
a spray valve constructed and operative in accordance with a
preferred embodiment of the present invention, in respective closed
and open configurations, wherein a fluid flows against a lower
surface of a deformable element and exits as a fluid spray from a
side outlet;
[0116] FIGS. 41A and 41B are simplified pictorial illustrations of
a spray valve constructed and operative in accordance with another
preferred embodiment of the present invention, in respective closed
and open configurations, wherein the fluid flows against an upper
surface of the deformable element and exits as a fluid spray from a
side outlet;
[0117] FIGS. 42A and 42B are simplified pictorial illustrations of
a spray valve constructed and operative in accordance with yet
another preferred embodiment of the present invention, in
respective closed and open configurations, wherein the fluid flows
against an upper surface of the deformable element and exits as a
fluid spray from an upper outlet;
[0118] FIGS. 43A and 43B are simplified pictorial illustrations of
a spray valve constructed and operative in accordance with another
preferred embodiment of the present invention, in respective closed
and open configurations, wherein the fluid flows against both lower
and upper surfaces of the deformable element and exits as a fluid
spray from a side outlet;
[0119] FIG. 44 is a simplified sectional illustration of a safety
spray valve constructed and operative in accordance with a
preferred embodiment of the present invention;
[0120] FIGS. 45A and 45B are simplified sectional and top-view
illustrations, respectively, of a spray valve constructed and
operative in accordance with still another preferred embodiment of
the present invention, which employs a generally rectangular
deformable element clamped around its perimeter;
[0121] FIGS. 45C and 45D are simplified sectional and top-view
illustrations, respectively, of a spray valve constructed and
operative in accordance with yet another preferred embodiment of
the present invention, which employs a generally rectangular
deformable element clamped at its short ends;
[0122] FIGS. 45E and 45F are simplified sectional illustrations of
the spray valve of FIGS. 45C and 45D, respectively during and after
the deformable element reversing its position;
[0123] FIGS. 46A, 46B and 46C are simplified pictorial
illustrations of a spray valve constructed and operative in
accordance with still another preferred embodiment of the present
invention, in respective full, partially full and nearly empty
configurations, wherein contents of a spray container can be
sprayed without shaking the container; and
[0124] FIG. 46D is a simplified illustration of the spray valve of
FIGS. 46A-46C, with an upper aperture formed in a feed tube, in
accordance with a preferred embodiment of the present
invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0125] Reference is now made to FIG. 1, which is a simplified
pictorial illustration of a spray dispenser 100 constructed and
operative in accordance with a preferred embodiment of the present
invention mounted on a container such as a conventional pressurized
aerosol container. As seen in FIG. 1, the spray dispenser 100
comprises a housing 101, preferably including a bottom housing
portion 102 and a top housing portion 103. Bottom housing portion
102 is preferably configured to define a plurality of radially
distributed inward facing resilient prongs 104, which resiliently
engage a cover 105 of a container opening valve 106 of a
conventional pressurized aerosol container 108.
[0126] Prongs 104 are preferably formed of a resilient material
such as a resilient plastic so as to allow spray dispenser 100 to
resiliently engage container 108 without use of any other
means.
[0127] It is appreciated that spray dispenser 100 may engage
conventional pressurized aerosol container 108 on a top portion of
conventional pressurized aerosol container 108, as described
hereinbelow with reference to FIGS. 21 and 26.
[0128] It is noted that pressurized aerosol container 108 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0129] The housing 101 is provided with an ambient temperature
sensor 110 and with a spray nozzle 112 of any suitable
configuration. The ambient temperature sensor 110 may be mounted
within an apertured housing 114. The ambient temperature sensor
110, preferably thermally isolated from the remainder of the
interior of the housing 101, may be on top housing portion 103, as
seen in FIG. 1, or, alternatively, may be on bottom housing portion
102, or may be in housing 101 and be exposed to the ambient
temperatures via one or more ports. Temperature sensor 110 is
preferably placed such that it does not communicate with fluid
exiting the spray dispenser 100 via spray nozzle 112, nor does it
communicate with fluid passing through a spray release valve,
described hereinbelow in reference to FIG. 2.
[0130] Reference is now made to FIG. 2, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 100 of FIG. 1. An intermittent dispensing valve
comprising a temperature responsive valve opening control element,
in the form of a bimetallic disc 120 of any suitable configuration,
is operative to intermittently actuate spraying of the contents of
the pressurized aerosol container 108.
[0131] Bimetallic disc 120 is constructed of a bimetallic material,
i.e., two dissimilar metals welded or otherwise joined together,
the two metals having different temperature coefficients of
expansion. Due to the different thermal properties of the two
metals, bimetallic disc 120 is in a lowered orientation, in the
sense shown in FIG. 3A, when in a predetermined lowered orientation
shift actuating temperature and reversibly shifts to a raised
orientation in the sense shown in FIG. 3B, upon reaching a
predetermined raised orientation shift actuating temperature.
[0132] It is appreciated that bimetallic disc 120 may be positioned
within spray dispenser 100 in any suitable position, such as the
position shown in FIGS. 1-4B. Alternatively, the bimetallic disc
may be positioned to shift laterally or may be positioned at any
suitable angle within spray dispenser 100.
[0133] It is noted that a bimetallic disc with a relatively low
lowered orientation actuating temperature, will have a longer
cooling duration and hence a longer spray duration and will release
a greater quantity of spray than a bimetallic disc with a
relatively high lowered orientation shift actuating temperature. It
is noted that in embodiments which the fluid is discharged by
shifting the bimetallic disc to a raised spraying orientation, a
bimetallic disc with a relatively high raised orientation actuating
temperature, will have a longer cooling duration and hence a longer
spray duration and will release a greater quantity of spray than a
bimetallic disc with a relatively low raised orientation shift
actuating temperature.
[0134] Additional features of the spray dispenser 100 influence the
spray duration and quantity of released spray, as described
hereinbelow with reference to FIGS. 40A and 40B.
[0135] As seen in FIG. 2, the bimetallic disc 120 is mounted within
an annular recess 121, which is preferably defined in the spray
dispenser 100. The recess 121 is preferably formed with a
circumference that is slightly larger than the circumference of the
bimetallic disc 120 and preferably has a height that is slightly
larger than the height of the bimetallic disc 120. This is to
prevent a clamping force from being applied to the periphery of the
bimetallic disc 120 and thereby allow the bimetallic disc 120 to
readily assume its operative orientation, as will be described
hereinbelow with reference to FIGS. 3A and 3B.
[0136] Intermitted actuation of spraying of the contents of the
pressurized aerosol container 108 is preferably achieved by a
plunger 122, which is mounted onto bimetallic disc 120. The plunger
122 is preferably seated within a slotted ring 123, which overlies
an aperture 124 formed in bimetallic disc 120. As seen in FIG. 2,
the aperture 124 is preferably formed with a circumference that is
slightly larger than the circumference of the plunger 122 so as to
prevent a clamping force from being applied to the bimetallic disc
120 by the plunger 122 and thereby allow the bimetallic disc 120 to
assume its operative orientation, as will be described hereinbelow
with reference to FIGS. 3A and 3B. Alternatively, plunger 122 may
be integrally formed with or welded to bimetallic disc 120.
[0137] A lower portion 125 of plunger 122 preferably engages a ball
126 of a spray release valve 128 of dispenser 100. Plunger 122 also
includes an upper portion 130, which is engaged by a biasing spring
element 132. Biasing spring element 132 is in turn biased to a
variable degree by a biasing force applied by a rotatable cam 134,
which is fixedly mounted onto a shaft 136, which is rotatably
mounted in top housing portion 103. Selective biasing of bimetallic
disc 120 takes place along an axis 138. It is appreciated that
although ball 126 is used in spray release valve 128 any suitable
valve control element may be used, such as stopper 1106 of FIG.
44.
[0138] Rotation of the shaft 136, and thus of the cam 134, is
responsive to the ambient temperature within apertured housing 114.
The temperature sensor 110, here preferably comprised of a
bimetallic coil element 140, is mounted at one end thereof to an
extreme end 141 of the apertured housing 114 and is fixed at an
opposite end thereof to shaft 136. Changes in the ambient
temperature cause the bimetallic coil element 140 to rotate about
an axis 142, perpendicular to axis 138, and thus cause rotation of
shaft 136 about axis 142, thereby producing corresponding rotation
of cam 134, which is in contact with biasing spring element 132,
and thus providing ambient temperature dependent biasing of the
bimetallic disc 120. Alternatively, the temperature sensor 110 may
comprise any other suitable element, such as a spiral spring, a
helical spring or a leaf spring instead of bimetallic coil element
140.
[0139] This ambient temperature dependent biasing provides ambient
temperature independent operation of the spray dispenser 100 so as
to provide uniform time interval between sprays notwithstanding
changes in the ambient temperature outside the spray dispenser 100.
In accordance with a preferred embodiment of the present invention,
the cam 134 is configured so that outside of a predetermined range
of ambient temperatures, spraying of the contents of the
pressurized aerosol container 108 does not take place.
[0140] It is appreciated that the bimetallic coil element 140 may
be selectively positioned by a user in a position which will
provide operation of the spray dispenser 100 generally in
accordance with a user selection, such as within a user selected
time interval between sprays. It is appreciated that a knob (not
shown) may be added to allow the user to turn the bimetallic coil
element 140 to a position which will provide operation of the spray
dispenser 100 generally in accordance with the user selection.
[0141] Reference is now made to FIGS. 3A & 3B, which are
sectional illustrations of the spray dispenser 100 of FIG. 1, taken
along lines III-III in FIG. 1 in respective spraying and
non-spraying operative orientations and to FIGS. 4A and 4B, which
are sectional illustrations of the spray dispenser 100 of FIGS. 3A
& 3B, taken along lines IVA-IVA and IVB-IVB respectively,
wherein FIG. 4A also includes an insert which shows an enlarged
section taken along lines A-A in FIG. 4A. When the spray dispenser
100 of FIGS. 1-3B is initially mounted onto the pressurized aerosol
container 108, a discharge orifice element 150 of the container
opening valve 106 of the pressurized aerosol container 108 is
engaged in a recess 152 at the bottom of bottom housing portion
102. A top surface 154 of the discharge orifice element 150 is
sealingly engaged by an actuator, which is operative to allow fluid
to be released from the interior of the pressurized aerosol
container 108 into the spray dispenser 100, via discharge orifice
element 150. The actuator pushes top surface 154 towards container
opening valve 106, thereby depressing discharge orifice element 150
and thus the container opening valve 106 is maintained in a
substantially open position.
[0142] It is appreciated that the actuator may comprise plunger 122
or a pin operative to form an aperture in the conventional
pressurized aerosol container 108 and thereby allowing fluid flow
from conventional pressurized aerosol container 108 into spray
dispenser 100.
[0143] It is noted that when the ambient temperature outside the
spray dispenser 100 remains within the predetermined range of
ambient temperatures and the temperature inside the spray dispenser
100 is above a predetermined shift actuating temperature, the
bimetallic disc 120 of the spray dispenser 100 is located in a
lowered spraying orientation, as shown in FIG. 3A. The aforesaid
predetermined shift actuating temperature inside spray dispenser
100 corresponds to a predetermined lowered orientation shift
actuating temperature of the bimetallic disc 120. In this lowered
spraying orientation the lower portion 125 of plunger 122, which
extends below bimetallic disc 120, preferably engages ball 126 of
spray release valve 128, forcing it away from its valve seat 157
and thus opening spray release valve 128. Accordingly, release of
pressurized fluid, via discharge orifice element 150, produces a
flow of fluid past ball 126 and around bottom portion 125 of
plunger 122.
[0144] Part of the fluid enters a volume 158 underlying bimetallic
disc 120 and exits through spray nozzle 112. It is appreciated that
spray release valve 128 may be obviated and plunger 122 may
directly engage discharge orifice element 150 so as to allow
pressurized fluid to flow from container opening valve 106 into the
spray dispenser 100.
[0145] Volume 158 is defined by inclined walls 159 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 112 for release during a subsequent discharge of fluid
via spray nozzle 112 to the ambient.
[0146] As seen particularly clearly in the insert in FIG. 4A, part
of the fluid passes around bimetallic disc 120, via passageways 160
formed in housing 101, and expands in a volume 162 lying above
bimetallic disc 120, as shown in FIGS. 3A and 3B, permitting
vaporization of the fluid within volumes 158 and 162 and hence
evaporation of the fluid therein prior to exit of the fluid via
spray nozzle 112. Evaporation of the fluid released from
pressurized aerosol container 108 (FIGS. 1-3B) both above and below
the bimetallic disc 120 provides cooling of both top and bottom
surfaces of bimetallic disc 120 to the raised orientation shift
actuating temperature, causing the bimetallic disc 120 to shift its
orientation from a lowered spraying orientation, as shown in FIG.
3A, to a raised non-spraying orientation, as shown in FIG. 3B. In
this non-spraying orientation the lower portion 125 of the plunger
122 does not dislodge the ball 126 from its valve seat 157 in the
spray release valve 128, thus preventing outflow of fluid
therepast. The fluid pressure of the aerosol in pressurized aerosol
container 108 maintains the ball 126 in seated, sealing engagement
with its valve seat 157, such that spray release valve 128 remains
closed.
[0147] It is noted that when plunger 122 does not dislodge the ball
126 from its valve seat 157, the ball 126 provides safety
protection if any malfunction occurs. The fluid pressure of the
aerosol in pressurized aerosol container 108 forces the ball 126 to
be in sealing engagement with its valve seat 157, such that spray
release valve 128 remains closed, thereby preventing further
spraying of the contents of the pressurized aerosol container 108.
Ball 126 can prevent leaking or overspraying due to a variety of
malfunctions. Malfunctions can possibly occur, for example, due to
knocks or blows to the pressurized aerosol container 108, dropping
the container 108, a gas leak, or the fluid inside the container
108 being spent.
[0148] Following termination of fluid flow from pressurized aerosol
container 108 past bimetallic disc 120, the ambient temperature in
the spray dispenser 100 gradually rises above the aforesaid
predetermined shift actuating temperature, and the bimetallic disc
120 is gradually warmed, until, upon passage of a selected time
interval between sprays to the lowered orientation shift actuating
temperature, the bimetallic disc 120 once again assumes the lowered
spraying orientation shown in FIGS. 3A and 4A.
[0149] It is appreciated that the selected time interval between
sprays is maintained generally uniform irrespective of ambient
temperature variations outside the spray dispenser 100 within the
range of operation of the spray dispenser 100, by virtue of
operation of a temperature dependent biasing force application
functionality described hereinbelow with reference to FIGS. 5A-5D.
More specifically, the operation of the bimetallic disc 120 between
its lowered spraying orientation, as shown in FIG. 3A, and its
raised non-spraying orientation, as shown in FIG. 3B, is naturally,
in the absence of the application of external biasing forces,
dependent on the ambient temperature outside the spray dispenser
100, which determines the rate at which the temperature of the
bimetallic disc 120 changes. In order to reduce the dependency of
the operation of the bimetallic disc 120 on the ambient temperature
outside the spray dispenser 100, the temperature dependent biasing
force application functionality described hereinbelow with
reference to FIGS. 5A-5D is provided so as to apply a variable
biasing force to the plunger 122 urging the bimetallic disc 120 to
assume its lowered spraying orientation, which assumption would, in
the absence of the application of the biasing force, have been
delayed.
[0150] This biasing force increases in inverse proportion to a
decrease in ambient temperature outside the spray dispenser 100,
within a range of temperatures of the spray dispenser 100. Thus,
when the ambient temperature outside the spray dispenser 100
decreases in a way which would otherwise slow the warming of the
bimetallic disc 120 and correspondingly delay its assumption of the
lowered spraying orientation of FIG. 3A the temperature dependent
biasing force application functionality provides a correspondingly
increased biasing force, to the bimetallic disc 120, thus
eliminating the delay that would otherwise have been caused by the
slowed warming, as described hereinbelow with reference to FIGS.
5A-5C.
[0151] It is noted that a relatively large volume 162 is shown in
FIGS. 3A and 3B. This relatively large volume 162 allows for
relatively long residence of the fluid within the spray dispenser
100, producing enhanced vaporization of the fluid thereby reducing
the incidence of liquid droplets and resulting in a dissipated
aerosol spray exiting spray nozzle 112. Should a smaller volume be
provided, as shown in FIGS. 16-20, a relatively greater incidence
of liquid droplets in the aerosol spray can be expected to
occur.
[0152] Reference is now made to FIGS. 5A, 5B, 5C & 5D, which
are sectional illustrations of the spray dispenser 100 of FIG. 1,
taken along lines V-V in FIG. 1 in four non-spraying operative
orientations. FIGS. 5A-5D illustrate the temperature dependent
biasing force application functionality providing automatic
adjustment of the spray dispenser 100 in response to ambient
temperature outside the spray dispenser 100, to preferably provide
operation of the spray dispenser 100 with reduced dependence on the
ambient temperature outside the spray dispenser 100. This ambient
temperature independent operation preferably provides uniform
operation of the spray dispenser 100, such as uniform intervals
between sprays notwithstanding changes in the ambient temperate
outside the spray dispenser 100. As seen in FIG. 5A, the cam 134 is
at a position corresponding to a temperature at the highest range
of the predetermined range of ambient temperatures. Here a
relatively small cam thickness is provided between axis 142 and a
cam contact location 170 on biasing spring element 132, applying a
low biasing force along axis 138 to bimetallic disc 120, via
plunger 122.
[0153] It is noted that biasing spring element 132 is preferably a
folded over leaf spring element, having a portion 172 seated on a
top surface of plunger 122. Preferably, portion 172 of spring
element 132 is formed with an aperture 174 which engages a
protrusion 176 at the top of plunger 122. A bend 178 of biasing
spring element 132 is seated in a recess 180 defined in the
interior of top housing portion 103 and an end 182 of spring
element 132 engages an interior wall 184 of top housing portion
103. Both bend 178 and end 182 are restricted in their lateral
motion, while end 182 is relatively unrestricted in its motion
parallel to axis 138. Cam contact location 170 preferably is
defined by a protrusion 186 formed in spring element 132 between
the bend 178 and the end 182.
[0154] Alternatively, the spring element 132 may comprise any
suitable spring element, such as a spiral spring or a helical
spring.
[0155] It is appreciated that in order that ambient temperature
independent operation of the spraying device may occur, as
described hereinabove with reference to FIGS. 3A-5B, in uniformity
of interval between sprays, the higher the ambient temperature, the
smaller must be the biasing force on the bimetallic disc 120.
[0156] A typical ambient temperature range of operation for the
spraying device is between 20 and 30 degrees centigrade. In such an
example, FIG. 5A represents operation at approximately 30 degrees
centigrade.
[0157] Accordingly, when the ambient temperature outside the spray
dispenser 100 decreases, as seen in FIG. 5B, for example to 25
degrees centigrade, the cam 134 is at a position corresponding to a
temperature at the middle range of the predetermined range of
ambient temperatures outside the spray dispenser 100. Here an
intermediate cam thickness is provided between axis 142 and cam
contact location 170 on biasing spring element 132, applying an
intermediate biasing force along axis 138 to bimetallic disc 120,
via plunger 122.
[0158] Similarly, when the ambient temperature outside the spray
dispenser 100 decreases further, as seen in FIG. 5C, for example to
20 degrees centigrade, the cam 134 is at a position corresponding
to a temperature at the lower range of the predetermined range of
ambient temperatures outside the spray dispenser 100. Here a
maximum thickness is provided between axis 142 and cam contact
location 170 on biasing spring element 132, applying a maximum
biasing force along axis 138 to bimetallic disc 120, via plunger
122.
[0159] Reference is now made to FIG. 5D, which illustrates a
situation where the ambient temperature outside the spray dispenser
100 is outside the range of operation of the spray dispenser 100,
being either greater than the maximum operation temperature or less
than the minimum operation temperature. Here, the cam 134 is at a
position where the cam thickness between axis 142 and cam contact
location 170 on biasing spring element 132 is sufficiently small
such that it provides either no force or a sufficiently low biasing
force to the bimetallic disc 120, such that the bimetallic disc 120
is retained in place but does not shift to a spray orientation.
[0160] Preferably, a bimetallic disc with a shift actuating
temperature relatively higher than the maximum operation
temperature of the range of operation of the spray dispenser 100 is
employed so as to eliminate or minimize shifting of the bimetallic
disc when the ambient temperature outside the spray dispenser 100
is greater than the maximum operation temperature.
[0161] Reference is now made to FIG. 6, which is a simplified
pictorial illustration of a spray dispenser 200 constructed and
operative in accordance with another preferred embodiment of the
present invention and mounted on a conventional pressurized aerosol
container. As seen in FIG. 6, the spray dispenser 200 comprises a
housing 201, preferably including a bottom housing portion 202 and
a top housing portion 203. Bottom housing portion 202 is preferably
configured to define a plurality of radially distributed inward
facing resilient prongs 204, which resiliently engage a cover 205
of a container opening valve 206 of a conventional pressurized
aerosol container 208.
[0162] It is noted that pressurized aerosol container 208 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0163] Mounted onto top housing portion 203 is a spray nozzle 212
of any suitable configuration. It is appreciated that a plurality
of spray nozzles may be provided.
[0164] Reference is now made to FIG. 7, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 200 of FIG. 6. An intermittent dispensing assembly
comprising a temperature responsive shifting element in the form of
a bimetallic disc 220 of any suitable configuration is operative to
intermittently actuate spraying of the contents of the pressurized
aerosol container 208. This is preferably achieved by a plunger
222, which is loosely mounted onto bimetallic disc 220 and is
preferably seated within a slotted ring 223. Alternatively, plunger
222 may be integrally formed with or welded to bimetallic disc
220.
[0165] It is noted that the bimetallic disc 220 is preferably
loosely mounted within the spray dispenser 200 so as to allow the
bimetallic disc 220 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 200, as will be described hereinbelow.
[0166] A lower portion 224 of plunger 222 preferably engages a ball
226 of a spray release valve 228. Plunger 222 also includes an
upper portion 230, which is engaged by a biasing spring element
232. Biasing spring element 232 is in turn biased by a screw 234
extending below an upper portion 236 of top housing portion 203 and
is threadably mounted within top housing portion 203. Selective
biasing of bimetallic disc 220 takes place along an axis 238.
[0167] It is noted that biasing spring element 232 is preferably a
folded over leaf spring element, having a first portion 252 seated
on a top surface of plunger 222. Preferably, first portion 252 of
spring element 232 is formed with an aperture 254 which engages a
protrusion 256 at the top of plunger 222 while a second portion 258
of spring element 232 is formed with an aperture 260 which engages
a protrusion 262 at the bottom of screw 234.
[0168] Upper portion 236 of top housing portion 203 is formed with
a rotatably adjustable knob 264. User rotation of rotatably
adjustable knob 264, and thus of the screw 234 causes a fixed force
to be applied to the biasing spring element 232 thus enabling a
user to select a user defined time interval between sprays, or,
alternatively, to select a user defined spray initiation
temperature. The force applied to the biasing spring element 232 is
predetermined to provide operation of the spray dispenser 200
corresponding to the user selection. The biasing spring element 232
applies a fixed force along axis 238 to bimetallic disc 220, via
plunger 222, thus providing for the spray dispenser 200 to
generally operate within the selected time interval between sprays,
as shown in FIG. 10A, or, alternatively, for the spray dispenser
200 to dispense the fluid generally at the spray initiation
temperature, as shown in FIG. 10B.
[0169] As seen in FIG. 7, the rotation of the knob 264 is limited
by a limiting pin 266 seated within a circular slot 268 formed in
upper portion 236. The limiting pin 266 limits user rotation of the
knob 264 and thus of the screw 234 so as to prevents the biasing
spring element 232 from applying a force to the bimetallic disc
220, which will cause the bimetallic disc 220 to shift outside the
range of operation of the spray dispenser 200.
[0170] Reference is now made to FIGS. 8A & 8B, which are
sectional illustrations of the spray dispenser 200 of FIG. 6, taken
along lines VIII-VIII in FIG. 6 in respective spraying and
non-spraying operative orientations and to FIGS. 9A and 9B, which
are sectional illustrations of the spray dispenser 200 of FIGS. 8A
& 8B, taken along lines IXA-IXA and IXB-IXB respectively,
wherein FIG. 9A also includes an insert which shows an enlarged
section taken along lines A-A in FIG. 9A. When the spray dispenser
200 of FIGS. 6-8B is initially mounted onto the pressurized aerosol
container 208, a discharge orifice element 270 of the container
opening valve 206 of the pressurized aerosol container 208 is
engaged in a recess 272 formed at the bottom of bottom housing
portion 202. A top surface 274 of the discharge orifice element 270
is sealingly engaged by an actuator operative to allow fluid to be
released from the interior of the pressurized aerosol container 208
into the spray dispenser 200, via discharge orifice element 270.
The actuator, preferably defined by a shoulder 276 of recess 272,
pushes top surface 274 towards container opening valve 206, thereby
depressing discharge orifice element 270 and thus the container
opening valve 206 is maintained in a substantially open
position.
[0171] It is noted that when the ambient temperatures are above a
predetermined shift actuating temperature the bimetallic disc 220
of the spray dispenser 200 is located in a lowered spraying
orientation, as seen in FIG. 8A. In this lowered spraying
orientation the lower portion 224 of plunger 222, which extends
below bimetallic disc 220, preferably engages ball 226 of spray
release valve 228, forcing it away from its valve seat 277 and thus
opening spray release valve 228. Accordingly, release of
pressurized fluid, via discharge orifice element 270, produces a
flow of fluid past ball 226 and around bottom portion 224 of
plunger 222. Part of the fluid enters a volume 278 surrounding
bimetallic disc 220 and exits through spray nozzle 212. It is
appreciated that spray release valve 228 may be obviated and
plunger 222 may directly engage discharge orifice element 270 so as
to allow pressurized fluid flow from container opening valve 206
into the spray dispenser 200.
[0172] Volume 278 is defined by inclined walls 259 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 212 for release during a subsequent discharge of fluid
via spray nozzle 212 to the ambient.
[0173] As seen particularly clearly in the insert in FIG. 9A, part
of the fluid passes around bimetallic disc 220, via passageways 280
formed in housing 201, and expands in an upper portion 282 of
volume 278 lying above bimetallic disc 220, as shown in FIGS. 8A
and 8B, permitting vaporization of the fluid within volume 278 and
hence evaporation of the fluid therein prior to exit of the fluid
via spray nozzle 212. Evaporation of the fluid released from
pressurized aerosol container 208 (FIGS. 6-8B) both above and below
the bimetallic disc 220 provides cooling of both top and bottom
surfaces of bimetallic disc 220 to a raised orientation shift
actuating temperature, causing it to shift its orientation from a
lowered spraying orientation, as shown in FIG. 8A, to a raised
non-spraying orientation, as shown in FIG. 8B.
[0174] In this non-spraying orientation, the lower portion 224 of
the plunger 222 does not dislodge the ball 226 from its valve seat
277 in the spray release valve 228, thus preventing outflow of
fluid therepast. The fluid pressure of the aerosol in pressurized
aerosol container 208 maintains the ball 226 in seated, sealing
engagement, with its valve seat 277, such that spray release valve
228 remains closed.
[0175] Following termination of fluid flow from pressurized aerosol
container 208 past bimetallic disc 220, the ambient temperature in
the spray dispenser 200 gradually rises above the predetermined
shift actuating temperature, and the bimetallic disc 220 is
gradually warmed to a lowered orientation shift actuating
temperature, until the bimetallic disc 220 once again assumes the
lowered spraying orientation shown in FIGS. 8A and 9A.
[0176] It is noted that by rotation of rotatably adjustable knob
264, as described with reference to FIG. 7, a biasing force is
applied to the bimetallic disc 220. The biasing force allows the
bimetallic disc 220 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0177] It is noted that the selected time interval between sprays
and the selected spray initiation temperature are dependent on
ambient temperature variations within the range of operation of the
spray dispenser 200. More specifically, the operation of the
bimetallic disc 220 between its lowered spraying orientation, as
shown in FIG. 8A, and its raised non-spraying orientation, as shown
in FIG. 8B, is naturally dependent on the ambient temperature,
which determines the rate at which the temperature of the
bimetallic disc changes. Thus, when the ambient temperature
decreases the warming of the bimetallic disc 220 is slowed and
correspondingly its assumption of the lowered spraying orientation
of FIG. 8A is delayed.
[0178] It is further noted that a relatively large upper portion
282 of volume 278 is shown in FIGS. 8A and 8B. This relatively
large upper portion 282 of volume 278 allows for relatively long
residence of the fluid within the spray dispenser 200, producing
enhanced vaporization and enhanced dissipation thereof and reducing
the incidence of liquid droplets in the aerosol spray exiting spray
nozzle 212. Should a smaller upper portion 282 of volume 278 be
provided, a relatively greater incidence of liquid droplets in the
aerosol spray can be expected to occur.
[0179] Reference is now made to FIGS. 10A & 10B, which are each
a simplified top view illustration of an embodiment of the spray
dispenser 200 of FIG. 6. As seen in FIG. 10A, a user may rotate a
rotatably adjustable knob, designated by reference numeral 264, so
as to select a time interval between sprays, as described
hereinabove with reference to FIG. 7. Alternatively, as shown in
FIG. 10B, a user may rotate a rotatably adjustable knob, here
designated by reference numeral 290, so as to select a spray
initiation temperature in a manner similar to that described
hereinabove with reference to knob 264 in FIG. 7.
[0180] Reference is now made to FIG. 11, which is a simplified
pictorial illustration of a spray dispenser 300 constructed and
operative in accordance with yet another preferred embodiment of
the present invention and mounted on a conventional pressurized
aerosol container. As seen in FIG. 11, the spray dispenser 300
comprises a housing 301, preferably including a bottom housing
portion 302 and a top housing portion 303. Bottom housing portion
302 is preferably configured to define a plurality of radially
distributed inward facing resilient prongs 304, which resiliently
engage a cover 305 of a container opening valve 306 of a
conventional pressurized aerosol container 308.
[0181] It is noted that pressurized aerosol container 308 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0182] Mounted onto top housing portion 303 is a spray nozzle 312
of any suitable configuration. It is appreciated that a plurality
of spray nozzles may be provided.
[0183] As seen in an insert of FIG. 11, the prongs 304 are provided
on a bottom portion thereof with inward facing legs 314, which
engage the pressurized aerosol container 308 at a contact location
316 adjacent to an outward protruding portion of cover 305 of the
container opening valve 306 so as to prevent removal of the spray
dispenser 300 from the pressurized aerosol container 308.
[0184] Prongs 304 and legs 314 are preferably formed of a resilient
material, such as a resilient plastic so as to allow spray
dispenser 300 to resiliently engage container 308 without use of
rings or other tightening means.
[0185] Reference is now made to FIG. 12, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 300 of FIG. 11. A bimetallic element of any suitable
configuration, such as a bimetallic disc 320, is operative to
intermittently actuate spraying of the contents of the pressurized
aerosol container 308. This is preferably achieved by a plunger
322, which is loosely mounted onto bimetallic disc 320 and is
preferably seated within a slotted ring 323. Alternatively, plunger
322 may be integrally formed with or welded to bimetallic disc
320.
[0186] It is noted that the bimetallic disc 320 is preferably
loosely mounted within the spray dispenser 300 so as to allow the
bimetallic disc 320 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 300, as will be described hereinbelow.
[0187] A lower portion 324 of plunger 322 preferably engages a ball
326 of a spray release valve 328. Plunger 322 also includes an
upper portion 330, which is engaged by a biasing spring element
332, preferably in the form of a coiled spring. Biasing spring
element 332 is in turn biased by a screw 334 extending below an
upper portion 336 of top housing portion 303 and is threadably
mounted within top housing portion 303. Selective biasing of
bimetallic disc 320 takes place along an axis 338.
[0188] Upper portion 336 of top housing portion 303 is formed with
a rotatably adjustable knob 364. User rotation of rotatably
adjustable knob 364, and thus of the screw 334, causes a fixed
force to be applied to the biasing spring element 332 thus enabling
the user to select a user defined time interval between sprays, or,
alternatively, to select a user defined spray initiation
temperature. The force applied to the biasing spring element 332 is
predetermined to provide operation of the spray dispenser 300
corresponding to the user selection. The biasing spring element 332
applies a fixed force along axis 338 to bimetallic disc 320, via
plunger 322, thus providing for the spray dispenser 300 to
generally operate within the selected time interval between sprays,
as shown in FIG. 15A, or, alternatively, for the spray dispenser
300 to dispense the fluid generally at the spray initiation
temperature as shown in FIG. 15B. A limiting pin 366 is provided to
limit user rotation of the knob 364, and thus of the screw 334,
thereby preventing the biasing spring element 332 from applying an
excessive force that may cause the bimetallic disc 320 to shift
outside the range of operation of the spray dispenser 300.
[0189] Reference is now made to FIGS. 13A, 13B and 13C which are
sectional illustrations of the spray dispenser 300 of FIG. 11,
taken along lines XIII-XIII in FIG. 11 in three operative
orientations and to FIGS. 14A and 14B, which are sectional
illustrations of the spray dispenser 300 of FIGS. 13B & 13C,
taken along lines XIVA-XIVA and XIVB-XIVB respectively, wherein
FIG. 14B also includes an insert which shows an enlarged section
taken along lines A-A in FIG. 14B.
[0190] As seen in FIG. 13A, a flow prevention element 368, formed
with a recess 369, is operative to retain ball 326 of spray release
valve 328 within its valve seat 370 so as to prevent release of
aerosol spray from pressurized aerosol container 308, for example,
during initial mounting of the spray dispenser 300 onto the
pressurized aerosol container 308.
[0191] When the spray dispenser 300 of FIGS. 11-13C is initially
mounted onto the pressurized aerosol container 308 flow prevention
element 368 is positioned, as shown in FIG. 13A, to prevent fluid
flow to spray release valve 328. As seen in FIGS. 13B and 13C, flow
prevention element 368 is positioned to allow fluid flow from
pressurized aerosol container 308 to spray release valve 328. A
discharge orifice element 371 of the container opening valve 306 of
the pressurized aerosol container 308 is engaged in a recess 372
formed at the bottom of bottom housing portion 302. A top surface
374 of the discharge orifice element 371 is sealingly engaged by an
actuator operative to allow fluid to be released from the interior
of the pressurized aerosol container 308 into the spray dispenser
300, via discharge orifice element 371. The actuator, preferably
defined by a shoulder 376 of recess 372, pushes top surface 374
towards container opening valve 306, thereby depressing discharge
orifice element 371 and thus the container opening valve 306 is
maintained in a substantially open position.
[0192] Flow prevention element 368 is operative to be positioned by
a user in a position which prevents fluid from reaching the spray
release valve 328 and thus prevents fluid from exiting spray nozzle
312, as seen in FIG. 13A. Flow prevention element 368 may also be
positioned to prevent fluid from reaching the spray release valve
328 during shipment and storage thereby preventing unwanted fluid
discharge from spray dispenser 300.
[0193] The flow prevention element 368 operates as an on-off switch
and allows the spray dispenser 300 to be mounted on the pressurized
aerosol container 308 in accordance with methods not conveniently
preformed by a user.
[0194] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 320
of the spray dispenser 300 is located in a lowered spraying
orientation, as seen in FIG. 13C. In this lowered spraying
orientation, lower portion 324 of plunger 322, which extends below
bimetallic disc 320, preferably engages ball 326 of spray release
valve 328, forcing it away from its valve seat 370 and thus opening
spray release valve 328. Accordingly, release of pressurized fluid,
via discharge orifice element 371, produces a flow of fluid past
ball 326 and around bottom portion 324 of plunger 322. Part of the
fluid enters a volume 378 underlying bimetallic disc 320 and exits
through spray nozzle 312. It is appreciated that spray release
valve 328 may be obviated and plunger 322 may directly engage
discharge orifice element 371 so as to allow pressurized fluid flow
from container opening valve 306 into the spray dispenser 300.
[0195] Volume 378 is defined by inclined walls 379 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 312 for release during a subsequent discharge of fluid
via spray nozzle 312 to the ambient.
[0196] As seen particularly clearly in the insert in FIG. 14B, part
of the fluid passes around bimetallic disc 320, via passageways
380, formed in housing 301, and expands in a volume 382 lying above
bimetallic disc 320, as shown in FIGS. 13A, 13B and 13C permitting
vaporization of the fluid within volumes 378 and 382 and hence
evaporation of the fluid therein prior to exit of the fluid via
spray nozzle 312. Evaporation of the fluid released from
pressurized aerosol container 308 (FIGS. 11-13C), both above and
below the bimetallic disc 320, provides cooling of both top and
bottom surfaces of the bimetallic disc 320 to a raised orientation
shift actuating temperature, causing it to shift its orientation
from a lowered spraying orientation, as shown in FIG. 13C to a
raised non-spraying orientation, as shown in FIG. 13B. In this
non-spraying orientation, the lower portion 324 of the plunger 322,
does not dislodge the ball 326 from its valve seat 370 in the spray
release valve 328, thus preventing outflow of fluid therepast. The
fluid pressure of the aerosol in pressurized aerosol container 308
maintains the ball 326 in seated, sealing engagement, with its
valve seat 370, such that spray release valve 328 remains
closed.
[0197] It is noted that by rotation of rotatably adjustable knob
364, as described with reference to FIG. 12, a biasing force is
applied to the bimetallic disc 320. The biasing force allows the
bimetallic disc 320 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0198] Following termination of fluid flow from pressurized aerosol
container 308 past bimetallic disc 320, the ambient temperature in
the spray dispenser 300 gradually rises above the predetermined
shift actuating temperature and the bimetallic disc 320 is
gradually warmed to a lowered orientation shift actuating
temperature, until the bimetallic disc 320 once again assumes the
lowered spraying orientation shown in FIGS. 13C and 14B.
[0199] It is noted that the selected time interval between sprays
and the selected spray initiation temperature are dependent on
ambient temperature variations within the range of operation of the
spray dispenser 300. More specifically, the operation of the
bimetallic disc 320 between its lowered spraying orientation, as
shown in FIG. 13C, and its raised non-spraying orientation, as
shown in FIG. 13B, is naturally dependent on the ambient
temperature, which determines the rate at which the temperature of
the bimetallic disc 320 changes. Thus, when the ambient temperature
decreases, the warming of the bimetallic disc 320 is slowed and
correspondingly its assumption of the lowered spraying orientation
of FIG. 13C is delayed.
[0200] It is further noted that a relatively large volume 382 is
shown in FIGS. 13A, 13B and 13C. This relatively large volume
allows for relatively long residence of the fluid within the spray
dispenser 300, producing enhanced vaporization and enhanced
dissipation thereof and reducing the incidence of liquid droplets
in the aerosol spray exiting spray nozzle 312. Should a smaller
volume 382 be provided, a relatively greater incidence of liquid
droplets in the aerosol spray can be expected to occur.
[0201] Reference is now made to FIGS. 15A & 15B, which are each
a simplified top view illustration of an embodiment of the spray
dispenser 300 of FIG. 11. As seen in FIG. 15A, a user may rotate a
rotatably adjustable knob, designated by reference numeral 364, so
as to select a time interval between sprays, as described
hereinabove with reference to FIG. 12. Alternatively, as shown in
FIG. 15B, a user may rotate a rotatably adjustable knob, here
designated by reference numeral 390, so as to select a spray
initiation temperature, in a manner similar to that described
hereinabove with reference to knob 364 in FIG. 12.
[0202] Reference is now made to FIG. 16, which is a simplified
pictorial illustration of a spray dispenser 400 constructed and
operative in accordance with still another preferred embodiment of
the present invention and mounted on a conventional pressurized
aerosol container. As seen in FIG. 16, the spray dispenser 400
comprises a housing 401, preferably including a bottom housing
portion 402 and a top housing portion 403. Bottom housing portion
402 is preferably configured to define a plurality of radially
distributed inward facing resilient prongs 404, which resiliently
engage a cover 405 of a container opening valve 406 of a
conventional pressurized aerosol container 408.
[0203] It is noted that pressurized aerosol container 408 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0204] Mounted onto top housing portion 403 is a spray nozzle 412
of any suitable configuration. The spray dispenser 400 is also
provided with a thermometer 414 so as to indicate to a user the
ambient temperature outside the spray dispenser 400. It is
appreciated that a plurality of spray nozzles may be provided.
[0205] Reference is now made to FIG. 17, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 400 of FIG. 16. A bimetallic disc 420 of any suitable
configuration is operative to intermittently actuate spraying of
the contents of the pressurized aerosol container 408. This is
preferably achieved by a plunger 422, which is loosely mounted onto
bimetallic disc 420 and is preferably seated within a slotted ring
423. Alternatively, plunger 422 may be integrally formed with or
welded to bimetallic disc 420.
[0206] It is noted that the bimetallic disc 420 is preferably
loosely mounted within the spray dispenser 400 so as to allow the
bimetallic disc 420 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 400, as will be described hereinbelow.
[0207] A lower portion 424 of plunger 422 preferably defines a pin
426 of a spray release valve 428. Plunger 422 also includes an
upper portion 430, which is engaged by a biasing spring element
432, which is preferably in the form of a coiled spring. Biasing
spring element 432 is in turn biased by a screw 434 extending below
an upper portion 436 of top housing portion 403. Screw 434 is
threadably mounted within top housing portion 403. Selective
biasing of bimetallic disc 420 takes place along an axis 438.
[0208] Upper portion 436 of top housing portion 403 is formed with
a rotatably adjustable knob 464. User rotation of rotatably
adjustable knob 464, and thus of the screw 434, causes a fixed
force to be applied to the biasing spring element 432 thus enabling
the user to select a user defined spray initiation temperature. The
force applied to the biasing spring element 432 is predetermined to
provide operation of the spray dispenser 400 corresponding to the
user selection. The biasing spring element 432 applies a fixed
force along axis 438 to bimetallic disc 420, via plunger 422, thus
providing for the spray dispenser 400 to dispense the fluid
generally at the spray initiation temperature, as illustrated
hereinbelow in reference to FIG. 20.
[0209] A limiting pin 466 is provided to limit user rotation of the
knob 464, and thus of the screw 434, thereby preventing the biasing
spring element 432 from applying an excessive force to the
bimetallic disc 420 that may cause the bimetallic disc 420 to shift
outside the range of operation of the spray dispenser 400.
[0210] Reference is now made to FIGS. 18A, 18B & 18C, which are
sectional illustrations of the spray dispenser 400 of FIG. 16,
taken along lines XVIII-XVIII in FIG. 16 in three operative
orientations and to FIGS. 19A and 19B, which are sectional
illustrations of the spray dispenser 400 of FIGS. 18B & 18C,
taken along lines XIXA-XIXA and XIXB-XIXB respectively, wherein
FIG. 19B also includes an insert which shows an enlarged section
taken along lines A-A in FIG. 19B.
[0211] As seen in FIG. 18A, a flow prevention element 468 also seen
in FIG. 16 and formed with a half-cylindrical engagement portion
469, is operative to engage a shoulder of plunger 422 so as to
retain pin 426 within its valve seat 470 so as to prevent release
of aerosol spray from pressurized aerosol container 408, for
example, during initial mounting of the spray dispenser 400 onto
the pressurized aerosol container 408.
[0212] When the spray dispenser 400 of FIGS. 16-18C is initially
mounted onto the pressurized aerosol container 408 flow prevention
element 468 is positioned, as shown in FIG. 18A, to prevent fluid
flow to spray release valve 428. As seen in FIGS. 18B and 18C, flow
prevention element 468 is positioned to allow fluid flow from
pressurized aerosol container 408 to spray release valve 428. A
discharge orifice element 471 of the container opening valve 406 of
the pressurized aerosol container 408 is engaged in a recess 472
formed at the bottom of bottom housing portion 402. A top surface
473 of the discharge orifice element 471 is sealingly engaged by an
actuator operative to allow fluid to be released from the interior
of the pressurized aerosol container 408 into the spray dispenser
400, via discharge orifice element 471. The actuator, preferably
defined by a shoulder 474 of recess 472, pushes top surface 473
towards container opening valve 406, thereby depressing discharge
orifice element 471 and thus the container opening valve 406 is
maintained in a substantially open position.
[0213] Flow prevention element 468 is operative to be positioned by
a user in a position which prevents fluid from reaching the spray
release valve 428 and thus prevents fluid from exiting spray nozzle
412, as seen in FIG. 18A. Flow prevention element 468 may also be
positioned to prevent fluid from reaching the spray release valve
428 during shipment and storage thereby preventing unwanted fluid
discharge from spray dispenser 400.
[0214] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 420
of the spray dispenser 400 is located in a raised spraying
orientation, as seen in FIG. 18C. In the raised spraying
orientation it is seen that pin 426 is preferably dislodged from an
aperture 475 defined by an O-ring 476, which is seated in a recess
defined in bottom housing portion 402, thus opening spray release
valve 428. Accordingly, release of pressurized fluid, via discharge
orifice element 471, produces a flow of fluid past aperture 475 and
around bottom portion 424 of plunger 422. Part of the fluid enters
a volume 478 underlying bimetallic disc 420 and exits through spray
nozzle 412. It is appreciated that spray release valve 428 may be
obviated and plunger 422 may directly engage discharge orifice
element 471 so as to allow pressurized fluid flow from container
opening valve 406 into the spray dispenser 400.
[0215] Volume 478 is defined by inclined walls 479 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 412 for release during a subsequent discharge of fluid
via spray nozzle 412 to the ambient.
[0216] As seen particularly clearly in the insert in FIG. 19B, part
of the fluid passes around bimetallic disc 420, via passageways 480
formed in housing 401, and expands in a volume 482 lying above
bimetallic disc 420, as shown in FIGS. 18A, 18B and 18C, permitting
vaporization of the fluid within volumes 478 and 482 and hence
evaporation of the fluid therein prior to exit of the fluid via
spray nozzle 412. Evaporation of the fluid released from
pressurized aerosol container 408, both above and below the
bimetallic disc 420, provides cooling of both top and bottom
surfaces of bimetallic disc 420 to a lowered orientation shift
actuating temperature, causing it to shift its orientation from a
raised spraying orientation, as shown in FIG. 18C, to a lowered
non-spraying orientation, as shown in FIG. 18B. In this
non-spraying orientation, the pin 426 of the plunger 422 is not
dislodged from aperture 475, thus preventing outflow of fluid
therepast.
[0217] Following termination of fluid flow from pressurized aerosol
container 408 past bimetallic disc 420, the ambient temperature in
the spray dispenser 400 gradually rises above the predetermined
shift actuating temperature, and the bimetallic disc 420 is
gradually warmed to a raised orientation shift actuating
temperature, until the bimetallic disc 420 once again assumes the
raised spraying orientation shown in FIGS. 18C and 19B.
[0218] It is noted that by rotation of rotatably adjustable knob
464, as described with reference to FIG. 17, a biasing force is
applied to the bimetallic disc 420. The biasing force allows the
bimetallic disc 420 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0219] It is noted that the selected spray initiation temperature
is dependent on ambient temperature variations within the range of
operation of the spray dispenser 400. More specifically, the
operation of the bimetallic disc 420 between its raised spraying
orientation, as shown in FIG. 18C, and its lowered non-spraying
orientation, as shown in FIG. 18B, is naturally dependent on the
ambient temperature, which determines the rate at which the
temperature of the bimetallic disc changes. Thus, when the ambient
temperature decreases, the warming of the bimetallic disc 420 is
slowed and correspondingly its assumption of the raised spraying
orientation of FIG. 18C is delayed.
[0220] It is further noted that a relatively small volume 482 is
shown in FIGS. 18A, 18B and 18C. This relatively small volume
allows for relatively short residence of the fluid within the spray
dispenser 400, increasing the incidence of liquid droplets in the
aerosol spray exiting spray nozzle 412.
[0221] Reference is now made to FIG. 20, which is a simplified top
view illustration of the spray dispenser 400 of FIG. 16. As seen in
FIG. 20, a user may rotate rotatably adjustable knob 464 so as to
select a spray initiation temperature.
[0222] Reference is now made to FIG. 21, which is a simplified
pictorial illustration of a spray dispenser 500 constructed and
operative in accordance with a further preferred embodiment of the
present invention and mounted on a conventional pressurized aerosol
container. As seen in FIG. 21, the spray dispenser 500 comprises a
housing 501, preferably including a bottom housing portion 502 and
a top housing portion 503. Bottom housing portion 502 is preferably
provided with a fastening element 504, which resiliently engages a
top portion of a conventional pressurized aerosol container 508
having a container opening valve 510.
[0223] It is noted that pressurized aerosol container 508 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0224] Mounted onto top housing portion 503 is a spray nozzle 512
of any suitable configuration. It is appreciated that a plurality
of spray nozzles may be provided.
[0225] Reference is now made to FIG. 22, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 500 of FIG. 21. A bimetallic disc 520 of any suitable
configuration is operative to intermittently actuate spraying of
the contents of the pressurized aerosol container 508. This is
preferably achieved by a plunger 522, which is loosely mounted onto
bimetallic disc 520 and is preferably seated within a slotted ring
523. Alternatively, plunger 522 may be integrally formed with or
welded to bimetallic disc 520.
[0226] It is noted that the bimetallic disc 520 is preferably
loosely mounted within the spray dispenser 500 so as to allow the
bimetallic disc 520 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 500, as will be described hereinbelow.
[0227] A lower portion 524 of plunger 522 preferably engages a ball
526 of a spray release valve 528. Plunger 522 also includes an
upper portion 530, which is engaged by a biasing spring element
532, preferably in the form of a coiled spring. Biasing spring
element 532 is in turn biased by a screw 534 extending below an
upper portion 536 of top housing portion 503. Screw 534 is
threadably mounted within top housing portion 503. Selective
biasing of bimetallic disc 520 takes place along an axis 538.
[0228] Upper portion 536 of top housing portion 503 is formed with
a rotatably adjustable knob 544. User rotation of rotatably
adjustable knob 544, and thus of the screw 534, causes a fixed
force to be applied to the biasing spring element 532 thus enabling
the user to select a user defined time interval between sprays or,
alternatively, to select a user defined spray initiation
temperature. The force applied to the biasing spring element 532 is
predetermined to provide operation of the spray dispenser 500
corresponding to the user selection. The biasing spring element 532
applies a fixed force along axis 538 to bimetallic disc 520, via
plunger 522, thus providing for the spray dispenser 500 to
generally operate within the selected time interval between sprays
as shown in FIG. 25A, or, alternatively, for the spray dispenser
500 to dispense the fluid generally at the spray initiation
temperature, as shown in FIG. 25B.
[0229] A limiting pin 546 is provided to limit user rotation of the
knob 544 and thus of the screw 534, thereby preventing the biasing
spring element 532 from applying an excessive force to the
bimetallic disc 520 that may cause the bimetallic disc 520 to shift
outside the range of operation of the spray dispenser 500.
[0230] Top housing portion 503 is threadably mounted onto bottom
housing portion 502. Top housing portion 503 and bottom housing
portion 502 jointly define an internal volume 550 operative to
relatively thermally isolate the bimetallic disc 520 from the
ambient so as to provide enhanced ambient temperature independent
operation of the spray dispenser 500 within a predetermined range
of ambient temperatures.
[0231] Reference is now made to FIGS. 23A & 23B, which are
sectional illustrations of the spray dispenser 500 of FIG. 21,
taken along lines XXIII-XXIII in FIG. 21 in respective spraying and
non-spraying operative orientations and to FIGS. 24A and 24B, which
are sectional illustrations of the spray dispenser 500 of FIGS. 23A
& 23B, taken along lines XXIVA-XIVA and XXIVB-XXIVB
respectively, wherein FIG. 24A also includes an insert which shows
an enlarged section taken along lines A-A in FIG. 24A. As seen in
FIG. 23A, a mounting element 552 of the spray dispenser 500 of
FIGS. 21-23B is preferably mounted onto a discharge orifice element
554 of the pressurized aerosol container 508. When the spray
dispenser 500 is initially mounted onto the pressurized aerosol
container 508, the discharge orifice element 554 of the container
opening valve 510 of the pressurized aerosol container 508 is
engaged in a recess 572 formed in mounting element 552.
[0232] A top surface 574 of the discharge orifice element 554 is
sealingly engaged by an actuator operative to allow fluid to be
released from the interior of the pressurized aerosol container 508
into the spray dispenser 500, via discharge orifice element 554 and
a conduit 576 formed in mounting element 552. The actuator,
preferably defined by a shoulder 575 of recess 572, pushes top
surface 574 towards container opening valve 510, thereby depressing
discharge orifice element 554 and thus the container opening valve
506 is maintained in a substantially open position.
[0233] It is appreciated that mounting element 552 may accommodate
different sizes of discharge orifice elements. Furthermore,
mounting element 552 may be a removable mounting element which
comprises a gripping portion, such as a gripping portion 577
constructed and operative for easy removal of mounting element 552
to be replaced by another mounting element. Alternatively, mounting
element 552 may be obviated.
[0234] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 520
of the spray dispenser 500 is located in a lowered spraying
orientation, as seen in FIG. 23A. In this lowered spraying
orientation, lower portion 524 of plunger 522, which extends below
bimetallic disc 520, preferably engages ball 526 of spray release
valve 528, forcing it away from its valve seat and thus opening
spray release valve 528. Accordingly, release of pressurized fluid,
via discharge orifice element 554, produces a flow of fluid past
ball 526 and around bottom portion 524 of plunger 522. Part of the
fluid enters a volume 578 underlying bimetallic disc 520 and exits
through spray nozzle 512.
[0235] Volume 578 is defined by inclined walls 579 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 512 for release during a subsequent discharge of fluid
via spray nozzle 512 to the ambient.
[0236] As seen particularly clearly in the insert in FIG. 24A, part
of the fluid passes around bimetallic disc 520, via passageways 580
formed in the top housing portion 503, and expands in a volume 582
lying above bimetallic disc 520, as shown in FIGS. 23A and 23B,
permitting vaporization of the fluid within volumes 578 and 582 and
hence evaporation of the fluid therein prior to exit of the fluid
via spray nozzle 512. Evaporation of the fluid released from
pressurized aerosol container 508 (FIGS. 21-23B), both above and
below the bimetallic disc 520, provides cooling of both top and
bottom surfaces of bimetallic disc 520 to a raised orientation
shift actuating temperature, causing it to shift its orientation
from a lowered spraying orientation, as shown in FIG. 23A to a
raised non-spraying orientation, as shown in FIG. 23B. In this
non-spraying orientation, the lower portion 524 of the plunger 523,
does not dislodge the ball 526 from its valve seat in the spray
release valve 528, thus preventing outflow of fluid therepast. The
fluid pressure of the aerosol in pressurized aerosol container 508
maintains the ball 526 in seated, sealing engagement, with its
valve seat, such that spray release valve 528 remains closed.
[0237] Following termination of fluid flow from pressurized aerosol
container 508 past bimetallic disc 520, the ambient temperature in
the spray dispenser 500 gradually rises above the predetermined
shift actuating temperature and the bimetallic disc 520 is
gradually warmed to a lowered orientation shift actuating
temperature, until the bimetallic disc 520 once again assumes the
lowered spraying orientation shown in FIGS. 23A and 24A.
[0238] It is noted that by rotation of rotatably adjustable knob
544, as described with reference to FIG. 22, a biasing force is
applied to the bimetallic disc 520. The biasing force allows the
bimetallic disc 520 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0239] It is noted that although internal volume 550 is operative
to relatively thermally isolate the bimetallic disc 520 from the
ambient, so as to reduce the influence of the ambient temperature
changes on the operation of the spray dispenser 500, the selected
time interval between sprays and the selected spray initiation
temperature are nevertheless somewhat dependent on ambient
temperature variations within the range of operation of the spray
dispenser 500. More specifically, the operation of the bimetallic
disc 520 between its lowered spraying orientation, as shown in FIG.
23A, and its raised non-spraying orientation, as shown in FIG. 23B,
is naturally dependent on the ambient temperature, which determines
the rate at which the temperature of the bimetallic disc changes.
Thus, when the ambient temperature decreases, the warming of the
bimetallic disc 520 is slowed and correspondingly its assumption of
the lowered spraying orientation of FIG. 23A is delayed.
[0240] Reference is now made to FIGS. 25A & 25B, which are each
a simplified top view illustration of an embodiment of the spray
dispenser 500 of FIG. 21. As seen in FIG. 25A, a user may rotate a
rotatably adjustable knob, designated by reference numeral 544, so
as to select a time interval between sprays, as described
hereinabove with reference to FIG. 22. Alternatively, as shown in
FIG. 25B, a user may rotate a rotatably adjustable knob, here
designated by reference numeral 590, so as to select a spray
initiation temperature in a manner similar to that described
hereinabove with reference to knob 544 in FIG. 22.
[0241] Reference is now made to FIG. 26, which is a simplified
pictorial illustration of a spray dispenser 600 constructed and
operative in accordance with a yet further preferred embodiment of
the present invention and mounted on a conventional pressurized
aerosol container. As seen in FIG. 26, the spray dispenser 600
comprises a housing 601, preferably including a bottom housing
portion 602 and a top housing portion 603. Bottom housing portion
602 is preferably provided with a fastening element 604, which
resiliently engages a top portion of a conventional pressurized
aerosol container 608 having a container opening valve 610.
[0242] It is noted that pressurized aerosol container 608 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0243] Mounted onto top housing portion 603 is a spray nozzle 612
of any suitable configuration. It is appreciated that a plurality
of spray nozzles may be provided.
[0244] Reference is now made to FIG. 27, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 600 of FIG. 26. A bimetallic disc 620 of any suitable
configuration is operative to intermittently actuate spraying of
the contents of the pressurized aerosol container 608. This is
preferably achieved by a plunger 622, which is loosely mounted onto
bimetallic disc 620 and is preferably seated within a slotted ring
623. Alternatively, plunger 622 may be integrally formed with or
welded to bimetallic disc 620.
[0245] It is noted that the bimetallic disc 620 is preferably
loosely mounted within the spray dispenser 600 so as to allow the
bimetallic disc 620 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 600, as will be described hereinbelow.
[0246] A lower portion 624 of plunger 622 preferably defines a pin
626 of a spray release valve 628. Plunger 622 also includes an
upper portion 630, which is engaged by a biasing spring element
632, preferably in the form of a coiled spring. Biasing spring
element 632 is in turn biased by a screw 634 extending below an
upper portion 636 of top housing portion 603 and is threadably
mounted within top housing portion 603. Selective biasing of
bimetallic disc 620 takes place along an axis 638.
[0247] Upper portion 636 of top housing portion 603 is formed with
a rotatably adjustable knob 644. User rotation of rotatably
adjustable knob 644, and thus of the screw 634, causes a fixed
force to be applied to the biasing spring element 632 thus enabling
the user to select a user defined interval between sprays or,
alternatively, to select a user defined spray initiation
temperature. The force applied to the biasing spring element 632 is
predetermined to provide operation of the spray dispenser 600
corresponding to the user selection. The biasing spring element 632
applies a fixed force along axis 638 to bimetallic disc 620, via
plunger 622, thus providing for the spray dispenser 600 to
generally operate within the selected time interval between sprays,
as shown in FIG. 30A, or, alternatively, for the spray dispenser
600 to dispense the fluid generally at the spray initiation
temperature, as shown in FIG. 30B.
[0248] A limiting pin 646 is provided to limit user rotation of the
knob 644 and thus of the screw 634, thereby preventing the biasing
spring element 632 from applying an excessive force to the
bimetallic disc 620 that may cause the bimetallic disc 620 to shift
outside the range of operation of the spray dispenser 600.
[0249] Top housing portion 603 is threadably mounted onto bottom
housing portion 602. Top housing portion 603 and bottom housing
portion 602 jointly define an internal volume 650 operative to
relatively thermally isolate the bimetallic disc 620 from the
ambient so as to provide enhanced ambient temperature independent
operation of the spray dispenser 600 within a predetermined range
of ambient temperatures.
[0250] Reference is now made to FIGS. 28A and 28B, which are
sectional illustrations of the spray dispenser 600 of FIG. 26,
taken along lines XXVIII-XXVIII in FIG. 26 in two operative
orientations and to FIGS. 29A and 29B, which are sectional
illustrations of the spray dispenser 600 of FIGS. 28A & 28B,
taken along lines XXIXA-XXIXA and XXIXB-XXIXB respectively, wherein
FIG. 29A also includes an insert which shows an enlarged section
taken along lines A-A in FIG. 29A.
[0251] As seen in FIG. 28A, a mounting element 652 of the spray
dispenser 600 of FIGS. 26-28B is preferably mounted onto a
discharge orifice element 654 of the pressurized aerosol container
608. When the spray dispenser 600 is initially mounted onto the
pressurized aerosol container 608, the discharge orifice element
654 of the container opening valve 610 of the pressurized aerosol
container 608 is engaged in a recess 672 formed in mounting element
652.
[0252] A top surface 673 of the discharge orifice element 654 is
sealingly engaged by an actuator operative to allow fluid to be
released from the interior of the pressurized aerosol container 608
into the spray dispenser 600, via discharge orifice element 654 and
a conduit 676 formed in mounting element 652. The actuator,
preferably defined by a shoulder 674 of recess 672, pushes top
surface 673 towards container opening valve 610, thereby depressing
discharge orifice element 654 and thus the container opening valve
610 is maintained in a substantially open position.
[0253] It is appreciated that mounting element 652 may accommodate
different sizes of discharge orifice elements. Furthermore,
mounting element 652 may be a removable mounting element which
comprises a gripping portion, such as a gripping portion 677
constructed and operative for easy removal of mounting element 652
to be replaced by another mounting element. Alternatively, mounting
element 652 may be obviated.
[0254] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 620
of the spray dispenser 600 is located in a raised spraying
orientation, as seen in FIG. 28A. In the raised spraying
orientation it is seen that pin 626 is preferably dislodged from an
aperture 678, preferably defined by an O-ring 680, which is seated
in housing 601 and thus opening spray release valve 628.
Accordingly, release of pressurized fluid, via discharge orifice
element 654, produces a flow of fluid past aperture 678 and around
bottom portion 624 of plunger 622. Part of the fluid enters a
volume 682 underlying bimetallic disc 620 and exits through spray
nozzle 612.
[0255] Volume 682 is defined by inclined walls 683 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 612 for release during a subsequent discharge of fluid
via spray nozzle 612 to the ambient.
[0256] As seen particularly clearly in the insert in FIG. 29A, part
of the fluid passes around bimetallic disc 620, via passageways 684
formed in the top housing portion 603, and expands in a volume 686
lying above bimetallic disc 620, as shown in FIGS. 28A and 28B,
permitting vaporization of the fluid within volumes 682 and 686 and
hence evaporation of the fluid therein prior to exit of the fluid
via spray nozzle 612. Evaporation of the fluid released from
pressurized aerosol container 608, both above and below the
bimetallic disc 620, provides cooling of both top and bottom
surfaces of bimetallic disc 620 to a lowered orientation shift
actuating temperature, causing it to shift its orientation from a
raised spraying orientation, as shown in FIG. 28A, to a lowered
non-spraying orientation, as shown in FIG. 28B. In this
non-spraying orientation, the pin 626 of the plunger 622 is not
dislodged from aperture 678 thus preventing outflow of fluid
therepast.
[0257] Following termination of fluid flow from pressurized aerosol
container 608 past bimetallic disc 620, the ambient temperature in
the spray dispenser 600 gradually rises above the predetermined
shift actuating temperature, and the bimetallic disc 620 is
gradually warmed to a raised orientation shift actuating
temperature, until the bimetallic disc 620 once again assumes the
raised spraying orientation shown in FIGS. 28A and 29A.
[0258] It is noted that by rotation of rotatably adjustable knob
644, as described with reference to FIG. 27, a biasing force is
applied to the bimetallic disc 620. The biasing force allows the
bimetallic disc 620 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0259] It is noted that although internal volume 650 is operative
to relatively thermally isolate the bimetallic disc 620 from the
ambient, so as to reduce the influence of the ambient temperature
changes on the operation of the spray dispenser 600, the selected
time interval between sprays and the selected spray initiation
temperature are nevertheless somewhat dependent on ambient
temperature variations within the range of operation of the spray
dispenser 600. More specifically, the operation of the bimetallic
disc 620 between its raised spraying orientation, as shown in FIG.
28A, and its lowered non-spraying orientation, as shown in FIG.
28B, is naturally dependent on the ambient temperature, which
determines the rate at which the temperature of the bimetallic disc
changes. Thus, when the ambient temperature decreases, the warming
of the bimetallic disc 620 is slowed and correspondingly its
assumption of the raised spraying orientation of FIG. 28A is
delayed.
[0260] Reference is now made to FIGS. 30A & 30B, which are each
a simplified top view illustration of an embodiment of the spray
dispenser 600 of FIG. 26. As seen in FIG. 30A, a user may rotate a
rotatably adjustable knob, designated by reference numeral 644, so
as to select a time interval between sprays, as described
hereinabove with reference to FIG. 27. Alternatively, as shown in
FIG. 30B, a user may rotate a rotatably adjustable knob, here
designated by reference numeral 690, so as to select a spray
initiation temperature, in a manner similar to that described
hereinabove with reference to knob 644 in FIG. 27.
[0261] Reference is now made to FIG. 31, which is a simplified
pictorial illustration of a spray dispenser 700 constructed and
operative in accordance with a still further preferred embodiment
of the present invention and mounted on a conventional pressurized
aerosol container. As seen in FIG. 31, the spray dispenser 700
comprises a housing 701, preferably including a bottom housing
portion 702 and a top housing portion 703. Bottom housing portion
702 is preferably configured to define a plurality of radially
distributed inward facing resilient prongs 704, which resiliently
engage a cover 705 of a container opening valve 706 of a
conventional pressurized aerosol container 708.
[0262] It is noted that pressurized aerosol container 708 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0263] Mounted onto top housing portion 703 is a spray nozzle 712
of any suitable configuration. It is appreciated that a plurality
of spray nozzles may be provided.
[0264] Reference is now made to FIG. 32, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 700 of FIG. 31. A bimetallic disc 720 of any suitable
configuration is operative to intermittently actuate spraying of
the contents of the pressurized aerosol container 708. This is
preferably achieved by a plunger 722, which is loosely mounted onto
bimetallic disc 720 and is preferably seated within a slotted ring
723. Alternatively, plunger 722 may be integrally formed with or
welded to bimetallic disc 720.
[0265] It is noted that the bimetallic disc 720 is preferably
loosely mounted within the spray dispenser 700 so as to allow the
bimetallic disc 720 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 700, as will be described hereinbelow.
[0266] A lower portion 724 of plunger 722 preferably engages a ball
726 of a spray release valve 728. Plunger 722 also includes an
upper portion 730. Biasing of bimetallic disc 720 takes place along
an axis 738.
[0267] Alternatively, spray release valve 728 may comprise a pin of
the type shown in FIGS. 17-18C and 27-28B. It is appreciated that
the spray dispenser 700 may be provided with a flow prevention
element, as shown in FIGS. 12-13B and designated by reference
numeral 368 or as shown in FIGS. 17-18C and designated by reference
numeral 468.
[0268] Reference is now made to FIGS. 33A & 33B, which are
sectional illustrations of the spray dispenser 700 of FIG. 31,
taken along lines XIII-XIII in FIG. 31 in respective spraying and
non-spraying operative orientations and to FIGS. 34A and 34B, which
are sectional illustrations of the spray dispenser 700 of FIGS. 33A
& 33B, taken along lines XXXIVA-XXXIVA and XXXIVB-XXXIVB
respectively, wherein FIG. 34A also includes an insert which shows
an enlarged section taken along lines A-A in FIG. 34A.
[0269] When the spray dispenser 700 of FIGS. 31-33B is initially
mounted onto the pressurized aerosol container 708, a discharge
orifice element 770 of the container opening valve 706 of the
pressurized aerosol container 708 is engaged in a recess 772 formed
at the bottom of bottom housing portion 702. A top surface 774 of
the discharge orifice element 770 is sealingly engaged by an
actuator operative to allow fluid to be released from the interior
of the pressurized aerosol container 708 into the spray dispenser
700, via discharge orifice element 770. The actuator, preferably
defined by a shoulder 776 of recess 772, pushes top surface 774
towards container opening valve 706, thereby depressing discharge
orifice element 770 and thus the container opening valve 706 is
maintained in a substantially open position.
[0270] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 720
of the spray dispenser 700 is located in a lowered spraying
orientation, as seen in FIG. 33A. In this lowered spraying
orientation, lower portion 724 of plunger 722, which extends below
bimetallic disc 720, preferably engages ball 726 of spray release
valve 728, forcing it away from its valve seat 777 and thus opening
spray release valve 728. Accordingly, release of pressurized fluid,
via discharge orifice element 770, produces a flow of fluid past
ball 726 and around bottom portion 724 of plunger 722. Part of the
fluid enters a volume 778 underlying bimetallic disc 720 and exits
through spray nozzle 712. It is appreciated that spray release
valve 728 may be obviated and plunger 722 may directly engage
discharge orifice element 770 so as to allow pressurized fluid flow
from container opening valve 706 into the spray dispenser 700.
[0271] Volume 778 is defined by inclined walls 779 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 712 for release during a subsequent discharge of fluid
via spray nozzle 712 to the ambient.
[0272] It is noted that surfaces of volume 778 may be made of a
cold retaining material, such as aluminum, so as to delay the
warming of the bimetallic disc 720 thereby lengthening the
intervals between sprays.
[0273] As seen particularly clearly in the insert in FIG. 34A, part
of the fluid passes around bimetallic disc 720, via passageways 780
formed in housing 701, and expands in a volume 782 lying above
bimetallic disc 720, as shown in FIGS. 33A and 33B, permitting
vaporization of the fluid within volumes 778 and 782 and hence
evaporation of the fluid therein prior to exit of the fluid via
spray nozzle 712. Evaporation of the fluid released from
pressurized aerosol container 708 (FIGS. 31-33B) both above and
below the bimetallic disc 720 provides cooling of both top and
bottom surfaces of bimetallic disc 720 to a raised orientation
shift actuating temperature, causing it to shift its orientation
from a lowered spraying orientation, as shown in FIG. 33A, to a
raised non-spraying orientation, as shown in FIG. 33B. In this
non-spraying orientation, the lower portion 724 of the plunger 722
does not dislodge the ball 726 from its valve seat 777 in the spray
release valve 728, thus preventing outflow of fluid there past. The
fluid pressure of the aerosol in pressurized aerosol container 708
maintains the ball 726 in seated, sealing engagement, with its
valve seat 777, such that spray release valve 728 remains
closed.
[0274] Following termination of fluid flow from pressurized aerosol
container 708 past bimetallic disc 720, the ambient temperature in
the spray dispenser 700 gradually rises above the predetermined
shift actuating temperature and gradually warms the bimetallic disc
720 to a lowered orientation shift actuating temperature, until the
bimetallic disc 720 once again assumes the lowered spraying
orientation shown in FIGS. 33A and 34A.
[0275] It is noted that a time interval between sprays is dependent
on ambient temperature variations within the range of operation of
the spray dispenser 700. More specifically, the operation of the
bimetallic disc 720 between its lowered spraying orientation, as
shown in FIG. 33A, and its raised non-spraying orientation, as
shown in FIG. 33B, is naturally dependent on the ambient
temperature, which determines the rate at which the temperature of
the bimetallic disc changes. Thus, when the ambient temperature
decreases, the warming of the bimetallic disc 720 is slowed and,
correspondingly, its assumption of the lowered spraying orientation
of FIG. 33A is delayed.
[0276] It is further noted that a relatively large volume 782 is
shown in FIGS. 33A and 33B. This relatively large volume allows for
relatively long residence of the fluid within the spray dispenser
700, producing enhanced vaporization and enhanced dissipation
thereof and reducing the incidence of liquid droplets in the
aerosol spray exiting spray nozzle 712. Should a smaller volume 782
be provided, a relatively greater incidence of liquid droplets in
the aerosol spray can be expected to occur.
[0277] It is appreciated that the spray dispenser 700 shown
hereinabove in FIGS. 1-5B and 11-34B may be transferred from one
pressurized aerosol container to another.
[0278] Reference is now made to FIG. 35, which is a simplified
pictorial illustration of a spray dispenser 800 constructed and
operative in accordance with yet another preferred embodiment of
the present invention and mounted on a pressurized aerosol
container. As seen in FIG. 35, the spray dispenser 800 comprises a
housing 801, preferably including a bottom housing portion 802 and
a top housing portion 803. Spray dispenser 800 preferably is
mounted on a pressurized aerosol container 808 comprising a dip
tube 810.
[0279] It is noted that pressurized aerosol container 808 may
contain any of a large variety of fluids including, for example,
air, oxygen, fuels, water, oils, sterilizers, cleaning materials,
insecticides and deodorants.
[0280] Mounted onto spray dispenser 800 is a spray nozzle 812 of
any suitable configuration. It is appreciated that a plurality of
spray nozzles may be provided. A flow prevention element 814
preferably is mounted onto bottom portion 802
[0281] Reference is now made to FIG. 36, which is a simplified
pictorial illustration of principal operative elements of the spray
dispenser 800 of FIG. 35. A bimetallic disc 820 of any suitable
configuration is operative to intermittently actuate spraying of
the contents of the pressurized aerosol container 808. This is
preferably achieved by a plunger 822, which is loosely mounted onto
bimetallic disc 820 and is preferably seated within a slotted ring
823. Alternatively, plunger 822 may be integrally formed with or
welded to bimetallic disc 820.
[0282] It is noted that the bimetallic disc 820 is preferably
loosely mounted within the spray dispenser 800 so as to allow the
bimetallic disc 820 to assume its appropriate operational
orientation corresponding to temperature changes within the spray
dispenser 800, as will be described hereinbelow.
[0283] A lower portion 824 of plunger 822 preferably engages a ball
826 of a spray release valve 828. Alternatively, spray release
valve 828 may comprise a pin of the type shown in FIGS. 17-18C and
27-28B. Plunger 822 also includes an upper portion 830, which is
engaged by a biasing spring element 832, preferably in the form of
a coiled spring. Biasing spring element 832 is in turn biased by a
screw 834 extending below an upper portion 836 of top housing
portion 803 and is threadably mounted within top housing portion
803. Selective biasing of bimetallic disc 820 takes place along an
axis 838.
[0284] Upper portion 836 of top housing portion 803 is formed with
a rotatably adjustable knob 864. User rotation of rotatably
adjustable knob 864, and thus of the screw 834, causes a fixed
force to be applied to the biasing spring element 832 thus enabling
the user to select a user defined time interval between sprays, or,
alternatively, to select a user defined spray initiation
temperature. The force applied to the biasing spring element 832 is
predetermined to provide operation of the spray dispenser 800
corresponding to the user selection. The biasing spring element 832
applies a fixed force along axis 838 to bimetallic disc 820, via
plunger 822, thus providing for the spray dispenser 800 to
generally operate within the selected time interval between sprays,
as shown in FIG. 39A, or, alternatively, for the spray dispenser
800 to dispense the fluid generally at the spray initiation
temperature, as shown in FIG. 39B.
[0285] A limiting pin 866 is provided to limit user rotation of the
knob 864, and thus of the screw 834, thereby preventing the biasing
spring element 832 from applying an excessive force that may cause
the bimetallic disc 820 to shift outside the range of operation of
the spray dispenser 800.
[0286] As seen in FIG. 36, an extension 870 of spray dispenser 800
is sealingly mounted in an aperture 872, which is formed in
pressurized aerosol container 808 and is defined by a top portion
of dip tube 810. A recess 874 is formed in extension 870 and is in
fluid communication with dip tube 810 and a conduit 876 formed in
bottom housing portion 802 of spray dispenser 800. Recess 874 is
preferably formed with a relatively small circumference so as to
allow extension 870 to be stably mounted within aperture 872.
[0287] It is appreciated that the extension 870 may be sealingly
inserted into dip tube 810 by applying techniques known in the art
for inserting valve stems in a conventional aerosol container.
[0288] It is appreciated that in the present embodiment, described
with reference to FIGS. 35-39B, a container opening valve may be
obviated.
[0289] Reference is now made to FIGS. 37A, 37B and 37C which are
sectional illustrations of the spray dispenser 800 of FIG. 35,
taken along lines XXXVII-XXXVII in FIG. 35 in three operative
orientations and to FIGS. 38A and 38B, which are sectional
illustrations of the spray dispenser 800 of FIGS. 37B & 37C,
taken along lines XXXVIIIA-XXXVIIIA and XXXVIIIB-XXXVIIIB
respectively, wherein FIG. 38B also includes an insert which shows
an enlarged section taken along lines A-A in FIG. 38B.
[0290] Flow prevention element 814, formed with a recess 880 on an
end portion thereof, is operative, when positioned as seen in FIG.
37A, to retain ball 826 of spray release valve 828 within its valve
seat 882 so as to prevent release of aerosol spray from pressurized
aerosol container 808.
[0291] Flow prevention element 814 is operative to be positioned by
a user in a position which prevents fluid from reaching the spray
release valve 828 and thus prevents fluid from exiting spray nozzle
812, as seen in FIG. 37A. Flow prevention element 814 may also be
positioned to prevent fluid from reaching the spray release valve
828 during shipment and storage thereby preventing unwanted fluid
discharge from spray dispenser 800.
[0292] When flow prevention element 814 is positioned as seen in
FIGS. 37B and 37C fluid is allowed to flow from pressurized aerosol
container 808 into spray dispenser 800, via a fluid passageway 884,
which is defined by dip tube 810, recess 874 and conduit 876, to
spray release valve 828.
[0293] It is noted that when ambient temperatures are above a
predetermined shift actuating temperature, the bimetallic disc 820
of the spray dispenser 800 is located in a lowered spraying
orientation, as seen in FIG. 37C. In this lowered spraying
orientation, lower portion 824 of plunger 822, which extends below
bimetallic disc 820, preferably engages ball 826 of spray release
valve 828, forcing it away from its valve seat 882 and thus opening
spray release valve 828. Accordingly, release of pressurized fluid,
via passageway 884, produces a flow of fluid past ball 826 and
around bottom portion 824 of plunger 822. Part of the fluid enters
a volume 888 underlying bimetallic disc 820 and exits through spray
nozzle 812.
[0294] Volume 888 is defined by inclined walls 889 on a bottom
portion thereof so as to retain remaining fluid which did not exit
spray nozzle 812 for release during a subsequent discharge of fluid
via spray nozzle 812 to the ambient.
[0295] As seen particularly clearly in the insert in FIG. 38B, part
of the fluid passes around bimetallic disc 820, via passageways
890, formed in housing 801, and expands in a volume 892 lying above
bimetallic disc 820, as shown in FIGS. 37A, 37B and 37C permitting
vaporization of the fluid within volumes 888 and 892 and hence
evaporation of the fluid therein prior to exit of the fluid via
spray nozzle 812. Evaporation of the fluid released from
pressurized aerosol container 808 (FIGS. 35-37C), both above and
below the bimetallic disc 820, provides cooling of both top and
bottom surfaces of the bimetallic disc 820 to a raised orientation
shift actuating temperature, causing it to shift its orientation
from a lowered spraying orientation, as shown in FIG. 37C to a
raised non-spraying orientation, as shown in FIG. 37B. In this
non-spraying orientation, the lower portion 824 of the plunger 822,
does not dislodge the ball 826 from its valve seat 882 in the spray
release valve 828, thus preventing outflow of fluid therepast. The
fluid pressure of the aerosol in pressurized aerosol container 808
maintains the ball 826 in seated, sealing engagement, with its
valve seat 882, such that spray release valve 828 remains
closed.
[0296] It is noted that a relatively large volume 892 is shown in
FIGS. 37A, 37B and 37C. This relatively large volume allows for
relatively long residence of the fluid within the spray dispenser
800, producing enhanced vaporization and enhanced dissipation
thereof and reducing the incidence of liquid droplets in the
aerosol spray exiting spray nozzle 812. Should a smaller volume 892
be provided, a relatively greater incidence of liquid droplets in
the aerosol spray can be expected to occur.
[0297] Following termination of fluid flow from pressurized aerosol
container 808 past bimetallic disc 820, the ambient temperature in
the spray dispenser 800 gradually rises above the predetermined
shift actuating temperature and the bimetallic disc 820 is
gradually warmed to a lowered orientation shift actuating
temperature, until the bimetallic disc 820 once again assumes the
lowered spraying orientation shown in FIGS. 37C and 38B.
[0298] It is noted that by rotation of rotatably adjustable knob
864, as described with reference to FIG. 36, a biasing force is
applied to the bimetallic disc 820. The biasing force allows the
bimetallic disc 820 to shift its orientation at a shift actuating
temperature in accordance with a user selection.
[0299] It is noted that the selected time interval between sprays
and the selected spray initiation temperature are dependent on
ambient temperature variations within the range of operation of the
spray dispenser 800. More specifically, the operation of the
bimetallic disc 820 between its lowered spraying orientation, as
shown in FIG. 37C, and its raised non-spraying orientation, as
shown in FIG. 37B, is naturally dependent on the ambient
temperature, which determines the rate at which the temperature of
the bimetallic disc 820 changes. Thus, when the ambient temperature
decreases, the warming of the bimetallic disc 820 is slowed and
correspondingly its assumption of the lowered spraying orientation
of FIG. 37C is delayed.
[0300] Reference is now made to FIGS. 39A & 39B, which are each
a simplified top view illustration of an embodiment of the spray
dispenser 800 of FIG. 35. As seen in FIG. 39A, a user may rotate a
rotatably adjustable knob, designated by reference numeral 864, so
as to select a time interval between sprays, as described
hereinabove with reference to FIG. 36. Alternatively, as shown in
FIG. 39B, a user may rotate a rotatably adjustable knob, here
designated by reference numeral 896, so as to select a spray
initiation temperature in a manner similar to that described
hereinabove with reference to knob 864 in FIG. 36.
[0301] It is appreciated that a temperature dependent biasing force
application functionality described with reference to FIG. 5A-5D
may be employed to bias the spring biasing element 832 in place of
rotation of rotatably adjustable knob 864 or 896.
[0302] Reference is now made to FIGS. 40A and 40B, which illustrate
a spray valve 1010 constructed and operative in accordance with a
preferred embodiment of the present invention.
[0303] Spray valve 1010 preferably includes a dispenser body 1012
with an expansion chamber 1014 formed therein. Dispenser body 1012
may be sealingly connected to a container 1016 containing a fluid
1018, such as by means of an elastic metal ring 1024 which tightly
fits into a groove 1026 formed at a bottom end of dispenser body
1012, in the same or similar manner as described in PCT patent
application PCT/IL98/00618 and corresponding U.S. Pat. No.
6,540,155. Fluid 1018 may be any kind of fluid, suitable for
storing in container 1016 (under pressure or not), such as, but not
limited to, deodorants, pesticides, fungicides, foodstuffs, paint,
repellents, and the like. Container 1016 may be any kind of
pressurized or non-pressurized container used in any of the
applications described in PCT patent application PCT/IL98/00618.
Container has a nozzle 1017 extending therefrom (FIG. 40A).
[0304] Dispenser body 1012 may include thermal insulation 1019,
such as a plastic liner (single or multiple layers of insulation),
or such as being constructed like a vacuum flask or with an
insulating air pocket, for example.
[0305] A fluid outlet 1020 is preferably formed in dispenser body
1012 and is in fluid communication with expansion chamber 1014. In
the embodiment of FIGS. 40A and 40B, fluid outlet 1020 is located
on a side of dispenser body 1012.
[0306] A plunger 1022 is preferably arranged for sliding motion in
dispenser body 1012 between a first position (the position shown in
FIG. 40A) and a second position (the position shown in FIG. 40B).
Plunger 1022 can be brought into fluid communication with the fluid
1018 contained in container 1016 in a variety of manners. In the
illustrated embodiment, an adapter 1028 is provided formed with a
lower aperture 1029 which snugly fits over nozzle 1017 of container
1016. Different adapters 1028 with differently sized apertures 1029
may be provided for connection with any size nozzle 1017. An O-ring
1030 may be provided for sealing the fluid connection between
adapter 1028 and container nozzle 1017. Adapter 1028 is formed with
a longitudinal bore 1031.
[0307] Adapter 1028 fits in a bore 1032 formed in dispenser body
1012. Another O-ring 1034 may be provided for fluidly sealing
adapter 1028 with respect to bore 1032. An upper portion 1036 of
adapter 1028 abuts against a guide member 1038. Preferably a third
O-ring 1040 is provided to seal the fluid connection between
adapter 1028 and guide member 1038. Guide member 1038 is formed
with a bore 1042 in which slides plunger 1022. A lower portion of
guide member 1038 is formed with a counterbore 1044 which extends
from bore 1042.
[0308] In accordance with one preferred embodiment of the present
invention, plunger 1022 is constructed as a hollow needle with a
hole 1046 formed in a lower portion thereof and a hole 1048 formed
at an upper end thereof (the hollow being shown in dashed lines in
FIG. 40A). Alternatively, plunger 1022 may be formed as a
non-hollow needle. A stop 1050 may be affixed to the upper end of
plunger 1022 which limits the downward travel (in the sense of FIG.
40A) of plunger 1022. In the case of a hollow-needle plunger 1022,
an O-ring 1052 and O-ring cover 1054 may be provided for fluidly
sealing the upper end of plunger 1022 with guide member 1038 and
stop 1050. In the case of a non-hollow plunger 1022, stop 1050,
O-ring 1052 and O-ring cover 1054 are preferably omitted.
[0309] The skilled artisan will appreciate that the foregoing
description of plunger 1022 and the various seals is just one
example of countless other configurations of constructing and
sealing plunger 1022, and that any configuration of plunger 1022 is
within the scope of the present invention.
[0310] A deformable element 1056 is preferably mounted just above
expansion chamber 1014 in dispenser body 1012. Deformable element
1056 may have any shape, such as circular, rectangular or square,
for example. In the case of a circular, disc-shaped element,
deformable element 1056 is not clamped around its periphery.
Instead, deformable element 1056 is preferably freely supported
around its periphery. In the embodiment illustrated in FIGS. 40A
and 40B, a plug 1053 preferably snugly fits in dispenser body 1012
and is preferably fastened thereto with a retaining ring 1047. The
periphery of deformable element 1056 is placed, but not clamped,
between a lower extension 1043 of plug 1053 and an O-ring 1058. As
deformable element 1056 bends downwards or upwards (in the sense of
FIG. 40A), deformable element 1056 merely rests on or slightly
squeezes O-ring 1058, but there is generally no clamping force on
deformable element 1056. The purpose of O-ring 1058 is to seal the
expansion chamber 1014 which is situated below deformable element
1056 in the embodiment of FIGS. 40A and 40B. (In another
embodiment, shown in FIG. 44, the expansion chamber is on both
sides of the deformable element, and there is no need for an
O-ring.) Thus deformable element 1056 is free to snap from one
position to another without any clamping forces. Unlike the prior
art, deformable element 1056 does not have the disadvantage of
being sensitive to slight misalignments or variations in size, and
does not accidentally reverse its movement.
[0311] There is preferably a gap 1051 that extends radially between
the peripheral edge of deformable element 1056 and the inner
perimeter of expansion chamber 1014. Gap 1051 ensures that there
are no radially-directed stresses acting upon deformable element
1056. In the case of a non-hollow plunger 1022 that is attached to
deformable element 1056, gap 1051 enables plunger 1022 to
self-center relative to stop 1050 and O-ring 1052 without any
radially-directed forces acting upon deformable element 1056. The
presence of gap 1051 relaxes manufacturing tolerances and thus
brings down the cost of manufacturing spray valve 1010.
[0312] Deformable element 1056 may be formed with one or more holes
in its central portion or any other portion thereof. The upper end
of plunger 1022 preferably abuts against a surface 1059 of
deformable element 1056. Alternatively, in the case of plunger 1022
being constructed as a non-hollow needle, plunger 1022 is
preferably attached to deformable element 1056, such as by means of
spot welding, for example.
[0313] In a most preferred embodiment, deformable element 1056 is
constructed of a bimetallic material, i.e., two dissimilar metals
welded or otherwise joined together, the two metals having
different temperature coefficients of expansion. Due to the
different thermal properties of the two metals, deformable element
1056 has a first orientation when in a reference temperature range
and reversibly deforms to a second orientation when out of the
reference temperature range.
[0314] For example, in the illustrated embodiment, deformable
element 1056 is in the first orientation shown in FIG. 40A. In this
first orientation, surface 1059 of deformable element 1056 has a
generally convex shape when viewed from the upper tip of plunger
1022. Deformable element 1056 applies a force against plunger 1022
generally in the direction of an arrow 1057 so as to prevent
plunger 1022 from sliding from the first position of FIG. 40A to
the second position of FIG. 40B. In the first position, fluid 1018
can flow from container 1016 into longitudinal bore 1031 of adapter
1028, but O-ring 1040 substantially prevents fluid 1018 from
flowing into counterbore 1044 of guide member 1038. Thus, in the
first orientation, deformable element 1056 prevents fluid 1018 from
being dispensed through outlet 1020. Deformable element 1056
remains in the first orientation as long as it is in the reference
temperature range. For example, as long as deformable element 1056
is below -20.degree. C., it will remain in the first orientation.
(As is well known in the art, commercially available bimetallic
elements can be supplied for any desired temperature range.)
[0315] If deformable element 1056 is out of the reference
temperature range, then deformable element 1056 deforms to the
second orientation shown in FIG. 40B. In this second orientation,
surface 1059 of deformable element 1056 has a generally concave
shape when viewed from the upper tip of plunger 1022. The
deformation of deformable element 1056 permits plunger 1022 to
slide generally in the direction of an arrow 1055 (opposite to the
direction of arrow 1057 shown in FIG. 40A) to the second position
shown in FIG. 40B. In the second position, fluid 1018 flows into
counterbore 1044 of guide member 1038. In the case of a hollow
plunger 1022, fluid 1018 then flows into hole 1046 through plunger
1022 and out of upper hole 1048 into expansion chamber 1014. In the
case of a non-hollow plunger 1022, fluid 1018 flows from
counterbore 1044 into the space between plunger 1022 and bore 1042
up into expansion chamber 1014. Fluid 1018 then expands in
expansion chamber 1014 and exits outlet 1020 as a spray. Deformable
element 1056 remains in the second orientation as long as it is out
of the reference temperature range. For example, as long as
deformable element 1056 is at a temperature equal to or greater
than -20.degree. C., it will remain in the second orientation, and
fluid 1018 will continue to be dispensed from outlet 1020.
[0316] The temperature of deformable element 1056 is determined by
heat transfer between fluid 1018 and deformable element 1056 and by
heat transfer between deformable element 1056 and the environment
outside of dispenser body 1012, as is now described.
[0317] Operation of spray valve 1010 commences by placing container
1016 with spray valve 1010 attached thereto in an environment whose
temperature is out of the reference temperature range. For example,
container 1016 is placed in a room whose ambient temperature is
greater than -20.degree. C. Heat transfer (by conduction through
the walls of dispenser body 1012, and convection and radiation to
the room environment) between deformable element 1056 and the
environment eventually brings deformable element 1056 out of the
reference temperature range after a period of time. In other words,
in the above example, the heat transfer eventually warms deformable
element 1056 from a temperature below -20.degree. C. to a
temperature greater than or equal to -20.degree. C., whereupon
deformable element 1056 deforms to the second orientation, plunger
1022 slides to the second position, fluid 1018 flows from container
1016 to expansion chamber 1014 and expands to a fluid spray that
exits from fluid outlet 1020, as described hereinabove.
[0318] While plunger 1022 is in the second position, fluid 1018
contacts deformable element 1056 and thereby eventually brings
deformable element 1056 back into the reference temperature range.
In other words, in the above example, heat transfer between fluid
1018 and deformable element 1056 cools deformable element 1056 from
a temperature greater than or equal to -20.degree. C. to a
temperature below -20.degree. C., such that deformable element 1056
deforms from the second orientation back to the first orientation
and plunger 1022 slides back to the first position, thereby
preventing fluid 1018 from exiting dispenser body 1012.
[0319] Eventually heat transfer between deformable element 1056 and
the environment once again brings deformable element 1056 out of
the reference temperature range, and the operating cycle repeats
itself.
[0320] Thus spray valve 1010 cyclically dispenses fluid 1018 from
container 1016. Various factors affect the frequency and time
duration of dispensation, amount of fluid dispensed, the operative
reference temperature range, and time for deformable element 1056
to deform between the two orientations. These factors include,
inter alia:
[0321] a. Size of plunger 1022 and any holes thereof (1046, 1048)
through which fluid 1018 flows.
[0322] b. Size of outlet 1020.
[0323] c. Type of bimetallic material (or shape memory alloy, as
described below) from which deformable element 1056 is constructed,
as well as the size and thickness of deformable element 1056. The
type of material affects the time for deformable element 1056 to
deform between the two orientations, temperature behavior of
deformable element 1056, and force applied against plunger
1022.
[0324] d. Whether fluid 1018 flows on surface 1059 of deformable
element 1056 or on an opposite surface thereof (as is described
hereinbelow). If fluid 1018 flows on surface 1059, then the fluid
pressure of fluid 1018 retards the deformation of deformable
element 1056 from the second to the first orientation. Conversely,
if fluid 1018 flows on a side opposite to surface 1059, then the
fluid pressure of fluid 1018 aids in pushing deformable element
1056 from the second to the first orientation.
[0325] e. The physical and thermal properties of fluid 1018, as
well as its pressure.
[0326] f. More than one deformable element 1056 may be used. For
example, two or more deformable elements 1056 may be stacked
together and used as one composite deformable element. The number
of deformable elements 1056 governs the force that the deformable
elements apply against plunger 1022. An assortment of deformable
elements 1056 may be provided with different thermal
characteristics, mechanical properties or physical dimensions, in
order to cover a wide range of applications.
[0327] g. Size of expansion chamber 1014.
[0328] h. Thermal properties of thermal insulation 1019.
[0329] It is noted that in the above example, deformable element
1056 is warmed by the environment in order to dispense fluid 1018,
and is cooled by fluid 1018 in order to stop dispensing fluid 1018.
It is appreciated that the present invention can also be carried
out for dispensing fluids which are hotter than the environment. In
such a case, deformable element 1056 is cooled by the environment
in order to dispense fluid 1018, and is warmed by fluid 1018 in
order to stop dispensing fluid 1018.
[0330] An alternative material for constructing deformable element
1056 is a shape memory alloy, such as a nickel titanium alloy.
Shape memory alloys have the ability to return to a predetermined
shape upon heating via a phase transformation between austenitic
and martensitic structures.
[0331] Reference is now made to FIGS. 41A and 41B, which illustrate
a spray valve 1060 constructed and operative in accordance with
another preferred embodiment of the present invention, in
respective closed and open configurations. Spray valve 1060 is
substantially constructed the same as spray valve 1010, with like
elements being designated by like numerals. Spray valve 1060
differs from spray valve 1010 in that spray valve 1060 includes a
channel 1062 which directs flow of fluid 1018 against a surface
1064 of deformable element 1056 opposite surface 1059. Fluid 1018
still exits as a fluid spray from side outlet 1020. As mentioned
above, since fluid 1018 flows on surface 1064 opposite to surface
1059, the fluid pressure of fluid 1018 aids in pushing deformable
element 1056 from the second to the first orientation.
[0332] Reference is now made to FIGS. 42A and 42B, which illustrate
a spray valve 1070 constructed and operative in accordance with yet
another preferred embodiment of the present invention, in
respective closed and open configurations. Spray valve 1070 is
substantially constructed the same as spray valve 1060, with like
elements being designated by like numerals. Spray valve 1070
differs from spray valve 1060 in that spray valve 1070 includes a
channel 1072 which directs flow of fluid 1018 from surface 1064 of
deformable element 1056 to an upper outlet 1074, from which fluid
1018 exits as a spray.
[0333] Reference is now made to FIGS. 43A and 43B, which illustrate
a spray valve 1080 constructed and operative in accordance with yet
another preferred embodiment of the present invention, in
respective closed and open configurations. Spray valve 1080 is
substantially constructed the same as spray valve 1010 or 1060,
with like elements being designated by like numerals. Spray valve
1080 differs from spray valve 1010 or 1060 in that in spray valve
1080, deformable element 1056 is arranged with respect to expansion
chamber 1014 such that expansion chamber 1014 extends around
deformable element 1056 by means of a bypass 1082. In this manner,
in the second orientation, fluid 1018 flows against both lower and
upper surfaces 1059 and 1064 of deformable element 1056. The fluid
1018 can exit from either a side outlet (as shown in FIGS. 43A and
43B) or as an upper outlet (as in the embodiment of FIGS. 42A and
42B).
[0334] It is noted that aerosol cans contain a pressurized liquid
which is dispensed as droplets or as a mist or gas. However,
aerosol cans cannot generally dispense a fluid which has already
changed to gas inside the can. In the present invention, the
presence of expansion chamber 1014 permits dispensing fluid 1018
even if fluid 1018 has already changed to a gaseous state.
[0335] It is be appreciated that many other arrangements of the
internal components of spray valves 1010, 1060, 1070 and 1080 are
possible within the scope of the present invention.
[0336] Reference is now made to FIG. 44, which illustrates a valve
1090 constructed and operative in accordance with a preferred
embodiment of the present invention. Valve 1090 can be employed in
any kind of aerosol spray system, including the above described
embodiments of the present invention, and is particularly useful in
systems which spray a predetermined amount of substance or where a
safety valve is required. Valve 1090 can be integrated with or
replace the existing valve of the spray system.
[0337] Valve 1090 preferably includes a lower body 1092 with a
narrow extension 1094. Extension 1094 is adapted to be fluid
connected with a feed tube 1095 through which contents of a
container 1096 can flow. Feed tube 1095 is preferably the feed tube
shown and described hereinbelow with reference to FIGS. 41A-41D,
but alternatively any other kind of feed tube may be used. Body
1092 and extension 1094 are preferably formed with a central bore
1098 which extends into a counterbore 1107. In the position shown
in FIG. 44, a stopper 1106 is disposed at the bottom of counterbore
1107, thereby defining a volume 1108 between stopper 1106 and an
upper end 1102 of counterbore 1107. A clearance preferably exists
between the outer perimeter of stopper 1106 and the inner perimeter
of counterbore 1107, such that a portion of the contents of
container 1096 can flow from container 1096 around stopper 1106 and
fill volume 1108.
[0338] An expansion chamber 1099 is preferably formed in an inner
volume of an upper body 1110, which preferably has a lower
extension 1112 that snaps fixedly on lower body 1092. A soft
elastomeric (e.g., rubber) washer 1105 may be placed between upper
and lower bodies 1110 and 1092. Alternatively, lower and upper
bodies 1092 and 1110 may be constructed as one unitary body, in
which case there is no need for washer 1105. Deformable element
1056 is disposed in expansion chamber 1099. A plunger 1100 is
preferably attached to deformable element 1056, such as by means of
spot welding, for example. Plunger 1100, preferably non-hollow, is
arranged to slide from an upper position shown in solid lines in
FIG. 44 to a lower position shown in dashed lines.
[0339] In the lower position, plunger 1100 preferably sealingly
slides into an O-ring 1104 affixed at the upper end 1102 of
counterbore 1107.
[0340] In accordance with a preferred embodiment of the present
invention, expansion chamber 1099 has a shape that conforms to the
limits of the deformed orientations of deformable element 1056.
Expansion chamber 1099 preferably is formed with a hole 1099A,
through which passes plunger 1100. The conformal shape of expansion
chamber 1099 has several advantages:
[0341] a. The shape of expansion chamber 1099 permits placing a
spray outlet 1101 at any angle or orientation in expansion chamber
1099, thereby enabling spraying contents of a container in any
direction.
[0342] b. Any number of spray outlets 1101 of any combination of
size and shape may be employed, through which the contents are
sprayed essentially simultaneously. By controlling the number, size
and shape of the outlets 1101, one can substantially prevent excess
pressure build-up in expansion chamber 1099.
[0343] c. Because of the shape of expansion chamber 1099, the fluid
contents of the container flow both over and under deformable
element 1056 generally at the same time.
[0344] d. The conformal shape of expansion chamber 1099 has a small
volume, thereby permitting spraying small dosages of the contents
of the spray container.
[0345] e. The shape also prevents accumulation of any leftover
matter that did not completely exit the expansion chamber 1099
during the previous spraying. Any leftover matter flows along the
bottom of expansion chamber 1099, drains through hole 1099A and is
sprayed during the next spraying.
[0346] f. The size of expansion chamber 1099 determines the
quantity of fluid 1103 that can be sprayed, and the amount of
liquid droplets of fluid 1103 that will be sprayed as opposed to
gaseous matter. The larger the chamber, the more room there is for
fluid 1103 to expand, and consequently less liquid droplets will be
sprayed. Conversely, the smaller the chamber, the more liquid
droplets will be sprayed. The maximum quantity of substance which
can be sprayed at a time is about equal to volume 1108. However, it
is preferable not to spray more than volume 1108 at a time, so that
stopper 1106 will not become lodged in end 1102 of bore 1098.
[0347] Operation of valve 1090 is now described. Initially, a
quantity of fluid 1103 has flowed from container 1096 through tube
1095 and bore 1098 into volume 1108. When deformable element 1056
is in the upward (solid line) position of FIG. 44, the internal
pressure of the contents of container 1096 push upwards (in the
sense of FIG. 44) against stopper 1106 and force some of the fluid
1103 upwards from volume 1108 through hole 1099A into expansion
chamber 1099. Fluid 1103 expands in expansion chamber 1099 and
exits as a spray through spray outlet or outlets 1101. Fluid 1103
flows around the ends of deformable element 1056, such that fluid
1103 cools both sides of deformable element 1056. Once deformable
element 1056 has sufficiently cooled, it snaps to the lower (dashed
line) position shown in FIG. 44. Plunger 1100 slides into O-ring
1104 and seals the upper end 1102 of counterbore 1107. Stopper 1106
drops back down by gravity to the bottom of counterbore 1107 and a
fresh portion of the contents of container 1096 flows upwards past
stopper 1106 and re-fills volume 1108. The re-filled volume 1108 is
now ready for the next spray.
[0348] Optionally, valve 1090 may be configured to be a one-way
valve, i.e., a valve that prevents matter from flowing back into
container 1096. This may be accomplished by placing a small,
preferably elastic, ball 1156 below stopper 1106. Ball 1156 can
become lodged in a chamfered portion 1158 formed in bore 1098 at
the throat of lower extension 1094. Ball 1156 does not interfere
with flow of fluid 1103 from container 1096 towards deformable
element 1056 and chamber 1099, but does substantially prevent flow
of fluid backwards towards container 1096.
[0349] Once again, it is to be emphasized that deformable element
1056 is free to snap from one position to another without any
clamping forces. This is because deformable element 1056 is not
clamped, but rather freely supported. There is preferably an
up-and-down gap 1183 (in the sense of FIG. 44) and a radial gap
1185 between deformable element 1056 and the inner surfaces of
expansion chamber 1099. Radial gap 1185 ensures that there are no
radially-directed stresses acting upon deformable element 1056, and
enables plunger 1100 to self-center relative to O-ring 1104 without
any radially-directed forces acting upon deformable element 1056.
The presence of gaps 1183 and 1185 relaxes manufacturing tolerances
and brings down manufacturing costs.
[0350] Generally only about half or less of the fluid 1103 in
volume 1108 is sprayed at a time. Various factors affect the
frequency and time duration of dispensation, amount of fluid
dispensed, the operative reference temperature range, and time for
deformable element 1056 to deform between the two orientations, as
described hereinabove.
[0351] If any malfunction occurs and plunger 1100 does not close
properly, the internal pressure of the contents of container 1096
will continue to force stopper 1106 upwards towards upper end 1102
of bore 1098 such that stopper 1106 will become lodged in end 1102
of bore 1098, thereby substantially sealing upper end 1102 of bore
1098 and preventing further spraying of the contents. It is noted
that in FIG. 44 stopper 1106 is illustrated as having an upper
protrusion 11 06A which abuts against upper end 1102. However, it
is appreciated that stopper 1106 could be flat and still seal
against end 1102, because the internal pressure of the contents of
container 1096 will maintain an upward force against stopper
1106.
[0352] Thus, stopper 1106 acts as a safety valve which prevents
undesirable over spraying of the contents. Stopper 1106 can prevent
leaking or overspraying due to a variety of malfunctions. For
example, malfunctions can possibly occur due to: knocks or blows to
the container 1096, dropping the container, a gas leak, or the
fluid inside the container being spent. In all cases stopper 1106
will act as a safety valve because the internal pressure will
maintain stopper 1106 sealed against end 1102. In addition, if
spraying is performed with the container in a horizontal or
inverted position, stopper 1106 will also substantially prevent
spraying, because the internal pressure will again maintain stopper
1106 sealed against end 1102.
[0353] In accordance with a preferred embodiment of the present
invention, an on-off switch 1177 can be provided next to deformable
element 1056. On-off switch 1177 may be simply constructed, for
example, as a stem 1178 that slides in a bore 1179 formed in an
upper portion of upper body 1110. A pin 1180 preferably protrudes
from a side of stem 1178. Stem 1178 can be pushed against
deformable element 1056 in the direction of an arrow 1181 in FIG.
44, whereupon stem 1178 can be turned approximately a quarter-turn
so that pin 1180 is received in a groove 1182 formed in the upper
portion of upper body 1110. Once on-off switch 1177 is pushed
against deformable element 1056, deformable element 1056 cannot
snap to the upper position of FIG. 44, and valve 1090 is thus
switched off. Conversely, the valve is turned on by removing pin
1180 from groove 1182.
[0354] On-off switch 1177 can act as a manual reset for the stopper
1106 as well. The action of pushing on-off switch 1177 downwards
(in the sense of FIG. 44), without quarter-turning stem 1178,
dislodges stopper 1106 from the upper end 1102 of counterbore 1107.
It is appreciated that other on-off switches may also be
employed.
[0355] It is noted that the embodiment of FIG. 44 is distinguished,
inter alia, by its simple construction-deformable element 1056,
lower and upper bodies 1092 and 1110, plunger 1100, expansion
chamber 1099, stopper 1106 and O-ring 1104 (and optionally washer
1105, ball 1156 and on-off switch 1177). The contents of the
container flow directly to deformable element 1056 without any need
for extraneous structure.
[0356] The fluid contents can be directed to flow from underneath
deformable element 1056 as shown and described hereinabove with
reference to FIGS. 40A and 40B, or above deformable element 1056 as
shown and described hereinabove with reference to FIGS. 41A and
41B. In other words, one can construct valve 1090 such that the
flow of the contents helps deformable element 1056 snap back to the
closed position (i.e., flow from underneath deformable element
1056). Alternatively, one can construct valve 1090 such that the
flow of the contents retards deformable element 1056 from snapping
back to the closed position (i.e., flow from above deformable
element 1056). As another alternative, deformable element 1056 can
be formed with one or more holes through which the contents can be
sprayed. The contents can also flow around deformable element
1056.
[0357] In the case of the fluid contents being directed to flow
from underneath deformable element 1056, the upward flow of the
contents applies an upward force upon plunger 1100. This force aids
in snapping deformable element 1056 to the spray orientation, and
shortens the time between sprayings. The smaller the
cross-sectional area of plunger 1100, the smaller the force of the
contents, and the longer time between sprayings. This upward force
can cause deformable element 1056 to snap to the spray orientation
before deformable element 1056 has actually reached the temperature
normally required for snapping (i.e., actuation temperature). This
allows using a deformable element with a slightly higher actuation
temperature, which generally means cost savings, because the price
of bimetallic discs generally decreases with higher actuation
temperatures.
[0358] Reference is now made to FIGS. 45A and 45B, which illustrate
a spray valve 1180 constructed and operative in accordance with
still another preferred embodiment of the present invention. Spray
valve 1180 is constructed generally similarly to valve 1090, with
like elements being designated by like numerals. Spray valve 1180
employs a generally rectangular deformable element 1182 either
freely supported and placed between two halves 1184 and 1186 of an
expansion chamber 1188, or alternatively, clamped around its
perimeter by the two halves 1184 and 1186, or further
alternatively, clamped at only two ends thereof. It is generally
the central area of deformable element 1182 which snaps from one
position to another.
[0359] A hole is preferably formed in the bottom of half 1186 for
plunger 1100 to pass therethrough and for draining any leftover
matter from previous sprayings. Deformable element 1182 is
preferably formed with one or more generally rectangular apertures
1190, through which matter can be sprayed. The matter can exit
expansion chamber 1188 through an upper spray outlet 1192, for
example. Valve 1180 operates in the same manner as the other valves
of the present invention, described hereinabove. It is appreciated
that any abovementioned variations in construction, such as number
and position of spray outlets, for example, can be incorporated in
valve 1180 as well. Unlike circular bimetallic elements, the
rectangular deformable element (bimetallic or shape memory) is not
sensitive to slight misalignments or variations in size, and does
not accidentally reverse its movement under the influence of
all-around clamping.
[0360] Reference is now made to FIGS. 45C-45F which illustrate a
spray valve 1194 constructed and operative in accordance with yet
another preferred embodiment of the present invention. Spray valve
1194 is constructed generally similarly to valve 1180, with like
elements being designated by like numerals. Spray valve 1194
employs a generally rectangular deformable element 1196 with short
ends 1198 which may be bent. Deformable element 1196 is preferably
freely supported in an expansion chamber 1137. There is preferably
a gap 1135 between short ends 1198 and an inner surface of
expansion chamber 1137.
[0361] In FIG. 45C, deformable element 1196 is bent upwards, in the
sense of the figure. As deformable element 1196 starts to snap
downwards, the short ends 1198 move outwards in the direction of
arrows 1127 and abut against inner surfaces of expansion chamber
1137, as seen in FIG. 45E. Once deformable element 1196 snaps
downwards to the position shown in FIG. 45F, there is again a gap
1135 between short ends 1198 and an inner surface of expansion
chamber 1137.
[0362] Many aerosol cans contain liquid and gaseous contents which
must be shaken before spraying in order to mix these contents
properly. Unfortunately, sometimes users forget to shake the
contents, and in some spraying systems, it is inconvenient or
impossible (such as in automatic spray dispensers) to shake the
contents before each spray. The present invention enables spraying
such contents without any need for shaking as is now described.
[0363] Reference is now made to FIGS. 46A, 46B and 46C which
illustrate a tube 1122 useful for spray apparatus, constructed and
operative in accordance with a preferred embodiment of the present
invention. Tube 1122 preferably has a lower open end 1124 in fluid
communication with contents of a spray container 1128. Lower open
end 1124 may be at the tip of tube 1122, or alternatively may be on
a side wall of tube 1122. Lower open end 1124 may be weighted, if
desired, so that open end 1124 gravitates towards the lowest part
of container 1128, irrespective of-the angle at which container
1128 is positioned.
[0364] Spray container 1128 may be any kind of spray container of
the present invention or of the art, and the upper end of tube 1122
may be connected to any kind of spray nozzle (not shown) of the
present invention or of the art, including the safety valve of FIG.
44. The contents of container 1128 preferably include a first
substance 1126, which generally remains in a fluid (liquid or
gaseous) state in container 1128, and a second substance 1117 which
preferably comprises a liquid portion 1132 and a gaseous portion
1133. Gaseous portion 1133 maintains a generally constant pressure
on liquid portion 1132 and first substance 1126. It is this
pressure which pushes the contents of container 1128 out through
tube 1122 for spraying, as will be described hereinbelow. In many
spraying applications, it is preferable that the first substance
1126 and liquid portion 1132 be mixed prior to being sprayed. Tube
1122 mixes the two substances 1126 and 1117 as is described
hereinbelow.
[0365] It is noted that the present invention is also applicable
for spraying fine, solid particles as well. Thus, first substance
1126 can also comprise a solid material, such as a sprayable
powder. Second substance 1117 does not necessarily have to include
both a liquid portion 1132 and a gaseous portion 1133, but rather
can be either liquid alone or gas alone.
[0366] Tube 1122 is preferably formed with one or more side
apertures of any size or shape. In the illustrated embodiment,
there are three apertures, designated 1130A, 1130B and 1130C,
although it is appreciated that any number of apertures may be
formed in tube 1122. (Tube 1122 may alternatively or additionally
be provided with one or more gas intake apertures 1139 to perform
functions described further hereinbelow with reference to FIG.
46D.) FIG. 46A shows spray container 1128 filled with liquid
portion 1132 above first substance 1126, and gaseous portion 1133
above liquid portion 1132. It is seen that liquid portion 1132 is
in fluid communication with the upper aperture 1130A. When the
spray nozzle is opened for spraying, the internal pressure of
container 1128, i.e., the downward pressure supplied by gaseous
portion 1133, forces the first substance 1126 into the open end
1124. As first substance 1126 rises in tube 1122, liquid portion
1132 can enter the upper aperture 1130A and mix with first
substance 1126 as it flows upwards in tube 1122. In this manner,
the two substances are mixed prior to being sprayed, without any
need for shaking the contents of container 1128.
[0367] In FIGS. 46B and 46C, a sufficient amount of the contents
have been sprayed such that spray container 1128 is now partially
full or nearly empty, respectively. Liquid portion 1132 is now in
fluid communication with the middle aperture 1130B or lower
aperture 1130C, respectively. Once again, when the spray nozzle is
opened for spraying, the downward pressure supplied by gaseous
portion 1133 forces first substance 1126 into the open end 1124. As
first substance 1126 rises in tube 1122, liquid portion 1132 can
enter the middle or lower aperture 1130B or 1130C, respectively,
and mix with first substance 1126 as it flows upwards in tube 1122.
The two substances are mixed prior to being sprayed, without any
need for shaking the contents of container 1128.
[0368] It is noted that in FIG. 46B, gaseous portion 1133 enters
the upper aperture 1130A and mixes with first substance 1126 and
liquid portion 1132. In FIG. 46C, gaseous portion 1133 enters the
upper and middle apertures 1130A and 11301B and mixes with first
substance 1126 and liquid portion 1132. In each case, the added
ingredient of gaseous portion 1133 slightly changes the proportion
of first substance to the second substance. Although the change in
proportion is generally negligible, nevertheless it can be
minimized by varying the relative sizes of the lower, middle and
upper apertures 1130A, 1130B and 1130C. In general, the amount of
gaseous portion 1133 which enters tube 1122 and mixes with first
substance 1126 and liquid portion 1132, is mostly a function of the
inner diameter of tube 1122 and the sizes of apertures 1130, rather
than the number of apertures 1130.
[0369] In summary, it is possible to have small, although for most
applications negligible, differences in the ratio of first
substance to second substance as the contents are emptied from
container 1128. The factors which affect the mixing ratio of first
substance 1126 and liquid portion 1132 include, inter alia, initial
ratio of first to second substance, properties of first and second
substances 1126 and 1117, the amount of gaseous portion 1133 left
as the contents of container 1128 are emptied, diameter, shape or
size of the side apertures 1130 and their relative position to each
other, internal pressure of the container, and the spray time,
i.e., the amount of time the contents are sprayed.
[0370] Optionally, as shown in FIG. 46D, tube 1122 may have one or
more apertures 1139 formed at an upper end thereof which are in
fluid communication with gaseous portion 1133 at all times, and are
not in fluid communication with first substance 1126 nor liquid
portion 1132. In this manner, each time the contents of container
1128 are sprayed, first substance 1126 flows up through tube 1122
and mixes only with gaseous portion 1133, thereby maintaining a
constant ratio of the mixture of first substance 1126 and second
substance 1117 (in the form of gaseous portion 1133), no matter
whether the container 1128 is full or not.
[0371] It will be appreciated by persons skilled in the art that
the present invention is not limited by what has been particularly
shown and described hereinabove.
* * * * *