U.S. patent application number 09/755624 was filed with the patent office on 2002-07-18 for dispenser.
Invention is credited to Kim, Jung-Soo.
Application Number | 20020092870 09/755624 |
Document ID | / |
Family ID | 25039905 |
Filed Date | 2002-07-18 |
United States Patent
Application |
20020092870 |
Kind Code |
A1 |
Kim, Jung-Soo |
July 18, 2002 |
DISPENSER
Abstract
A dispenser for transferring a liquid from a container includes
a dispenser body having a first end, a second end and an inner
surface. The first end has an aperture through which the body is
capable of receiving at least a portion of the liquid. A valve stem
is slidably disposed within the dispenser body in engagement with
the inner surface proximate to the first end for movement between a
first position and a second position. The valve stem and the
dispenser body are configured to limit the motion of the valve stem
between the first and second positions to linear motion. The
dispenser may include at least one thread disposed on a generally
outwardly facing surface of a dispenser body capable of releasably
threadably engaging the nozzle when the nozzle is in the closed
position.
Inventors: |
Kim, Jung-Soo; (Masan City,
KR) |
Correspondence
Address: |
AKIN, GUMP, STRAUSS, HAUER & FELD, L.L.P.
ONE COMMERCE SQUARE
2005 MARKET STREET, SUITE 2200
PHILADELPHIA
PA
19103
US
|
Family ID: |
25039905 |
Appl. No.: |
09/755624 |
Filed: |
January 5, 2001 |
Current U.S.
Class: |
222/321.9 ;
222/153.13 |
Current CPC
Class: |
B05B 11/3074 20130101;
B05B 11/305 20130101; B05B 11/3001 20130101; G01F 11/028 20130101;
B05B 11/3067 20130101; B05B 11/306 20130101 |
Class at
Publication: |
222/321.9 ;
222/153.13 |
International
Class: |
G01F 011/06; B65D
088/54 |
Claims
We claim:
1. A dispenser for transferring a liquid from a container,
comprising: a dispenser body having a first end, a second end and
an inner surface, the first end having an aperture through which
the dispenser body is capable of receiving at least a portion of
the liquid; a nozzle slidably engaged with the second end of the
dispenser body and capable of ejecting at least a portion of the
liquid contained in the dispenser body while the nozzle is being
depressed generally toward the first end of the dispenser body; and
a valve stem slidably disposed within the dispenser body in
engagement with the inner surface proximate to the first end for
movement between a first position and a second position, while the
nozzle is being depressed generally toward the first end of the
dispenser the valve stem moves to the first position and
substantially obstructs the aperture to generally prevent the
liquid from flowing through the aperture, while the nozzle is being
displaced away from the first end of the dispenser body the valve
stem moves to the second position causing the aperture to be at
least partially unobstructed by the valve stem so that the
dispenser body is capable of receiving the liquid, wherein the
valve stem and the dispenser body are configured to limit the
motion of the valve stem between the first and second positions to
linear motion.
2. The dispenser of claim 1 wherein the valve stem has a generally
elongated body.
3. The dispenser of claim 1 wherein the valve stem has at least one
projection extending generally outwardly and slidably abutting the
inner surface of the dispenser body to limit the motion of the
valve stem to linear motion within the dispenser body.
4. The dispenser of claim 3 wherein the valve stem has a generally
elongated body and the at least one projection comprises a first
plurality of beams radially extending from and generally
equidistantly distributed along a perimeter of the generally
elongated body.
5. The dispenser of claim 3 wherein the dispenser body has a narrow
portion proximate to the first end of the dispenser as compared to
an adjacent portion of the dispenser body, the narrow portion
having a reduced cross-sectional area as taken along a plane
generally perpendicular to an axis of motion of the nozzle, the at
least one projection of the valve stem engaging the inner surface
of the dispenser along the narrow portion.
6. The dispenser of claim 5 wherein the narrow portion includes an
inwardly tapered section inside of the dispenser body to limit the
linear motion of the valve stem when the valve stem is driven away
from the first position, wherein the second position is defined by
the position of the valve stem while the inwardly tapered section
engages the at least one projection to prevent the valve stem from
moving further away from the first end of the dispenser.
7. The dispenser of claim 6 wherein at least another projection
slidably abuts a portion of the inner surface of the dispenser body
not having the reduced cross-sectional area.
8. The dispenser of claim 7 herein the valve stem has a generally
elongated body and the at least another projection comprises a
second plurality of beams radially extending from and generally
equidistantly distributed along a perimeter of the generally
elongated body.
9. The dispenser of claim 8 wherein the at least one projection
comprises a first plurality of beams radially extending from the
perimeter of the generally elongated body, the first plurality of
beams and the second plurality of beams being generally aligned,
one behind the other, when the valve stem is viewed along a valve
stem axis.
10. The dispenser of claim 1 further comprising at least one thread
disposed on a generally outwardly facing surface of the dispenser
body proximate to the second end for releasably threadably engaging
the nozzle, wherein the slidable engagement between the nozzle and
the dispenser body occurs between a generally smooth, continuous
nozzle surface and a generally smooth, continuous dispenser body
surface which are in complementary, slidable, facing
engagement.
11. The dispenser of claim 1 further comprising a tamper indicator
removably securing the nozzle to the dispenser body wherein
displacing the nozzle away from the dispenser body breaks the
tamper indicator.
12. The dispenser of claim 1 further comprising: a flange disposed
along the inner surface of the dispenser body and extending
generally inwardly; and an elastic member having one end disposed
on the flange and having another end disposed against a portion of
the nozzle to bias the nozzle generally outwardly away from the
dispenser body.
13. The dispenser of claim 12 further comprising: a tube attached
to the nozzle for conveying the liquid contained in the dispenser
body to the nozzle, the tube having a fluid receiving end; and a
stopper disposed about the outer surface of the tube proximate to
the fluid receiving end and extending generally outwardly to
contact the inner surface of the dispenser body, wherein the
elastic member is disposed in the dispenser body on a side of the
stopper opposite from the first end of the dispenser.
14. The dispenser of claim 13 wherein the dispenser body is formed
by a primary dispenser body and a dispenser body insert which is
disposed proximate an end of the primary dispenser body opposite
from the first end of the dispenser body, the dispenser body insert
bearing the flange proximate to an end facing the first end of the
dispenser body to dispose the flange along the inner surface of the
dispenser body.
15. A dispenser for transferring liquid from a container,
comprising: a dispenser body having a first end, a second end and
an inner surface, the first end having an aperture through which
the dispenser body is capable of receiving at least a portion of
the liquid; a nozzle slidably engaged with the second end of the
dispenser body and capable of ejecting at least a portion of the
liquid contained in the dispenser body while the nozzle is being
depressed generally toward the first end of the dispenser body; and
at least one thread disposed on a generally outwardly facing
surface of the dispenser body proximate to the second end of the
dispenser body and capable of releasably threadably engaging the
nozzle.
16. The dispenser of claim 15 wherein the nozzle has at least
another thread on a generally inwardly facing surface for engaging
the at least one thread of the dispenser body.
17. The dispenser of claim 16 wherein a side of the nozzle which
faces the dispenser body includes a groove which extends generally
along and proximate to a perimeter of the side, the groove
providing the generally inwardly facing surface bearing the at
least another thread.
18. The dispenser of claim 16 wherein the slidable engagement
between the nozzle and the dispenser body occurs between a
generally smooth, continuous nozzle surface and a generally smooth,
continuous dispenser body surface which are in complementary,
slidable, facing engagement.
19. The dispenser of claim 17 further comprising a valve stem
slidably disposed within the dispenser body in engagement with the
inner surface proximate to the first end for movement between a
first position and a second position, while the nozzle is being
depressed generally toward the first end of the dispenser the valve
stem moves to the first position and substantially obstructs the
aperture to generally prevent the liquid from flowing through the
aperture, while the nozzle is being displaced away from the first
end of the dispenser body the valve stem moves to the second
position causing the aperture to be at least partially unobstructed
by the valve stem so that the dispenser body is capable of
receiving the liquid, wherein the valve stem and the dispenser body
are configured to limit the motion of the valve stem between the
first and second positions to linear motion.
20. The dispenser of claim 19 further comprising a tamper indicator
removably securing the nozzle to the dispenser body wherein
displacing the nozzle away from the dispenser body breaks the
tamper indicator.
21. A dispenser for transferring liquid from a container,
comprising: a dispenser body having a first end, a second end and
an inner surface, the first end having an aperture through which
the dispenser body is capable of receiving at least a portion of
the liquid; and a nozzle slidably engaged with the second end of
the dispenser body and capable of ejecting at least a portion of
the liquid contained in the dispenser body while the nozzle is
being depressed generally toward the first end of the dispenser
body, wherein the slidable engagement between the nozzle and the
dispenser body occurs between a generally smooth, continuous nozzle
surface and a generally smooth, continuous dispenser body surface
which are in complementary, slidable, facing engagement.
22. The dispenser of claim 21 further comprising at least one
thread disposed on a generally outwardly facing surface of the
dispenser body proximate to the second end for releasably
threadably engaging the nozzle.
23. The dispenser of claim 22 further comprising a valve stem
slidably disposed within the dispenser body in engagement with the
inner surface proximate to the first end for movement between a
first position and a second position, while the nozzle is being
depressed generally toward the first end of the dispenser the valve
stem moves to the first position and substantially obstructs the
aperture to generally prevent the liquid from flowing through the
aperture, while the nozzle is being displaced away from the first
end of the dispenser body the valve stem moves to the second
position causing the aperture to be at least partially unobstructed
by the valve stem so that the dispenser body is capable of
receiving the liquid, wherein the valve stem and the dispenser body
are configured to limit the motion of the valve stem between the
first and second positions to linear motion.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention is directed to devices for
transferring liquid from a container and, more specifically, to a
dispenser having a structure that increases the efficiency of
liquid transport, that is easy to assemble and that reduces the
admission of contaminants into the dispenser.
[0002] Dispensers are commonly used to remove liquids, such as
shampoos or moisturizers, that are packaged in containers. The
liquid is ejected from the container by repeatedly depressing and
releasing the nozzle of the dispenser to transfer liquid from the
container into the dispenser and out of an attached spout or spray
nozzle.
[0003] Conventional dispensers have many drawbacks which impede the
efficient transport of liquid. One example of a conventional
dispenser 10' is shown in FIG. 10. The conventional dispenser 10'
uses a ball valve 12' to regulate the transfer of liquid between
the container (not shown) and the dispenser 10'. The use of a ball
valve 12' increases the probability of misalignment between the
ball valve 12' and the aperture 22' through which liquid is
transferred from the container to the dispenser 10'. Misalignment
between the ball valve 12' and aperture 22' results in reduced
liquid transfer.
[0004] The conventional dispenser 10' has a threaded interface 82'
between an inner surface of the dispenser body 16' and a portion of
the nozzle 14' which results in a gap along the interface between
the nozzle 14' and the dispenser body 16' when the nozzle 14' is in
the up position. The threaded interface 82' is used to secure the
nozzle 14' in the down position (not shown). The gap caused by the
threaded interface 82' between the nozzle 14' and the dispenser
body 16' increases the admission of contaminants, such as water,
into the dispenser body 16' and thus, into the container which can
degrade, or ruin, the liquid contained therein.
[0005] A spring 56' is positioned within the dispenser body 16' to
bias the nozzle 14' generally outwardly from the dispenser body
16'. The spring 56' is typically positioned between the aperture
22' and a fluid receiving end 74' of a tube 64' that is attached to
the nozzle 14'. This positioning of the spring 56' results in a
decreased volume within the dispenser body 16' for temporarily
storing liquid which has been removed from the container for
ejection via the nozzle 14'.
[0006] What is needed, but so far not provided by the conventional
art, is a dispenser having a valve stem that maintains a consistent
alignment with a dispenser aperture to regulate the flow of liquid
into the dispenser body, that has a nozzle which can be readily
secured to the dispenser body in the down position without using a
threaded connection along the slidable interface between the
dispenser body and the nozzle, that biases the nozzle away from the
dispenser body without reducing the available volume within the
dispenser for temporarily storing liquid, and that has a structure
which can be readily assembled.
BRIEF SUMMARY OF THE INVENTION
[0007] Briefly stated, the present invention is directed to a
dispenser for transferring a liquid from a container including a
dispenser body having a first end, a second end and an inner
surface. The first end has an aperture through which the body is
capable of receiving at least a portion of the liquid. A nozzle is
slidably engaged with the second end of the dispenser body and is
capable of ejecting at least a portion of the liquid contained in
the dispenser body while the nozzle is being depressed generally
toward the first end of the dispenser body. A valve stem is
slidably disposed within the dispenser body in engagement with the
inner surface proximate to the first end for movement between a
first position and a second position. While the nozzle is being
depressed generally toward the first end of the dispenser, the
valve stem moves to the first position and substantially obstructs
the aperture to generally prevent the liquid from flowing through
the aperture. While the nozzle is being displaced away from the
first end of the dispenser body, the valve stem moves to the second
position causing the aperture to be at least partially unobstructed
by the valve stem so that the dispenser body is capable of
receiving the liquid. The valve stem and the dispenser body are
configured to limit the motion of the valve stem between the first
and second positions to linear motion.
[0008] Alternatively, the present invention is directed to a
dispenser for transferring liquid from a container including a
dispenser body having a first end, a second end and an inner
surface. The first end has an aperture through which the dispenser
body is capable of receiving at least a portion of the fluid. A
nozzle is slidably engaged with the second end of the dispenser
body and is capable of ejecting a portion of the liquid contained
in the dispenser body while the nozzle is being depressed generally
toward the first end of the dispenser body. At least one thread is
disposed on a generally outwardly facing surface of the dispenser
body proximate to the second end of the dispenser body and is
capable of releasably threadably engaging the nozzle.
[0009] Alternatively, the present invention is directed to a
dispenser for transferring liquid from a container including a
dispenser body having a first end, a second end and an inner
surface. The first end has an aperture through which the dispenser
body is capable of receiving at least a portion of the liquid. A
nozzle is slidably engaged with the second end of the dispenser
body and is capable of ejecting at least a portion of the liquid
contained in the dispenser body while the nozzle is being depressed
generally toward the first end of the dispenser body. The slidable
engagement between the nozzle and the dispenser body occurs between
a generally smooth, continuous nozzle surface and a generally
smooth, continuous dispenser body surface which are in
complementary, slidable, facing engagement.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0010] The foregoing summary, as well as the following detailed
description of the preferred embodiment of the invention, will be
better understood when read in conjunction with the appended
drawings. For the purpose of illustrating the invention, there is
shown in the drawings an embodiment which is presently preferred.
It is understood, however, that the invention is not limited to the
precise arrangement and instrumentality shown. In the drawings:
[0011] FIG. 1 is a top perspective view of a dispenser according to
the present invention;
[0012] FIG. 2 is an exploded view of the dispenser of FIG. 1;
[0013] FIG. 3 is a cross-sectional view of the dispenser of FIG. 1
as taken along the line 3,4A-3,4A of FIG. 1 illustrating the
dispenser in a closed position;
[0014] FIG. 4A is a cross-sectional view of the dispenser of FIG. 1
as taken along the line 3,4A-3,4A of FIG. 1 illustrating the
dispenser in an open position;
[0015] FIG. 4B is an enlarged partial cross-sectional view of the
dispenser of FIG. 1 as taken along the line 4B,4C-4B,4C of FIG. 1
illustrating a valve stem disposed in a first position
substantially obstructing an aperture in a narrow portion of the
dispenser body;
[0016] FIG. 4C is an enlarged partial cross-sectional view of the
dispenser of FIG. 1 as taken along the line 4B,4C-4B,4C of FIG. 1
illustrating the valve stem of the dispenser disposed in a second
position with the aperture at least partially unobstructed by the
valve stem for the dispenser body to receive liquid;
[0017] FIG. 5 is a greatly enlarged bottom perspective view of the
valve stem contained in the dispenser of FIG. 1;
[0018] FIG. 6 is a side elevational view of the valve stem of FIG.
5;
[0019] FIG. 7 is a top plan view of the valve stem of FIG. 5;
[0020] FIG. 8 is a bottom plan view of the valve stem of FIG. 5
illustrating the alignment of a first plurality of beams and a
second plurality of beams, one behind the other, when viewing the
valve stem along a valve stem axis;
[0021] FIG. 9 is a partial cross-sectional view of the dispenser of
FIG. 1 as taken along the line 9-9 of FIG. 1 illustrating the
nozzle; and
[0022] FIG. 10 is a cross-sectional view of a prior art
dispenser.
DETAILED DESCRIPTION OF THE INVENTION
[0023] Certain terminology is used in the following description for
convenience only and is not limiting. The words "right," "left,"
"lower" and "upper" designate directions in the drawings to which
reference is made. The words "inwardly" and "outwardly" refer to
directions toward and away from, respectively, the geometric center
of the dispenser and designated parts thereof. The terminology
includes the words above specifically mentioned, derivatives
thereof and words of similar import. Additionally, the word "a," as
used in the claims and in the corresponding portions of the
specification, means "at least one."
[0024] Referring to the drawings in detail, wherein like numerals
refer to like elements throughout, FIGS. 1-9 illustrate a preferred
embodiment of the dispenser according to the present invention,
generally designated as 10. FIGS. 4B and 4C illustrate a valve stem
12 that regulates the flow of liquid into the dispenser 10 in first
and second positions, respectively. FIGS. 5-8 illustrate a
preferred embodiment of the valve stem 12 according to the present
invention. FIG. 9 illustrates a nozzle 14 for use with the
dispenser 10 of the present invention. FIG. 10 illustrates a prior
art dispenser 10'.
[0025] The dispenser 10 and its components are preferably formed of
a lightweight, durable, non-reactive material, such as a polymer.
Depending upon the liquid being handled by the dispenser 10, those
of ordinary skill in the art will appreciate that various materials
can be used to form the dispenser 10, such as aluminum, steel,
Inconel.TM., alloys or the like. The selection of the appropriate
materials for use with a particular liquid, or liquid mixture, is
within the ambit of one of ordinary skill in the art when
considered in combination with this disclosure.
[0026] The dispenser 10 is preferably for transferring liquid (not
shown) from a container (not shown). Those of ordinary skill in the
art will appreciate from this disclosure that the container may
have any shape without departing from the scope of the present
invention. Those of ordinary skill in the art will also appreciate
that the present invention is not limited to any particular type of
liquid for transport by the dispenser 10. For instance, the liquid
may be any one of a soap, a shampoo, an engine lubricant, an
insecticide, a bleach, a solvent or the like without departing from
the scope of the present invention.
[0027] Referring to FIGS. 1-3, the dispenser 10 includes a
dispenser body 16 having a first end 18A, a second end 18B and an
inner surface 20. The dispenser body 16 preferably has a generally
cylindrical shape with a substantially hollow interior. During
operation, the first end 18A of the dispenser 10 is preferably
located within the container. Referring to FIGS. 3 and 4A, the
inner surface 20 of the dispenser body 16 is preferably formed by
the inner surface 40 of a primary dispenser body 24 (further
described below) and the inner surface 40A of a dispenser body
insert 26 (further described below).
[0028] Referring to FIG. 2, the dispenser body 16 preferably, but
not necessarily, includes the primary dispenser body 24 and the
dispenser body insert 26 which is attached to a top end (as viewed
in FIG. 2) of the primary dispenser body 24. The dispenser body
insert 26 has a generally cylindrical shape to allow the dispenser
body insert 26 to slidably, matingly engage with the primary
dispenser body 24. The dispenser body insert 26 has the general
shape of a hollow cylindrical tube with annular members being
disposed along the upper half of the dispenser body insert 26. The
annular members form an outwardly facing surface 84 (further
described below) for supporting at least one thread 82 (further
described below). The lower end of the dispenser body insert 26 is
sized to be slidably inserted inside a generally circular mouth
positioned along the top end of the primary dispenser body 24.
[0029] An upper portion of the primary dispenser body 24 has an
insert receiving end 28 for receiving the dispenser body insert 26.
The insert receiving end 28 is in the general form of a hollow
cylindrical tube shape. Proximate to the insert receiving end 28 of
the primary dispenser body 24 is a generally annular flange 30. The
flange 30 extends generally radially from the outer circumference
of the primary insert body 24 and is disposed below the generally
outwardly facing surface.
[0030] Referring to FIGS. 2-4A, the insert receiving end 28 of the
primary dispenser body 24 preferably, but not necessarily, has a
threaded portion 34 for engaging a channel 36 that extends around a
bottom side of the dispenser body insert 26. The annular
protrusions of the dispenser body insert 26 form an outer hull for
the dispenser 10 which extends outwardly and downwardly in a
quasi-conical fashion. The outer hull is secured over the insert
receiving end 28 of the primary dispenser body 24. The top side of
the dispenser body insert 26 forms the second end 18B of the
dispenser body 16.
[0031] The lower portion of the dispenser body insert 26 is
preferably formed by a generally downwardly extending cylindrical
tube 38 which can be inserted into the primary dispenser body 24.
The outer surface of the tube 38 preferably tapers gradually
inwardly as one moves from the second end 18B of the dispenser body
16 toward the first end 18A of the dispenser body 16. The gradually
inwardly tapered diameter of the outer surface of the tube 38 of
the dispenser body insert 26 allows the bottom end of the dispenser
body insert 26 to be easily inserted into the primary dispenser
body 24 while creating an interference friction fit between the
upper end of the outer surface of the tube 38 of the dispenser body
insert 26 and the top portion of the primary dispenser body 24 when
the dispenser body insert 26 is fully inserted into the primary
dispenser body 24.
[0032] Referring to FIGS. 3 and 4A, the dispenser body insert 26
preferably bears a flange 42 along the inner surface 20 of the
dispenser body 16. The flange 42 is preferably disposed proximate
to an end of the tube 38 closest to the bottom of the dispenser 10.
It is preferable that the flange 42 be oriented generally
perpendicularly to the axis of movement "M" of the nozzle 14. While
it is preferable that the flange 42 be generally annularly shaped,
those of ordinary skill in the art will appreciate from this
disclosure that the flange 42 can be segmented to form gaps (not
shown) throughout the flange 42 without departing from the scope of
the present invention.
[0033] The dispenser body 16 has a narrow portion 44 proximate to
the bottom of the dispenser 10 as compared to an adjacent portion
46 of the dispenser body 14. Referring to FIGS. 1 and 2, the narrow
portion 44 has a generally smaller diameter than that of the
adjacent portion 46 located above the narrow portion 44.
Accordingly, the narrow portion 44 has a reduced cross-sectional
area as taken along a plane "P" generally perpendicular to an axis
of motion of the nozzle "M."
[0034] Referring to FIGS. 3-5, the valve stem 12 is disposed within
the dispenser body 16 in engagement with the inner surface 20
proximate to the first end 18A for movement between a first
position (shown in FIG. 4B) and a second position (shown in FIG.
4C). The valve stem 12 preferably has a generally elongated body
98. It is preferable, but not necessary, that the elongated body 98
have the shape of a cylinder. Rounded caps 100 are preferably
attached to each end of the elongated body 98. Each rounded cap 100
preferably forms a generally hemispherical protuberance over each
respective end of the elongated body 98. It is preferable, but not
necessary, that the valve stem 12 have at least one projection 102
extending generally outwardly and slidably abutting the inner
surface 20 of the dispenser body 16 to limit the motion of the
valve stem 12 to linear motion within the dispenser body 16.
[0035] Referring to FIGS. 4B and 4C, the at least one projection
102 of the valve stem 12 engages the inner surface 54 of the
dispenser 10 along the narrow portion 44. The narrow portion 44 of
the dispenser body 16 has an inwardly tapered surface 120 that
tapers generally inwardly along the sides of the narrow portion 44
at the upper end of the narrow portion 44. The inwardly tapered
surface 120 binds with the valve stem 12 to limit the motion of the
valve stem 12 away from the bottom of the dispenser 10. Thus, the
valve stem 12 is secured into a second position by the abutment of
the at least one projection 102 and an upper end of the inwardly
tapered surface 120 when the valve stem 12 has reached the second
position. The inwardly tapered surface 120 preferably extends
uniformly around the narrow portion 44 and extends further inwards
as one moves away from the bottom of the dispenser 10. The gradual
narrowing of the diameter of the inwardly tapered surface 120 of
the narrow portion 44 combined with the generally right angled
upper outer edges of the projections 102 arrests the upwardly
motion of the valve stem 12 when the valve stem 12 reaches the
second position.
[0036] Since the inwardly tapered surface 120 only abuttingly
contacts the at least one projection 102, the inwardly tapered
surface 120 and the at least one projection 102 disengage when
there is no upwardly driving force on the valve stem 12.
[0037] At the upper end of the narrow portion 44 is an indentation
122 which has a diameter greater than that of the upper portion of
the inwardly tapered surface 120. The indentation 122 forms a
shoulder which in combination with the curved portion 108 of the
lower surface of the projections 102 simplifies the insertion of
the valve stem 12 into the. narrow portion 44 during the assembly
of the dispenser 10. While it is preferred that a generally
inwardly tapered surface 120 be used to secure the valve stem 12 in
the second position, those of ordinary skill in the art will
appreciate that other methods can be used to secure valve stem 12
in the second position, as detailed below.
[0038] As an alternative to using an inwardly tapered surface 120,
the primary dispenser body 24 can have a wall (not shown) laterally
disposed between the narrow portion 44 and the adjacent portion 46.
The wall would be used in conjunction with a hole (not shown)
generally centrally placed therein. The combination wall and hole
would effectively create a lip which extends generally radially
inwardly from the upper end of the narrow portion 44 to limit the
linear movement of the valve stem away from the bottom of the
dispenser 10.
[0039] It is preferable that a flange 42 (which in the preferred
embodiment formed by a portion of the dispenser body insert 26) is
disposed along the inner surface 20 of the dispenser body 16 and
extends generally inwardly. Referring to FIGS. 3 and 4A, an elastic
member 56 preferably has one end 58 disposed on the flange 42 and
another end 60 disposed against a portion of the nozzle 14 to bias
the nozzle 14 generally outwardly away from the dispenser body 16.
By positioning the elastic member 56 above a stopper 62 (further
described below), the dispenser 10 can take advantage of a maximum
internal volume "V" for receiving and storing liquid prior to
transporting the liquid into the nozzle 14. The elastic member 56
is preferably a coil spring positioned over a tube 64 (further
described below).
[0040] The nozzle 14 is slidably engaged with the second end 18B of
the dispenser body 16 and is capable of ejecting at least a portion
of the liquid contained in the dispenser body 16 while the nozzle
14 is being depressed generally toward the first end 18A of the
dispenser body 16. Referring to FIGS. 1 and 9, the nozzle 14
preferably has a generally cylindrical shape with a chute 66
extending generally downwardly from the bottom of the nozzle 14. A
hollow 72 is formed within the chute 66 and extends generally
upwardly into the nozzle 14 to connect to a first passage 68A. A
spout 70 preferably extends generally laterally from a side of the
nozzle 14 for guiding liquid that is ejected from the dispenser
10.
[0041] A second passage 68B extends through the spout 70 and is in
fluid communication with the first passage 68A. Thus the hollow 72,
the first passage 68A, and the second passage 68B combine to form a
liquid path through the nozzle 14. While it is preferable that the
nozzle 14 has a spout directing liquid generally downwardly and
outwardly from the top of the nozzle 14, those of ordinary skill in
the art will appreciate from this disclosure that a spray nozzle or
the like could be used without departing from the scope of the
present invention.
[0042] Referring to FIGS. 3 and 9, a tube 64 is preferably attached
to the nozzle 14 for conveying the liquid contained in the
dispenser body 16 to the nozzle 14. The nozzle 14 preferably has a
receptacle which is complementarily shaped to receive the tube 64.
The receptacle extends generally downwardly from the inner surface
of the top of the nozzle. The tube 64 has a fluid receiving end 74
which extends into the dispenser body 16. The top end of the tube
64 is preferably secured against a shoulder 73 of the nozzle which
is disposed about a top end of the hollow 72 proximate to the first
passage 68A (the dispensed liquid traverses the hollow 72 while
being conveyed in the tube 64).
[0043] A stopper 62 is preferably disposed about the outer surface
of the tube 64 proximate to the fluid receiving end 74 and extends
generally outwardly to contact the inner surface 20 of the
dispenser body 16. Referring to FIGS. 3 and 4, it is preferable,
that the elastic member 56 is disposed in the dispenser body 16 on
a side of the stopper 62 opposite from the first end 18A of the
dispenser body 16. This results in the internal volume "V" (defined
by the portion of the dispenser body 16 between the aperture 22 and
the stopper 74) being maximized because it is not necessary to
position an elastic member between the aperture 22 and the stopper
74 to bias the nozzle 14 generally outwardly from the dispenser
body 16.
[0044] Referring to FIGS. 1 and 3, the dispenser 10 preferably
includes at least one thread 82 disposed on a generally outwardly
facing surface 84 of the dispenser body 16 proximate to the second
end 18B of the dispenser body 16 for releasably threadably engaging
the nozzle 14. The threads 82 allow the interface between the chute
66 of the tube 64 and the inner surface of the dispenser body
insert 26 to be free of threaded surfaces while still allowing the
nozzle 14 to be detachably secured to the dispenser body 16 in the
closed position by a user. This reduces the amount of contaminants,
such as water, which are admitted into the dispenser 10 via gaps
between the outer surface of the chute 66 and the inner surface of
the dispenser body insert 26. The slidable engagement between the
nozzle 14 and the dispenser body 16 occurs between a generally
smooth continuous nozzle surface 86 and a generally smooth
continuous dispenser body surface 88 which are in complementary,
slidable, facing engagement. Thus, the positioning of the at least
one thread 82 on an outwardly facing surface 84 of the dispenser
body insert 26 allows for the tightest possible tolerance between
the chute 66 of the nozzle 14 and the inner surface of the
dispenser body insert 26 while still allowing the nozzle 14 to be
detachably secured to the dispenser body 16.
[0045] As best shown in FIG. 9, the nozzle 14 preferably has at
least another thread 90 on a generally inwardly facing surface 92
for engaging the at least one thread 82 of the dispenser body 16. A
bottom side 94 of the nozzle 14 (which faces the dispenser body 16
during operation) includes a generally annular groove 96 which
extends generally along and proximate to a lateral perimeter of the
side 94. The groove 96 forms the generally inwardly facing surface
92 bearing the at least another thread 90.
[0046] Referring to the valve stem 12 shown in FIG. 5, the at least
one projection 102 preferably includes a first plurality of beams
104 radially extending from and generally equidistantly distributed
along a perimeter 106 of the generally elongated body 98. While it
is preferred that the at least one projection 102 include four
beams 104, those of ordinary skill in the art will appreciate from
this disclosure that the projections 102 can have various shapes.
For example, the at least one projection 102 can be a single
annular member (not shown) disposed about the perimeter 106 of the
elongated body 98 and having holes therein to allow the passage of
liquid therethrough without departing from the scope of the present
invention. Similarly, the projections 102 can use beams 104 or
other protuberances (not shown) which are not evenly spaced about
the perimeter 106 of the elongated body 98 without departing from
the scope of the present invention.
[0047] As mentioned above, each of the first plurality of beams 104
preferably has a curved lower portion 108 to facilitate the
downward sliding of the valve stem 12 in the dispenser body 16. The
upper edge of each at least one projection 102 is generally angled
to form a comer to facilitate the engagement of the at least one
projection 102 with the inwardly tapered surface 120 of the
dispenser body 16. Thus, while the valve stem 12 is in the second
position, the at least one projection 102 abuts the inwardly
tapered surface 120 of the narrow portion 44.
[0048] Referring to FIGS. 3 and 4A, at least another projection 110
slidably abuts a portion of the inner surface 20 of the dispenser
body 16 not having the reduced cross-sectional area. The
combination of the at least one projection 102 and the at least
another projection 110 results in the valve stem 12 smoothly moving
within the dispenser body 16 in a generally linear fashion.
[0049] As best shown in FIG. 5, it is preferable, but not
necessary, that the at least another projection 110 include a
second plurality of beams 112 radially extending from and generally
equidistantly distributed along a perimeter 106 of the generally
elongated body 98. While it is preferable that four beams 112 are
equidistantly spaced about the perimeter 106 of the valve stem 12,
those of ordinary skill in the art will appreciate from this
disclosure that any number of beams 112 can be used without
departing from the scope of the present invention. Similarly, the
spacing of the beams 112 or other protuberances (not shown) about
the perimeter 106 of the valve stem 12 can be uneven without
departing from the scope of the present invention. Referring to
FIGS. 5, 7 and 8, it is preferable, but not necessary, that the
first plurality of beams 102 and the second plurality of beams 110
be generally aligned, one behind the other, when the valve stem is
viewed along the valve stem axis 114.
[0050] While the nozzle 14 is being depressed generally toward the
first end 18A of the dispenser 10, the valve stem 12 moves to the
first position (shown in FIG. 4B) and substantially obstructs the
aperture 22 to generally prevent liquid from flowing through the
aperture 22. Those of ordinary skill in the art will appreciate
from this disclosure that small amounts of liquid can pass through
the aperture 22 depending upon the tolerance errors between the
rounded cap 100 of the valve stem 12 and the aperture 22 while the
valve stem 12 still generally prevents liquid from flowing through
the aperture 22.
[0051] When the nozzle 14 is moved away from the first end 18A of
the dispenser body 16, the valve stem 12 moves toward the second
position (shown in FIG. 4C) causing the aperture 22 to be at least
partially unobstructed by the valve stem 12 so that the dispenser
body 16 can receive liquid via the aperture 22. As detailed above,
the valve stem 12 and the dispenser body 16 are configured to limit
the motion of the valve stem 12 between the first and second
positions to linear motion. Those of ordinary skill in the art will
appreciate that due to typical manufacturing tolerances used to
produce the valve stem 12 and the dispenser body 16, it is possible
that slight variances in the linear motion may occur without
substantially causing the valve stem 12 to depart from using
overall linear motion. Accordingly, those of ordinary skill in the
art will appreciate that the term "linear motion" refers to
generally linear motion within typical manufacturing tolerances
accepted within the dispenser manufacturing industry.
[0052] Referring to FIGS. 3 and 9, it is preferable, but not
necessary, that the dispenser 10 include a tamper indicator 116
which removably secures the nozzle 14 to the dispenser body 16. The
first time the nozzle 14 is moved away from the dispenser body 16
the tamper indicator 116 is separated and broken. As is known to
those of ordinary skill in the art, a broken tamper indicator 116
alerts users that a product using the dispenser 10 may have been
tampered with. Referring to FIG. 9, the tamper indicator is
attached to a bottom portion of the nozzle 14 and is preferably
breakably attached to a portion of the dispenser body 16. It is
preferable that the bottom of the tamper indicator be breakably
attached to the dispenser body insert 26 of the dispenser body
16.
[0053] Referring to FIGS. 1 and 2, a bottle adapter 118 is
preferably, but not necessarily, used to secure the dispenser 10 to
the container. In the preferred embodiment, the bottle adapter 118
uses interior threads (not shown) to threadably secure the
dispenser 10 over a mouth of the container.
[0054] Referring to FIGS. 1-9, the dispenser 10 operates as
follows. The dispenser 10 is inserted in (or is already formed
over) the mouth of a container. Referring to FIGS. 1 and 9, a user
rotates the nozzle 14 to disengage the at least another thread 90
of the nozzle 14 from the at least one thread 82 of the dispenser
body 16. As the nozzle 14 is moved generally outwardly from the
dispenser body 16, the tamper indicator 116 is broken. Referring to
FIG. 4A, once the nozzle 14 is threadably disengaged from the
dispenser body 16, the elastic member 56 biases the nozzle 14 into
an outward position. While the nozzle 14 is moving generally
outwardly from the dispenser body 16, the volume "V" in the
dispenser body 16 (between the aperture 22 and the stopper 62)
which receives liquid is increased and the pressure differential
between the inside of the container and the inside of the dispenser
10 causes the valve stem 12 to move toward the second position
(shown in FIG. 4C). The pressure differential between the inside of
the dispenser 10 and the inside of the container is slightly
greater when at least a portion of the fluid remains in the tube
64. Accordingly, it can sometimes take a few repetitions of
depressing and releasing the nozzle 14 to begin the dispensing of
liquid from the nozzle 14 when the dispenser 10 is first being
used.
[0055] While the valve stem 12 is disengaged from the aperture 22,
liquid within the container is suctioned into the dispenser body 16
and at least partially fills the available volume "V". Then, a user
depresses the nozzle 14 toward the first end 18A of the dispenser
10 causing the valve stem 12 to move toward the first position
(shown in FIG. 4B) to generally obstruct the aperture 22 preventing
the liquid contained in the volume "V" of the dispenser body 16
from exiting the dispenser body 16 via the aperture 22. The valve
stem 12 is driven generally toward the first position by the slight
increase in pressure caused by the reduction of the volume "V"
caused by the stopper 62. As the volume "V" is reduced by the
stopper 62 being driven downwardly, liquid enters the tube 64
through the fluid receiving end 74, is transported to the nozzle
14, and is ejected from the spout 70. A user repeats the depressing
and releasing of the nozzle 14 until the desired amount of liquid
has been ejected from the spout 70 and then, threadably secures the
nozzle 14 to the dispenser body 16.
[0056] It is recognized by those of ordinary skill in the art that
changes may be made to the above described embodiment of the
invention without departing from the broad inventive concept
thereof. It is understood therefore, that this invention is not
limited to the particular dispenser embodiment described, but is
intended to cover all modifications which are within the spirit and
scope of the invention as defined by the appended claims.
* * * * *