U.S. patent number 3,703,994 [Application Number 05/159,947] was granted by the patent office on 1972-11-28 for adjustable spray rate actuator.
This patent grant is currently assigned to The Gillette Company. Invention is credited to Louis V. Nigro.
United States Patent |
3,703,994 |
Nigro |
November 28, 1972 |
ADJUSTABLE SPRAY RATE ACTUATOR
Abstract
An adjustable spray rate actuator for a pressurized dispensing
package includes a base member having a passage coupled to the
dispensing valve, a transverse upper surface and a plurality of
grooves extending radially outward from the passage. A cooperating
cap member has a stem which is snap fitted into the passage, a
discharge port in the stem, a transverse surface that mates with
the transverse surface of the base member, and a discharge orifice
aligned with the discharge port. Rotation of the cap member
relative to the base member changes the spray rate as a function of
the dimensions of the groove aligned with the discharge port and
discharge orifice.
Inventors: |
Nigro; Louis V. (Saugus,
MA) |
Assignee: |
The Gillette Company (Boston,
MA)
|
Family
ID: |
22574789 |
Appl.
No.: |
05/159,947 |
Filed: |
July 6, 1971 |
Current U.S.
Class: |
239/397; 239/579;
222/402.17 |
Current CPC
Class: |
B65D
83/20 (20130101); B65D 83/7532 (20130101); B65D
83/44 (20130101); B05B 1/3026 (20130101) |
Current International
Class: |
B05B
1/30 (20060101); B65D 83/14 (20060101); B65D
83/16 (20060101); B05b 001/26 () |
Field of
Search: |
;222/402.11,402.17
;239/573,579,397,442 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wood, Jr.; M. Henson
Assistant Examiner: Love; John J.
Claims
What is claimed is:
1. In a pressurized dispensing package comprising a container and a
tubular valve assembly including a valve opening for dispensing
ingredient from said container, a variable spray rate actuator
comprising
a first actuator member comprising first indicator means, stem
structure having an axial discharge passage disposed for fluid
communication at one axial end thereof with said valve opening, and
a radial discharge aperture for passing fluid radially out through
said stem structure from said axial discharge passage, and outer
wall structure surrounding and radially spaced from said stem
structure, and having an orifice substantially aligned with said
radial aperture, and
a second actuator member, secured to said dispensing package for
rotation relative to said first actuator member, said second
actuator member comprising second indicator means, spray rate
selector structure disposed within said first actuator member
between said stem structure and said outer wall structure, said
selector structure having an inner surface slidably and rotatably
engaging portions of said stem structure adjacent said radial
aperture, an outer surface adjacent said outer wall structure, and
a plurality of discrete fluid flow channels, between said inner
surface and said outer surface, each said channel constructed to
have a different fluid flow rate therethrough, said channels
extending radially outwardly from said stem, being disposed for
communication with said radial aperture, and being
circumferentially spaced from one another such that only a selected
one of said channels is aligned for fluid communication with said
radial aperture at any one time,
said first and second indicator means being cooperatively
constructed and arranged to indicate the one of said channels so
selected.
2. The dispensing package of claim 1 wherein said second actuator
member is friction-fit to said container against rotation relative
thereto, and has a coupling structure formed as an integral coaxial
extension of said selector structure secured to said tubular valve
assembly in a fluid-tight seal.
3. The dispensing package of claim 2 wherein said second actuator
member has an axial passage through said selector structure and
said coupling structure, said tubular valve assembly is located in
one end of said axial passage and said stem structure is located in
the other end of said axial passage secured against axial movement
in said passage, with said axial discharge passage in said stem
structure aligned with the valve opening of said tubular valve
assembly for fluid flow therebetween.
4. The dispensing package of claim 2 wherein said stem structure
has an annular rib along the exterior surface thereof and said
axial passage has a shoulder located to abut said protuberance to
retain said stem structure in said axial passage.
5. The dispensing package of claim 1 wherein
said first actuator member has a first planar surface arranged
transverse to the axis of said stem structure, and closing the
axial end of the stem opposite to the end in fluid communication
with said valve opening, the radial aperture of the stem structure
being at this closed end,
said second valve member has a second generally planar surface,
parallel to and disposed adjacent said interior planar surface,
said parallel surfaces being biased together to form a slidable
fluid-tight seal therebetween, and
said fluid flow channels are defined by grooves to different
cross-sectional area formed in said first surface and sealed along
their length by said second surface.
6. The dispensing package of claim 1 wherein said outer wall
structure of said first actuator member is of annular
cross-sectional area, said flow selector structure has an outer
cylindrical surface sized and located to rotatably and slidably
engage said outer wall structure, and said second actuator member
has, on said outer cylindrical surface, a recess in the region of
each said flow channel to define a mixing chamber between said flow
selector structure and said outer wall structure through which
ingredient passes between said flow channel and said outlet
orifice.
7. The dispensing package of claim 6 wherein said recess is shaped
to define a more restricted flow path in the region of said outlet
orifice than in the region of said flow channel.
8. The dispensing package of claim 7 wherein said flow channel
opens into said mixing chamber at a location axially spaced from
said outlet orifice and each said recess has a rounded protuberance
located opposite said outlet orifice when the flow channel exiting
to said recess is radially aligned with said outlet orifice.
9. The dispensing package of claim 1 wherein said first actuator
member has exposed indicator tab structure defining said first
indicator means, and said second actuator member has exposed dial
structure defining said second indicator means located so that said
tab structure passes along said dial structure as said first
actuator member and said second actuator member are rotated
relatively to one another, said dial structure having a plurality
of spaced indicia identifying said plurality of flow channels
through said selector structure located along said dial such that
for any selected flow channel said tab is adjacent the one of said
indicia corresponding to said selected flow channel.
10. The dispensing package of claim 1 wherein said first actuator
member has exposed tab structure, and said second actuator member
has an exposed interlocking surface lying along the arcuate path
traced by said tab structure when said first and second actuator
members are rotated relative to one another,
and said tab structure and said exposed interlocking surface are
mutually constructed to removably interlock at arcuately spaced
positions corresponding to the coincidence of one of said flow
channels with said radial aperture,
said positions being located on a circle of which said flow
channels define radii, and each said position being on a common
diameter with one of said channels.
11. The dispensing package of claim 10 wherein said exposed
interlocking surface is in the form of a portion of a cylinder
coaxial with said circle and has a plurality of axially elongated
recesses at said positions, and said tab structure has an axially
elongated detent sized to removably interlock with the one of said
recesses located on a common diameter with the flow channel
selected.
12. The dispensing package of claim 10 wherein said second actuator
member has exposed indicator dial structure located adjacent and
along said exposed interlocking surface, said dial structure
including indicia opposite each said interlocking position
identifying the flow channel corresponding thereto, and
said tab structure includes indicating structure passing along said
dial structure with relative rotation of said first and second
actuator members and pointing to indicia thereof corresponding to
the flow channel selected by said rotation.
13. The dispensing package of claim 1 wherein said stem includes an
axially extending slot and said radial discharge aperture is at the
upper end of said slot.
14. The dispensing package of claim 1 wherein said axial discharge
passage of said stem structure is open at one axial end to said
valve opening and closed at its other end, and said radial aperture
is axially spaced from said closed end so that a mixing chamber is
defined adjacent said closed end.
15. The dispensing package of claim 14 wherein the said
cross-sectional area of axial passage opposite said flow channels
is smaller than the cross-sectional area of said axial passage at
its open end.
16. For use with a pressurized dispensing package comprising a
container and a valve assembly including a valve opening for
dispensing ingredient from said container, a variable spray rate
actuator assembly comprising first and second relatively movable
actuator members having interfitting portions, said members having,
respectively, first and second engaging surfaces at the respective
interfitting portion, said surfaces arranged in parallel with one
another, and remaining slidingly engaged with one another along an
interface as said members are moved relative to one another, one
said actuator member having a fluid passage between said valve
opening and a first region of said interface, said engaging surface
of the other member being interrupted at spaced intervals by a
plurality of grooves, each groove having a different
cross-sectional area, said grooves extending from said fluid
passage along said interface to the outer edge of said interface,
said engaging surfaces defining, with said grooves, a plurality of
fluid flow channels from said fluid passage to said outer edge of
said interface, said one actuator member including structure
defining a closure arranged to overlie said outer edge of said
interface to seal the openings of said fluid flow channels at said
outer edge, and an outlet orifice through said closure arranged to
be aligned with a selected one of said flow channels with a
correspondingly selective relative movement of said actuator
members to provide fluid flow out of said flow channel to said
outlet orifice.
17. The assembly of claim 16 wherein said one actuator member
includes stem structure having a discharge passage adapted to be
disposed for fluid communication with said valve opening, and a
discharge aperture from said discharge passage at said interface,
and said other actuator member includes coupling structure defining
a passage extending between said interface and said tubular valve
assembly, said passage being sized to receive said stem structure
and said valve assembly through opposite ends of said passage to
locate and secure said stem structure and said valve assembly for
said fluid communication.
18. The assembly of claim 17 wherein said stem structure includes
an axially extending slot open at one end and said discharge
passage is at the closed end of said slot.
19. The assembly of claim 17 wherein said stem structure has a
protuberance in its exterior surface and said coupling structure
has a shoulder within said passage located to abut said
protuberance to retain said stem structure within said coupling
structure.
20. The assembly of claim 16 wherein said actuator members are
constructed to provide a gap between said outlet orifice and the
fluid flow channel aligned therewith thereby to define a mixing
region for ingredient passing between said orifice and said
channel.
21. The assembly as claimed in claim 16 wherein said other member
includes a plurality of recesses, each said recess being disposed
at the end of a corresponding groove, so that a mixing region is
defined between said outlet orifice and the end of the groove
aligned with said outlet orifice.
22. The assembly as claimed in claim 21 wherein said first and
second actuator members are coaxially mounted for rotation relative
to one another, said engaging surfaces extend generally radially
outward from said axis, said grooves are radially oriented, said
one actuator member has a cylindrical outer surface and said
recesses are formed in said cylindrical outer surface, and said
closure defining structure includes a cylindrical surface that
mates with said cylindrical outer surface.
23. The assembly as claimed in claim 22 wherein said first and
second actuator members further include cooperating releasable
latch structure to secure said outlet orifice in alignment with any
one of said grooves for selecting a desired spray rate, and
indicator means for indicating the selected spray rate.
Description
SUMMARY OF INVENTION
This invention relates to pressurized dispensing packages.
Pressurized dispensing packages having the capability of dispensing
ingredients at more than one user-selected rate are particularly
desirable for dispensing certain products such as hair spray. To
provide such selectivity without departing substantially from
conventional single-spray rate package construction, the package
should have a spray selecting system compatible for use with a
conventional container and valve assembly. Economical spray
selecting systems should also be designed in a minimum of easy to
mold and easy to assemble pieces, which nonetheless provide
reliable spray rate selection and ingredient dispensing.
An object of this invention is to provide a reliable, durable,
easily molded, and readily assembled selectively variable spray
system for dispensing ingredients at selected rates from a
conventional container and valve assembly.
Another object is to provide a selectively variable spray system
which can be fixed at a number of selected spray rates and has easy
to read indicating means for the spray rate selected, all in a
small number of easily molded parts.
The invention features a variable spray rate actuator for a
conventional pressurized dispensing package of the type comprising
a container and a tubular valve assembly including a valve opening
for dispensing ingredients from the container.
In one aspect of the invention, the variable spray rate actuator
comprises a first actuator member and a second actuator member, the
second actuator member being secured to the dispensing package for
rotation relative to the first actuator member. The first actuator
member comprises: first indicator means; stem structure having an
axial discharge passage disposed for fluid communication with the
valve opening and a radial discharge aperture for passing fluid
radially out through the stem structure from its axial discharge
passage; and, outer wall structure surrounding and radially spaced
from the stem structure which has an orifice substantially aligned
with the radial aperture of the stem structure. The second actuator
member comprises: second indicator means; spray rate selector
structure disposed within the first actuator member between the
stem structure and the outer wall structure of the first actuator
member, this spray rate selector structure having a plurality of
discrete fluid flow channels therethrough adapted to be selectively
disposed between said radial aperture and said outlet orifice, each
of the channels being constructed to have a different fluid flow
rate through it. The flow channels extend radially outwardly from
the stem structure of the first actuator member and are
circumferentially spaced from one another such that only a selected
one of the channels is aligned for fluid communication with the
radial aperture at any one time. The first and second indicator
means of the actuator members are cooperatively constructed and
arranged to indicate the one of the channels which is so
selected.
According to one preferred embodiment, the second actuator member
has an outer surface designed for friction fit with the container,
retards rotation of that member relative to the container, so that
the first actuator member may be rotated to achieve spray rate
selecting relative rotation of the actuator members.
A preferred second actuator member also has a coupling structure,
formed as an integral coaxial extension of the selector structure
and which is secured to the tubular valve assembly of the container
in a fluid tight seal, further retarding rotation of the second
actuator member relative to the container. This preferred second
actuator member further has a single axial bore through the
selector structure and the coupling structure with the tubular
valve assembly being located in one end of the axial bore, and the
stem structure of the first actuator member is located in the outer
end and abutting the tubular valve assembly. Thus, material
discharged from the tubular valve assembly immediately enters the
stem structure of the first actuator member. Preferably, this axial
bore has a shoulder located to abut an annular protuberance
provided on the exterior surface of the stem structure received
within he bore, retaining the stem structure within the axial bore
in a manner preventing relative axial movement between the two
actuator members, and hence also securing the first actuator member
to the total package.
In a preferred combination the first actuator member has a first or
planar wall closing an end of its stem structure opposite to that
communicating with the valve opening, and the radial aperture of
the member is at this closed end. The second actuator member of
this preferred combination has a second planar surface parallel to
and disposed adjacent the aforesaid interior planar surface of the
first valve member. The surfaces are biased together to form a
fluid tight seal therebetween. The fluid flow channels are then
defined by grooves of different cross-sectional area formed in the
first surfaces and sealed along their length by the second surface.
The surfaces slide relative to one another as the actuator members
are rotated relative to one another, to change the identity of the
groove aligned with the outlet orifice.
To provide for break-up and mixing of ingredients between the valve
opening and the outlet orifice, the flow selector structure of the
second actuator member preferably has an outer cylindrical surface,
through which each flow channel exits, and which is recessed in the
region where each flow channel so exits so as to define a mixing
chamber at the recessed region. In particular, each of these
recessed regions may also have a rounded protuberance located
opposite the outlet orifice, when the respective flow channel is
aligned with the outlet orifice, which defines a restrictive flow
path in the region of the outlet orifice to provide for swirling
and mixing of ingredients between the flow selector structure and
the outlet orifice of the package. In addition, another mixing or
break-up chamber may be located within the stem structure itself,
by closing the axial end of the stem opposite to that in
communication with the valve opening, and axially spacing the
radial aperture of the stem from its closed end.
To indicate the particular flow channel selected, the first
actuator member preferably has exposed indicator tab structure
defining the first indicator means, and the second actuator member
has exposed dial structure defining the second indicator means. The
dial structure is located so that the tab structure passes along
the dial structure as the actuator members are rotated relative to
one another. The dial structure is provided with a plurality of
spaced indicia corresponding to the plurality of flow channels
through the flow selector structure such that, for any selected
flow channel, the tab is located adjacent and thereby points out
one of the indicia which corresponds to the flow channel
selected.
To assure that the flow channel selected is precisely aligned with
the radial aperture out of the stem and the outlet orifice out of
the first actuator member, the first actuator member is provided
with an exposed tab and the second actuator member with an exposed
interlocking surface lying along the arcuate path traced by the tab
when the actuator members are rotated relative to one another. The
tab and the exposed interlocking surface are mutually constructed
to removably interlock at arcuately spaced positions corresponding
to the coincidence of one of the selected one of the flow channels
with the radial aperture. These positions are located on a circle
of which the flow channels define radii and each position is on a
common diameter with the corresponding flow channel. The second
actuator member may also have an indicator dial located adjacent
each of the aforesaid positions indicating the flow channel
selected at that position. A preferred interlocking arrangement is
in the form of a plurality of axial elongated recesses spaced along
the exposed interlocking surface into which removably snap-fits an
axially elongated detent located on the inside surface of the
tab.
In another aspect, the invention features first and second
relatively rotatably actuator members which have interfitting
portions constructed to have first and second engaging surfaces,
respectively. These surfaces are disposed transverse to the axis of
rotation of the members and slidably engage one another along an
interface. One of the actuator members has a fluid passage from the
valve opening into an inner region of this interface. The second
parallel surface (of the second actuator member) is interrupted at
spaced intervals by radial grooves, each groove being of different
cross-sectional area, and extending from the inner region of the
interface out to its outer edge. The first actuator member has a
closure arranged to overlie the outer edge of the interface to seal
the outer end of each groove, and an outlet orifice through the
closure arranged for alignment with a selected one of the grooves
upon a correspondingly selective relative rotation of the actuator
members. Such grooved flow-controlling surfaces are easily and
precisely molded to provide arcuate and reliable ingredient
dispensing.
Other objects, features and advantages will be apparent to one
skilled in the art from the following description of a preferred
embodiment of the invention, taken together with the attached
drawings thereof, in which:
FIG. 1 is a perspective view of the upper part of a pressurized
dispensing package having secured thereto an actuator collar and an
actuator button embodying the present invention;
FIG. 2 is an exploded view of the package of FIG. 1, with the
collar and button each partially broken away, and the button
rotated forward from the orientation it would have if
assembled;
FIG. 3 is a sectional view of the actuator collar and actuator
button, with the container broken away, where attached to the
collar and button, along the same section as the collar and
button;
FIG. 4 is a top view of the actuator collar;
FIG. 5 is an elevational view, partially broken away, of the
actuator collar;
FIG. 6 is a bottom view, partially broken away, of the actuator
button; and
FIG. 7 is an elevational view, partially broken away, of the
actuator button.
DESCRIPTION OF PARTICULAR EMBODIMENT
The figures show the upper portion of a pressurized dispensing
package 10 including a container 12 for containing ingredient to be
dispensed as well as a suitable propellant in the usual manner. A
valve mounting cup 14 is secured to container 12 by crimping its
outer periphery about bead 16, as shown in FIG. 3, and has an inner
portion 18 through which slidably protrudes tubular valve stem 20.
Valve stem 20 is biased, in the usual manner, to a closed position,
and is opened to discharge ingrdient from the container through the
valve opening 22 by axially depressing the stem in towards the
interior of the container. When pressure is released, the valve
stem automatically returns to the closed position shown in FIGS. 2
and 3.
Actuator collar 30, formed of a resiliently deformable material
such as polyethylene has an outer cylindrical wall 31 (about 0.040
inch thick) containing a plurality (72) of spaced serrations 34
(each in the shape of right-angle grooves) on its outside surface,
each serration being about 0.012 to 0.015 inch deep. The outer
cylindrical wall 32 has an outer diameter of 0.965 inch at its
lower edge 36, is inwardly tapered at an angle of 3.degree. to its
axis toward its upper edge 38, and is 0.455 inch long between lower
edge 36 and upper edge 38, measured parallel to the axis. The upper
ledge 40 is tapered at an angle of about 7.degree. to the plane
perpendicular to the axis of collar 30, and encloses a generally
cylindrical crown 42 (outer diameter 0.403 inch at base--i.e.,
adjacent ledge 40--and 0.385 inch at top), which is spaced from
ledge 40 by groove 43 and which is constructed to accept actuator
button 44 (also formed of polyethylene as hereinafter described).
Three drain slots 45 extends through the base of groove 43. Collar
30 juts inwardly at a distance 0.300 inch up from edge 36 of
surface 32 to define a rear ledge 46, which has the letters "L"
(low), "M" (medium) and "H" (high) printed thereon to define an
indicator dial. Ledge 46 is tapered at an upward 7.degree. angle to
the plane perpendicular to the axis of collar 30 between outer wall
32 and surface 48. Axially elongated recesses 50, 52, 54 each
having in the shape of a right-angle groove, protrude to a maximum
depth of 0.020 inch into surface 48, and are spaced 60.degree.
apart. Stops 56, 58 located at each end of ledge 46 are each
parallel to and spaced about 0.075 inch from a radial line drawn
through the recesses 50, 54, respectively.
The top wall 60 of crown 42 tapers downwardly and inwardly at an
angle of 10.degree. to axial bore 64. An arcuate groove 62 extends
downwardly from wall 60. Axial bore 64 (inner diameter 0.121 inch)
defines at its transition with axial counterbore 66 (inner diameter
0.155 inch), an annular shoulder 68 which is located about 1/8 inch
below the plane defined by the outer edge of top wall 60. Flange
70, which projects inwardly 0.010 inch and has a thickness of 0.032
inch defines a surface 72. The skirt portion of stem 74 below
surface 72 defines a bore 76, the inner diameter of which is 0.155
inch for receiving valve stem 20.
The forward face of crown 42 has three U-shaped recesses 78, 80,
82, each 0.130 inch high by 0.055 inch wide by 0.018 to 0.020 inch
deep. Each recess is shaped to have its lower wall formed as an arc
of a circle of 0.055 inch radius. A rounded protuberance 84 in the
form of a portion of a sphere having a radius 0.060 inch, protrudes
at most 0.008 to 0.010 inch from the base surface of each recess,
and is coaxial with the arc defining the lower wall of each recess.
Elongated grooves 86, 88, 90 have a maximum depth and width of
0.010 inch, 0.014 inch and 0.018 inch, respectively, and a curved
lower wall lying on the circumference of a circle of radius 0.010
inch, 0.013 inch, and 0.018 inch, respectively.
The axially-elongated recesses 50, 52 and 54 are all located on the
circumference of a circle which the three grooves 86, 88 and 90
define radii, and each of the recesses is on a common diameter with
one of the channels. Thus, the recess 50 opposite the L position is
on a common diameter with the narrowest flow channel 86, the recess
52 opposite the M position is on a common diameter with the medium
sized flow channel 88, and the recess 54 opposite the H position is
on a common diameter with the largest flow channel 90.
Actuator button 44 has a depending wall 92, the inner surfaces 94
of which has a diameter of 0.385 inch at its closed end and tapers
outwardly (at a 3.degree. angle) to a diameter of 0.403 inch at its
open end. An outlet orifice 96 extends through the forward side of
wall 92 into recess 98 and has a diameter of 0.020 inch, is 0.025
inch long, and is oriented at an upward 10.degree. angle.
Stem 100 is coaxial with wall surface 94, and extends to upper wall
102. When button 44 is assembled with collar 30, wall 102 is
parallel to and forms a fluid tight seal against the top wall 60 of
crown 42, sealing the grooves 86, 88, 90 along their lengths to
define fluid flow channels of different cross-sectional area.
Stem 100 has an outer diameter of 0.121 inch, an inner diameter of
0.062 inch, and a 0.030 inch wide and 0.295 inch long radial
aperture or slot 104 opposite discharge orifice 98. The rear wall
106 of stem 100 in inwardly tapered, and a counterbore 108 in
button 44 is located in communication with stem 100. Annular rib
110 is 0.036 inch high, about 0.023 inch wide at its widest point,
and has its lower edge located 0.310 inch (measured parallel to the
axis of stem 100) down from the forward upper corner of wall
92.
Indicator tab 112 has two tapered side walls 116 (tapering from
0.150 inch down to 0.090 inch separation), and a 0.025 inch wide
linking portion between the tapered side walls of tab 112 and the
annular wall 92. A locking detent 118 is located on the inside wall
120 of tab 112, wall 120 being a total of 0.310 inch from the
center axis of actuator button 44 (of stem 100). Locking detent 118
is rounded, having a cross-section, perpendicular to the axis of
stem 100, forming one-half of a circle of 0.025 inch radius.
To assemble the actuator assembly, stem 100 of cap 44 is inserted
into bore 64. The axially extending slot 104 allows rib 110 to be
compressed and slide within bore 64 until it is engaged by latch
surface 68. In this position the surface 102 of cap 44 is biased
against surface 60 of base 30 in sealing relation and the upper end
of slot 104 is sealed by the wall of bore 64 except when that slot
is aligned with one of the dispensing grooves 86, 88, 90. The
assembly is then positioned on the package by inserting bore 76 of
collar stem 74 over valve stem 20 and sliding it along that stem
until the upper end of stem 20 abuts shoulder 70. There is a
friction fit between bore 76 of collar stem 74 and the outer
surface of stem 20 and a similar interference fit between the valve
mounting cup 14 and the skirt 32, both interference fits tending to
retard rotation of the actuator base relative to the container
12.
In operation, with indicator tab 112 latched in a dispensing
position (locking detent 118 engaged with a latching recess 50, 52
or 54), the user, by downward pressure on actuator cap 44 moves
that cap, and the valve stem 20 downwardly opening the valve and
allowing the material in the container to be discharged up through
valve opening 22 into the bore of stem 100. The material flows
upwardly against the inclined surface 106 and the mixing chamber
above surface 102 and then radially through the upper end of slot
104 and the aligned dispensing passage to a second mixing chamber
defined between the outer cylindrical wall 94 of the cap and the
corresponding recess 78, 80 or 82. As the rounded protuberance 84
in that recess as closely adjacent outlet orifice 98, a swirling
flow pattern is produced which results in further breakup and
mixing of the material which is then discharged through the
discharge orifice 98 in a dispensing action.
When the user wishes to change the spray rate, he simply rotates
the actuator cap 44 relative to the actuator base in the desired
direction. Since the actuator cap is formed of a relatively
resilient material, the indicator tab 112 deforms to allow the
locking detent 118 to release from its engaged latch recess 50, 52
or 54. This relative rotation is facilitated by the serrations 34
on the skirt of the actuator base which may be gripped by the user,
and by the tight fit of both the skirt 32 with respect to the valve
mounting cup and the fit of depending collar 74 on valve stem 20.
When detent 118 of the adjusting tab 112 snaps into the desired
latch recess 50, 52 or 54, orifice 98 is aligned with a dispensing
groove and similarly the upper end of slot 104 is aligned with that
dispensing groove. The dispensing flow rate is determined by the
cross-sectional area of the selected dispensing groove, thus
enabling ready selection of a series of different flow rates.
Thus it will be seen that the invention provides a simple, compact
and easy to use dispensing package having a range of dispensing
rates which may be readily selected by the user. While a particular
embodiment of the invention has been shown and described, various
modifications thereof will be apparent to those skilled in the art.
Therefore, it is not intended that the invention be limited to the
disclosed embodiment or to details thereof and departures may be
made therefrom within the spirit and scope of the invention as
defined in the claims.
* * * * *