U.S. patent number 3,642,179 [Application Number 05/061,977] was granted by the patent office on 1972-02-15 for self-restoring dispenser.
This patent grant is currently assigned to Leeds & Micallef. Invention is credited to Lewis A. Micallef.
United States Patent |
3,642,179 |
Micallef |
February 15, 1972 |
SELF-RESTORING DISPENSER
Abstract
A self-restoring dispenser for the valve stem of a pressurized
container has an actuator that cooperates with a closure member for
the dispensing orifice of the actuator. The closure member is
responsive to the movement of the actuator and is displaceable
thereby between open and closed positions and, for the sake of
safety, also an intermediate temporary position impact
abutment.
Inventors: |
Micallef; Lewis A. (New York,
NY) |
Assignee: |
Leeds & Micallef (New York,
NY)
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Family
ID: |
22039431 |
Appl.
No.: |
05/061,977 |
Filed: |
August 7, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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702058 |
Jan 31, 1968 |
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Current U.S.
Class: |
222/402.12;
222/402.11; 222/402.13 |
Current CPC
Class: |
B65D
83/226 (20130101); B65D 83/205 (20130101); B65D
83/228 (20130101) |
Current International
Class: |
B65D
83/16 (20060101); B65D 83/14 (20060101); B65d
083/14 () |
Field of
Search: |
;222/402.1,402.11,402.12,402.13,402.14 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Coleman; Samuel F.
Assistant Examiner: Slattery; James M.
Parent Case Text
This is a continuation-in-part of my application Ser. No. 702,058
filed Jan. 31, 1968 now abandoned.
Claims
Having thus described the invention, what I claim as new and desire
to be secured by Letters Patent, is as follows:
1. A self-restoring dispenser, for use in connection with a
pressurized container of fluid material having a discharge valve at
the top of the container with a valve stem extending above the top
plane of the container, said dispenser comprising;
a base adapted to fit onto the top of said container;
an actuator lever supported on said base for angular fulcrummed
movement and movable from a normal rest position to an operating
position at an angle thereto, upon application of an external
pressure force at one end of said lever to perform a dispensing
operation;
a nozzle operable to deliver fluid material released in said
container through said valve and stem;
means controlled by said actuator adapted to couple said nozzle to
said valve stem; and
elongated substantially flat spring means having one fixed end
secured to said base and one free end bearing from below against
said actuator lever and serving to bias said actuator lever toward
said rest position, and operative to restore said actuator lever to
said rest position after cessation of external pressure.
2. A dispenser, as claimed in claim 1, in which:
said actuator lever defines a transfer passage having an inlet port
to engage the valve stem to receive the material delivered from
said container, and said transfer passage has an outlet port to
constitute said nozzle to deliver the material released from said
valve.
3. A dispenser, as claimed in claim 1, in which said spring means
is prestressed sufficiently to hold said actuator in normal rest
position while no external force is impressed on said actuator.
4. A dispenser, as claimed in claim 3, in which:
said spring means is additionally stressed by the actuator when the
actuator is releasably depressed from the rest position, and said
bias means acts to restore the actuator to rest position when the
actuator is released.
5. A dispenser, as in claim 1, in which:
said actuator has an under surface extending on both sides of and
beyond said fulcrum, and said spring means embodies means for
applying balancing pressure to said under surface of said actuator
on at least one side of said fulcrum to pressure-balance said
actuator in the rest position.
6. A self-restoring dispenser, for use in connection with a
pressurized container of fluid material having a discharge valve at
the top of the container with a valve stem extending above the top
plane of the container, said dispenser comprising:
a base adapted to fit onto the top of said container;
an actuator lever supported on said base for angular fulcrummed
movement and movable from a normal rest position to an operating
position at an angle thereto, upon application of an external
pressure force at one end of said lever to perform a dispensing
operation;
a nozzle operable to deliver fluid material released from said
container through said valve and stem;
means controlled by said actuator adapted to couple said nozzle to
said valve stem; and
resilient bias means serving to bias said actuator lever towards
said rest position, and operative to restore said actuator lever to
said rest position after cessation of said external pressure;
said resilient bias means is supported as a cantilever, a lateral
flange mounted on the free end of said resilient bias means
covering the nozzle when the actuator is in the rest position;
and
means operable by the actuator for moving said lateral flange from
covering said nozzle when the actuator is operated to open the
valve to dispense material.
7. A dispenser, as claimed in claim 6, in which:
said actuator lever is disposed to be depressed at one end to
release material from the container, and said nozzle is elevated by
the other end of said actuator lever to dispense said released
material while said flange uncovers the nozzle.
8. A dispenser, as claimed in claim 6, in which:
said actuator moves said bias means to move said flange element to
uncover said nozzle when said actuator means is operated to actuate
the valve stem to release material to said nozzle.
9. A valve actuator, as claimed in claim 1, in which:
said spring means is formed as an integral element of said base
during manufacture of said base.
10. A dispenser, as claimed in claim 1, including a tab integral
with said actuator lever cooperating with a portion of said base to
restrain movement of said actuator lever, said tab being readily
removable to permit said lever to move angularly thereafter.
11. A dispenser, as claimed in claim 1, including limiting means
between said base and said actuator lever permitting movement of
said actuator lever between the normal rest position and operating
position, but restraining movement of the actuator lever in the
opposite direction beyond the rest position.
12. A dispenser, as claimed in claim 1, including means on said
base and said spring means operable to guide said spring means.
13. A self-restoring dispenser, for use in connection with a
pressurized container of fluid material having a discharge valve at
the top of the container with a valve stem extending above the top
plane of the container, said dispenser comprising;
a base adapted to fit onto the top of said container;
an actuator lever supported on said base for angular fulcrummed
movement, and movable from a normal rest position in an angular
direction through a tilting movement to an operating position at an
angle thereto, upon application of an external pressure force at
one end of said lever to perform a dispensing operation;
a nozzle operable to deliver fluid material released in said
container through said valve and stem;
means controlled by said actuator adapted to couple said nozzle to
said valve stem;
resilient bias means serving to bias said actuator lever toward
said rest position, and operative to restore said actuator lever to
said rest position after cessation of said external pressure;
and safety means operable for releasably restraining said actuator
lever to complete more than an initial part of said angular tilting
movement from said rest position, said initial part being
insufficient to release material from said container,
comprising
abutment means including a portion of said actuator lever and a
portion of said base operable for releasable interengagement
thereby arresting said angular tilting movement at an intermediate
position when said actuator lever has completed said initial part
of said angular tilting movement,
said actuator lever being movable in said intermediate position in
one direction different from said angular direction until said
portions have been disengaged and thereby said actuator lever been
released for continuing said angular tilting movement to said
operating position.
14. A dispenser, as claimed in claim 13, and cam means operable for
guiding said actuator lever to said rest position when it is
restored by said resilient bias means.
Description
BACKGROUND OF THE INVENTION
The invention relates generally to pressurized fluid containers
such as "aerosol" cans and more particularly to improved actuating
means for the valve stem thereof.
The term "aerosol can," as used herein, refers to those containers
having a pressurized fluid that is used to dispense the contents of
the container. Generally, the prior art provides a valve stem
extending upwardly from the container. An actuator is used to
engage and axially depress or otherwise displace the stem in order
to open the valve. The actuator includes a passageway fluidly
communicating with the valve stem and terminating in a nozzle or
suitable dispensing orifice. When the actuator is depressed, the
contents of the container flow first through the valve stem, then
through the passageway and are discharged from the nozzle.
While the prior art construction described above is reasonably
efficient and enjoys widespread usage in various forms, it does
exhibit several shortcomings and disadvantages. Perhaps the most
readily apparent drawback of the prior art is the fact that the
dispensing nozzle of the actuator is left open to the atmosphere.
Airborne dust, germs and other contaminants can collect in the
nozzle and then be ejected with the contents the next time the
container is used with potentially harmful consequences. The
residue left in the nozzle may also decompose or solidify and clog
the nozzle. To overcome this, some manufacturers provide an
additional cap but this adds unnecessarily to the production cost
and selling price. Furthermore the cover, which is a separable
part, can be lost or be omitted from use, thus defeating at least
one of its functions.
Another serious limitation in the prior art constructions is that
generally they are not tamperproof against casual or unauthorized
usage by the shopper. Where a cap is used to protect the valve stem
actuator, the cap must be readily removable to permit easy usage of
the aerosol can. However, the easy removability of the cap also
permits a shopper to try out the product and thereby to reduce the
volume of the contents for the ultimate purchaser.
Still another disadvantage of the prior art is that generally no
means are provided for positively indicating the dispensing
direction of the nozzle. Frequently, because the user is not
careful, or is not aware that the nozzle is not properly pointed,
the contents may completely miss the intended target. This is, of
course, both messy and wasteful. Further criticism of the prior art
construction is that frequently the top of the can did not readily
lend itself to price marking while the cans were still in the
shipping carton. Thus additional handling was required at increased
costs. It has also been found that the shape of the top of many
examples of the prior art did not permit safe stacking. Finally, it
has also been found that much of the prior art required greater
effort to actuate the valve stem than does the present
invention.
By way of contrast, the present invention provides a lever or
actuator or actuator lever for an aerosol can valve stem as well as
a closure member that responds to the movement of the actuator
lever. That is, when one portion of the actuator is depressed, the
nozzle is raised into an operative position and the closure member
that initially covered the nozzle in the nonoperative position is
also depressed and thus uncovers the nozzle. The actuator and the
closure member cooperate with each other to provide automatic
exposure of the nozzle when the aerosol can is in use. Further the
actuator and the closure automatically cooperate with each other to
protect the nozzle's dispensing orifice from contaminants when the
aerosol can is not in use. The aforementioned feature and advantage
is inexpensively achieved without the use of any additional,
separate cap to protect the actuator.
It is a feature of this invention that the actuator lever is
"floatingly" supported in the cap or base or base member that is
snapped on to the aerosol can. One portion of the actuator lever is
resiliently supported by the nozzle closure member. Another portion
of the actuator lever includes laterally extending tabs that are
guided in and retained by inverted, open-ended slots formed in the
base member. In one embodiment of the invention, the actuator lever
is displaced angularly about integral pivots that project into
another pair of inverted, open-ended slots in the base member while
in another embodiment the angular movement of the actuator lever is
about laterally extending lugs that mate with similarly shaped,
inverted and open-ended slots in the base member. Each lug has a
surface that acts as a fulcrum and, in effect, provides a camlike
action. Thus the construction of both embodiments allows the
actuator lever to "float" in the slots of the base member.
Means are also provided in the present invention to prohibit the
casual or unauthorized tampering with the actuator lever. A tab is
formed integrally with the actuator lever and cooperates with a
portion of the base that is mounted on the can to prevent the
actuator lever from being depressed. The tab may easily be lifted
up and snapped off by the purchaser prior to the first usage of the
aerosol can. The actuator lever can then be depressed in the usual
manner, there being sufficient clearance, for the tilting of the
actuator lever, between the lever and the base once the tab is
removed.
The present invention also overcomes other deficiencies of the
prior art mentioned above. The actuator lever is formed with
converging sidewalls whereby the lever is narrowest at the end
thereof which contains the nozzle. This construction provides for
an inherent indication of nozzle and spray direction. The
substantially flat top surface of the base is flush with the
planar, upper surface of the actuator lever thus permitting price
marking of the cans while they are still in the shipping container.
Also, the flat, substantially continuous surface of the combined
lever and base allows safe stacking of the aerosol cans.
Accordingly, it is among the principal objects of the invention to
overcome inexpensively the deficiencies of the prior art
constructions.
It is another object of the invention to provide a displaceable
cover for the dispensing nozzle of the valve stem actuator
lever.
It is a further object of the invention to provide a structure
whereby the aforementioned displacement of the nozzle cover is
responsive to the movement of the actuator lever both to and from a
rest position.
It is still another object of the invention to provide an actuator
lever, as described above, that automatically displaces a
resiliently mounted nozzle cover to an open position when the
actuator lever is depressed.
It is still a further object of the invention to provide a floating
support for the actuator lever.
It is still a further object of the invention to provide a
fulcrum-type mounting of the actuator lever.
It is yet another object of the invention to provide means
prohibiting unauthorized or accidental movement of the actuator
lever.
It is yet a further object of the invention to provide means, in
combination with the actuator lever, for positively indicating the
direction of nozzle spray.
It is another object of the invention to provide an improved
actuator lever for an aerosol can wherein price marking is
facilitated and a plurality of cans can be safely stacked.
It is yet another object of the invention to provide a safety
feature which renders it substantially child tamperproof.
These and other features, objects and advantages of the invention
will, in part, be pointed out with particularity and will, in part,
become obvious from the following, more detailed description of the
invention, taken in conjunction with the accompanying drawing which
forms an integral part thereof.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
FIG. 1 is a perspective view of a self-restoring dispenser
illustrating the structural relationship of several of the
components in accordance with the present invention;
FIG. 2 is a fragmentary elevational view showing the structure of
FIG. 1 as applied to an aerosol can;
FIG. 3 is a large scale underside plan view of the dispenser taken
on the line 3--3 of FIG. 2;
FIG. 4 is a fragmentary side elevational view, partly in section,
taken on the line 4--4 of FIG. 2 and showing the parts in the
normal rest or nonoperative position;
FIG. 5 is an elevational, partly sectional, view similar to FIG. 4,
but showing the dispenser in the operative position;
FIG. 6 is a sectional elevational view of the base and
actuator-biasing member taken on the line 6--6 of FIG. 4;
FIG. 7 is a sectional elevational view taken on the line 7--7 of
FIG. 6;
FIG. 8 is a large-scale underside view of the actuator lever in
accordance with one embodiment of the invention;
FIG. 9 is a fragmentary, extended elevational view, partly in
section, of a modification;
FIG. 10 is a fragmentary large-scale side elevational view, partly
in section, similar to FIG. 4 but embodying a modification shown in
the rest position; and
FIG. 11 is a fragmentary large-scale side elevational view, partly
in section, similar to FIG. 5 but showing the modified dispenser in
an intermediate position between the rest position (FIG. 10) and
the operating position (FIG. 5).
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawing, FIG. 1 illustrates the basic
components of the present invention. The device as a whole is
designated by the reference character 10 and is comprised of a cap
or base or base member 12, a resilient plate 14 (FIG. 3) and an
actuator or lever or actuator lever 16. Although for convenience,
the plate 14 is described as a separate element that is suitably
secured to a portion of the base 12, it should be clearly
understood that the base 12 and the plate 14 can be molded together
as a single unit in accordance with a preferred embodiment of the
present invention.
The base 12 is formed with a shirt or skirt portion 20, the outside
bottom end of which is so dimensioned as to be snugly received on
the inside of a channel C that is formed near the top of a
conventional aerosol can A. The top surface 22 of the base 12 is
substantially flat and includes a diametrically positioned channel
24 that is defined by opposite straight walls or wall portions 26
that are spaced apart from each other and are positioned
convergingly relative to each other. Both ends of the channel 24
terminate at the skirt portion 20 of the base. For purposes to be
described hereinafter, the wall portions 26 include pairs of
opposed, open bottomed recesses, one pair of recesses 30 being
formed near the wider end of the channel 24, the other pair of
recesses 32 being formed near the narrower end of the channel 24.
Further the walls 26 each include a pair of opposed tabs 34 that
project inwardly therefrom near the narrow end of the channel 24.
The function of the tabs 34 will be described later.
As mentioned above, the bottom end of the skirt 20 is so
dimensioned as to be received in a channel formed in the aerosol
can. It is desirable, however, to include additional means to
prevent accidental removal of the base and yet permit simple and
preferably automatic assembly thereof to the aerosol can.
As best shown in FIGS. 3, 6 and 7, a ring member 36 is formed
integrally with the base member 12 and extends downwardly from the
underside thereof. The ring member 36 is almost completely
circular, being open only at the narrow end of the channel 24 to
permit free movement of the narrow end of the plate 14. In this
connection is should be noted that the portions or sections 38 of
the walls 26 that are within the diameter of the ring 36, are
shorter than the remaining sections of the walls 26 which extend
downwardly to the plane of the bottom end of the ring 36. The wall
sections 38 are dimensioned such that in the assembled condition
they rest across the top of the aerosol can mounting cup.
The lower end of the ring member 36 is formed with an inwardly
directed lip 40 that is dimensioned to engage the annular mounting
cup located around the valve stem with a slight interference or
"snap" fit. When the base 12 is forced downwardly and the skirt 20
is seated in the channel of the can, the lip 40 of the ring member
36 positions itself below the mounting cup flange in order to
resist an upward pull on the base member 12.
The second major component of the assembly forming this invention
is the resilient plate 14. In accordance with a preferred
embodiment, the resilient plate 14 is molded integrally with the
base 12 of plastic material, provided that the plastic material has
the required characteristics of flexibility and resiliency. As
shown particularly in FIG. 3, the plate 14 is wedge-shaped and is
comprised of a base leg 46 that may be integrally joined at areas
48 to the sidewalls 26, a pair of spaced, converging side portions
50 that extend from the base leg 46, and a body portion 52 that
extends from the side portions 50. An edge 52a of the body portion
52, the side portions 50 and the base leg 46 define an opening
54.
A notch 56 is formed in each of the side edges of the body portion
52 such that they cooperate with the inwardly projecting tabs 34 of
the walls 26 and function in a manner to be described later. As may
be seen, particularly in FIGS. 4 and 5, the plate 14 is molded
with, or otherwise formed and assembled to, the base 12 with a
suitable clearance between the converging sides of the plate 14 and
the walls 26 which converge at substantially the same angle.
Clearance is also provided between the respective notches 56 and
the tabs 34. As an important aspect of this invention, the plate 14
includes a nozzle cover 58 that extends upwardly from the front end
of the body portion.
The plate 14 is also formed with flex points 60 at the juncture of
the side portions 50 and the base leg 46. Finally, it will be seen
in FIGS. 4 and 5, that the side portions 50 are formed at an obtuse
angle to the base leg 46 and the body portion 52 is formed at an
oppositely directed obtuse angle to the side portions 50. When
assembled, the base leg 46 is molded with or secured to the walls
26 in such a manner that the opening 54 in the plate 14 is disposed
about the aerosol can valve stem. In the normal rest or
nonoperative position, with the nozzle covered (FIG. 4), the body
portion 52 is in a substantially horizontal position with the top
surface thereof in planar abutment with the underside of the
actuator lever 16.
The actuator lever 16 that cooperates with both the base 12 and the
plate 14 is also substantially triangular in shape (FIG. 8). The
sides 62 thereof converge inwardly at substantially the same angle
as the walls 26 of the base 12 and the side portions 50 of the
plate 14 to terminate at the forward or nozzle end 64. The rear or
wider end 66 of the substantially flat top surface is utilized to
apply finger pressure to the actuator. Tabs 58 project outwardly
from the two actuator sides 62 near the end 66 and cooperate with
the recesses 30 in the walls 26 of the base 12. Similarly,
cylindrical members 70 project outwardly from the two actuator
sides 62, intermediate the ends thereof and cooperate with the
recesses 32 in the walls 26.
Referring to FIGS. 4 and 5, it will be noted that the underside of
the actuator 16 includes a downwardly depending boss 72 that has a
bore 74. The bore 74 communicates directly with a passageway 76
that is formed in the body of the actuator 16 and which terminates
in a conventional dispensing orifice or nozzle 78 that preferably
has a customary grooved spray insert, for ejecting the contents of
the can in spray form. The nozzle 78 thus in accordance with a
preferred embodiment is a spray nozzle. The bore 74 is suitably
dimensioned to seat directly on the top of the valve stem V when
the actuator 16 is depressed, so that in the operating position
(FIG. 5), the contents of the container may be discharged through
the valve stem V, the bore 74, the passageway 76 and the nozzle
78.
The tamperproof feature of this invention is shown in solid lines
in FIGS. 1 and 2 and in broken lines in FIG. 4. The actuator 16 is
formed with a downwardly extending face 80 at the widest end
thereof, the face 80 being so located that its outer surface is
within the envelope defined by the inner surface of the skirt 20.
An extension 82 is formed integrally with and outwardly offset from
the face 80 so that it is positioned on the outside of the skirt
20. It will be appreciated that the offset portion 84 between the
extension 82 and the face 80 is positioned over the edge 86 of the
skirt 20 and thus will prevent the downward movement of the end 66
of the actuator 16. Thus the aerosol can cannot accidentally be
used. The first authorized user must lift up and break off the tab
82 including the offset portion 84 before the actuator can be
depressed. This construction will prevent the casual user from
sampling and thus depleting the contents.
At this point it should be noted that when fully assembled and
prior to first usage, the actuator 16 fits into the channel 24
(FIGS. 1 and 2) with only sufficient clearance therebetween to
permit free movement of the actuator 16. The top surfaces 22 and 88
of the base member 12 and the actuator 16, respectively, are
substantially flat and flush with each other, thus providing a good
marking surface while the containers are in the shipping carton and
also providing a safe surface for stacking the containers one upon
the other. The foregoing description also makes evident the fact
that directional indications means, in the form of the wedge-shape
of the actuator lever 16, is provided without additional cost.
The embodiment illustrated and described hereinbefore utilizes
rodlike, cylindrical members 70 that extend laterally from the
actuator lever 16 and cooperate with said similarly shaped,
elongated recesses 32 in the sidewalls 26 of the base member 12.
This construction provides for angular displacement of the actuator
16 about the axis of the cylindrical members 70. The present
invention, however, is not limited to this precise construction and
may, in fact, take the form shown in FIG. 9. With the exception of
the fulcrum arrangement to be described hereinafter, the remainder
of the components are the same as in the first embodiment and will
not be described again.
In FIG. 9 it will be seen that somewhat flat, lateral extension or
lugs 90 are provided that are elongated in the direction of the
length of the actuator 16. The recesses 92 are similarly shaped
with the corners rounded in the same manner as those of the
extensions. The present invention also contemplates using either an
arched top surface on the extensions 90 acting against a straight
edge in the recess 92 or an arched edge in the recess 92 being
contacted by extensions 90 having a flat top surface.
Alternatively, both the top surface of the extensions 90 and the
mating edges of the recess 92 can both be arched. Regardless of
which combination is selected the extensions perform as a fulcrum
for the actuator lever 16. The lever then moves angularly about the
fulcrum with the extensions 90 providing, with the recesses 92, a
cam action.
MODE OF OPERATION
To assemble the components, the inherent resiliency of the plastic
material is utilized to permit the actuator 16 to be introduced
into the channel 24 formed on the top of the base 12. It should be
noted that when assembled the tabs 68 at the wider end of the
actuator 16 are positioned in the recesses 30 at the wider end of
the channel 24 and the lateral extensions or fulcrums 70 or 90,
respectively, about which the actuator 16 moves, are in their
mating recesses 32 or 92, respectively. Also, the inwardly
extending projections 34 at the narrow end of the channel are
positioned in the notches 56 at the side edges of the resilient
plate 14. The tabs 68 at the wide end of the actuator 16 and the
extensions 70, 90 near the narrow end thereof provide with the
respective recesses 30, 32, 92 an antirocking feature for the
actuator 16 and limit the upward movement thereof. The base 12 may
now be applied to the aerosol can by having the lip 40 of the ring
38 grippingly engage the mounting cup for the valve stem.
To use the device, the extension 82 and the offset portion 84 at
the outer, bottom end 80 of the actuator 16 is first snapped off.
The actuator 16 may then be depressed at the wider end 66, with the
narrow end 68 pointed at the target. Referring now to FIGS. 4 and 5
it will be seen that as the right hand or wider end of the actuator
16 moves downward and in a clockwise direction about the pivot or
fulcrum, the boss 72 on the underside of the actuator 16 seats
itself on the aerosol valve stem V. Further movement in this
direction will axially depress or otherwise displace the valve stem
V. The dispensing nozzle 78 of the actuator is thereby placed in
communication with the interior of the container.
As soon as the actuator 16 is moved in a clockwise direction by the
user's finger pressure, the resilient plate 14 will move in a
counterclockwise direction from the nonoperative position shown in
FIG. 4 where the nozzle cover 58 is in front of the dispensing
nozzle 78 and the body portion 52 of the plate 14 is in
surface-to-surface contact with the underside of the actuator. The
area of the actuator marked 94 in FIGS. 4, 5 and 8, engages the
edge 52a of the opening 54 in the plate 14.
As the actuator lever is moving clockwise (from FIG. 4 to FIG. 5),
and the base leg 46 of the plate 14 is united with the walls 26,
the plate 14 will flex along the lines 60 and particularly the
nozzle cover 58 thereof will move in a counterclockwise direction
to uncover the dispensing nozzle 78 of the actuator 16. The
opposite angular movements of the actuator lever 16 and the plate
14 occur substantially simultaneously and, in the embodiments
illustrated, the movement of the valve stem V occurs only slightly
thereafter. However it should be clearly understood that the scope
of this invention also includes the seating of the boss 72 directly
on the valve stem, even in the nonoperative or rest position. It
will be evident that, due to the resiliency of the plate 14, a
release of the finger pressure on the wide end 66 of the actuator
lever 16 will allow the plate 14 to return from the operative
position of FIG. 5 to the nonoperative or rest position of FIG.
4.
From the foregoing it will be seen that a very simple, inexpensive
yet effective device has been provided for actuating the valve stem
V of an aerosol can. Finger pressure in only one direction causes
oppositely angular movement of the dispensing nozzle 78 and the
nozzle actuator 16. Release of the finger pressure automatically
permits return of the components to their original, nonoperative
rest position because of the resiliency of the internal plate
14.
In one embodiment of the invention (FIG. 4), the actuator lever 16
moves angularly about a pivot axis, while in the other embodiment
illustrated (FIG. 9), a fulcrum arrangement provides a camlike
angular motion for the actuator lever 16. In both embodiments the
actuator 16 is floatingly supported by the resilient plate 14
because the fore-and-aft lateral extensions 68, 70, 90 of the
actuator lever 16 are contained in elongated, open-ended slots 30,
32, 92. The closed upper ends of the slots 30, 32, 92 coupled with
the spring pressure exerted by the plate 14 onto the actuator 16,
prevent the actuator lever 16 from being unintentionally
disassembled and also provide means for restraining the actuator
lever 16 from rocking relative to the base 12. The inwardly
directed tabs 34 on the converging walls 26 of the base 12 mate
with suitably located notches 56 on the resilient plate 14 to
provide a similar antirocking feature for the plate 14.
In the modification of FIGS. 10 and 11, there is shown a dispenser
generally indicated at 10--10 that generally operates like that of
the preceding embodiments. It has a base member 10--12, a resilient
plate 10--14, and an actuator lever 10--16. Generally, wherever no
reference numerals have been provided in FIGS. 10 and 11, the
reference numerals of FIGS. 4 and 5 apply.
FIGS. 10 and 11 include a safety feature designed to render the
dispenser substantially tamperproof, to aid in protecting the
unwary, such as a child.
For this purpose, the actuator lever 10--10 is provided with a
rearwardly extending nose 101 that has a lower abutment surface
102. The base 10--10 has an upper abutment surface 103. As best
shown in FIG. 11, the two surfaces 102 and 103 will be engaged in
an impact abutment in an intermediate position (FIG. 11) between
the rest position (FIGS. 4, 10) and the operating position (FIG.
5).
Thus, when a person, for instance a child, first depresses the
actuator lever 10--16, in the angular tilting movement designed to
bring it into the operating position (FIG. 5), the lever 10--16
will be arrested in the intermediate position (FIG. 11) after it
has been tilted for only the initial part of the entire actuating
movement. This initial part, as best shown in FIG. 11, is
insufficient to release material from the container A.
At this intermediate position, even continued downward pressure
will not move the actuator lever 10--16, as the interabutment
between the surfaces 102 and 103 will frustrate such an attempt. It
is assumed that a child, after some tries, will give up at this
point.
The adult who wishes to use the dispenser will thereupon push the
actuator lever 10--16 forwardly in the direction F until the nose
101 will clear the abutment surface 103. Thereafter, the operator
may continue the downward pressure to complete the angular tilting
movement of the operating position (FIG. 5).
In order to allow for the forward movement F the recesses 10--32
have been widened as compared to the recesses 32 of the preceding
embodiments, to clear the forward path of the cylindrical members
10--70.
Similarly, the recesses 10--30 have been widened to clear the
forward path of the tabs 10--68.
The forward edge of the recesses 10--30, furthermore, has a cam
surface 104, the purpose of which is to return the tab 10--68 to
the rest position (FIG. 10) when the actuator lever 10--16 is
restored by the resilient plate 10--14.
With the exception of the interruption at the intermediate position
and the required forward movement at that intermediate position,
the operation of the modification of FIGS. 10 and 11 is
substantially that of the preceding views. During the return
movement, the actuator lever 10--16 will be guided shortly before
its return to the rest position by the cam 104 and the forward edge
of the tab 10--68 acting as a cam follower, under the pressure
plate 10--14.
The present invention also provides a substantially flat top that
facilitates price marking while the containers are in their
shipping carton. The substantially flat top surface also aids in
the safe stacking of the containers. Directional indicating means
are provided by the shape of the actuator 16 and means are also
included for decreasing the likelihood of casual or intended
unauthorized tampering by a shopper.
There has been disclosed heretofore the best embodiments of the
invention presently contemplated. I wish it to be understood,
however, that I do not desire to be limited to the exact details of
construction shown and described, for obvious modifications will
occur to a person skilled in the art.
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