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Publication numberUS3428223 A
Publication typeGrant
Publication dateFeb 18, 1969
Filing dateSep 26, 1966
Priority dateSep 26, 1966
Also published asDE1625218A1
Publication numberUS 3428223 A, US 3428223A, US-A-3428223, US3428223 A, US3428223A
InventorsEdward M Lewiecki, Meyer J Shnitzler
Original AssigneeGillette Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Aerosol dispensers and actuator buttons therefor
US 3428223 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 18, 196.9 E, M, L EwlECKl ET Al. 3,428,223

AEROSOL DISPENSERS AND ACTUATOR BUTTONS THERFOR Filed Sept. 26. 1966 g t///// A ma United States Patent O 4 Claims ABSTRACT OF THE DISCLOSURE The present invention is concerned with aerosol dispensers having anti-clog means therein and more particularly with aerosol dispensers in which the discharge passage is sealed off during non-use by an expandable, resilient diaphragm having an expandable discharge oritice therein.

In recent years the growth in the use of pressurized dispensers such as the so-called aerosols for packaging various products has been phenomenal. Generally such dispensers comprise (l) a pressurized container having the product and a propellant disposed therein and (2) valve means for controlling the dispensing of the product from said container. In most dispensers the product usually flows through the valve into a discharge passage of considerable length before it is expelled through a discharge orifice defined by a rigid wall. Such discharge passages usually are located in the valve actuator and/ or valve stem. When using dispensers having such discharge passages, a portion of the product remains in the passages after use where it is exposed to the atmosphere through the discharge oriice. With some products and especially those comprising a non-volatile solid in a volatile solvent or carrier this is undesirable in that, upon evaporation of the solvent or carrier, solid residues build up on the walls and sometimes clog the discharge orifice and/ or the passages. For many years the art has wrestled with this clogging problem. The solutions which have been proposed heretofore have been relatively complex and dificult and expensive to manufacture.

One object of the present invention is to provide simple and inexpensive means for sealing off the discharge passages subsequent to use and thereby prevent the clogging of such passages.

Another object of the present invention is to provide simple means such as mentioned above which during use provide an effective opening for dispensing the product.

Other objects of the invention will be obvious from the following detailed decription taken together with the accompanying drawing wherein:

FIG. 1 is perspective view of a valve actuator of the present invention mounted on the valve stem of a pressurized container;

FIG. 2 is a sectional view of the valve actuator and valve stem along the lines 2 2 of FIG. 1;

FIG. 3 is a perspective view of a diaphragm within the scope of the present invention; and

FIGS. 4a and 4b are perspective views of other diaphragms within the scope of the present invention.

According to the present invention the clogging of the discharge orifice and/or passage is substantially eliminated by using a puncture in a resilient, expandable diaphragm as the discharge orifice. Generally, the puncture is of such size that the walls thereof will substantially abut when the diaphragm is in the unexpanded state. Usually, such punctures may be made with a pointed instrument such as a needle or a common pin or with a similar instrument which would provide a slit or cross-slit without removal of material. It has been found that such ice diaphragms upon contracting and in some instances by contracting and entrapping a small amount of the product in the puncture form an effective seal for the discharge passages and thereby prevent clogging. In subsequent use, under the pressure of the propellant, any residual solid or caked material in or around the puncture is broken up and expelled by the exing and expanding of the diaphragm andan effective opening is provided for dispensing the product. The invention has been found to` be especially 4effective in preventing clogging in dispensers comprising an antiperspirant composition which includes a solid antipersipirant dissolved in a readily volatile solvent such as ethanol.

In general, the dispensers of the present invention comprise a pressurized container having valve means for controlling the flow of material from the container into a discharge passage, said passage leading to a discharge orifice comprising a small puncture in a resilient expandable diaphragm.

Referring to FIGS. l and 2, there is shown a valve actuator 10 embodying the present invention. The valve actuator 10 is iixedly atached to the cylindrical valve stem 12 of a valve (not shown) which may be constructed by any of the various methods well Iknown in the pressurized dispenser art and lwhich is mounted in a pressurized container 14. The valve stem 12 has an axially positioned discharge conduit 16 therein which leads into the discharge passage 18 of the valve actuator 10u The discharge passage 18 opens into a port 20` which is bound by cylindrical lwall 21. The port 20 extends only a relativelyV short distance into the actuator 10 and has a diameter which is somewhat larger than that of the discharge passage 18, thus facilitating the removal of any residual product from it. Within the port 20 there is positioned an annular ring 22 which holds and supports a circular, resilient, expandable diaphragm 24 (see FIG. 3). The annular ring 22 forms a tight seal with the cylindrical wall 21 of the port 20 and is held in place adjacent the rear port wall 23 by an annular stop 26 positioned in the cylindrical wall 21. The diaphragm 24 is generally formed from rubber or plastic material and is resilient and expandable under the pressures usually employed in pressurized dispensers, e.g. 20 to 90 p.s.i. In the diaphragm 24 there is provided a small puncture 28 which was formed by puncturing the diaphragm 24 with a regular sewing needle having a diameter of less than 0.060 inch. In especially useful embodiments of the present invention, the puncture 28 is of such size that when the diaphragm 24 contracts after use, the abutting walls of the puncture or such Walls in combination with any non-volatile product entrapped therein will form an eiective seal. The proper form of pierced orifice for each product, of course, will Vary somewhat depending on factors such as the nature of the ingredients, pressure within the can, desired spray pattern, etc., `but as can be appreciated, it can be readily determined.

The diaphragm 24 for use in the present invention may be conveniently prepared by clam-ping a sheet of rubber within a rigid annular ring and puncturing the rubber in the desired location. The type of rubber and its thickness used in forming the diaphragm will generally depend upon the size of dispensing outlet desired. As can be appreciated, a larger dispensing opening will be provided by using a more readily expandable rubber and a smaller opening will be provided by using a less readily expandable rubber.

Referring to FIGS. 4a and 4b, there are shown other diaphragms 24 within the scope of the present invention. In the diaphragm 24 shown in FIG. 4a the puncture 28a is in the form of a cross and in the diaphragm 24 shown in FIG. 4b the puncture 28b is in the form of a slit.

The present invention is especially useful in dispensers in which the product is expelled in the form of a spray.

In using the dispensers of this invention, the diaphragm 24 and puncture 28 expand under the pressure of the propellant to provide an effective opening for dispensing the product. Upon closing the valve, the diaphragm 24 and puncture 28 contract to provide an effective seal for the discharge passage. In subsequent use the expansion and deforming of the diaphragm 24 breaks up and expels any residual solid or caked material which may be in the puncture 28, and once again an effective dispensing outlet is provided.

Having thus disclosed our invention, what is claimed is:

1. A pressurized dispenser for dispensing compositions comprising a solid, non-volatile material in a volatile vehicle, said dispenser comprising a pressurized container and valve means for controlling the ow of product from said container into a discharge passage, said discharge passage leading to a discharge orifice in a resilient expandable diaphragm, the walls of said discharge orifice substantially abutting when said diaphragm is in the unex-panided state so that said diaphragm effectively seals off said discharge passage during non-use to inhibit the evaporation of the volatile vehicle from any residual composition in said passage and said diaphragm and said discharge orifice therein, upon actuation of said valve means, being expandable by the internal pressure in said dispenser to provide an effective dispensing opening.

2. A pressurized dispenser as defined in claim 1, wherein said diaphragm in combination with entrapped product in said discharge orifice effectively seal off said discharge passage during non-use.

3. A dispenser as defined in claim 1 wherein said discharge orifice is a pin hole in said diaphragm.

4. A valve actuator for an aerosol dispenser which is used to dispense a composition comprising a solid, nonvolatile material in a volatile vehicle, said actuator having a discharge passage therein for connection to the discharge conduit of the valve of said dispenser, said discharge passage leading to a discharge orifice in a resilient, expandable diaphragm, the walls of said orifice substantially abutting when said diaphragm is in the unexpanded state so that said diaphragm effectively seals 0E said discharge passage during non-use to inhibit the evaporation of the volatile vehicle from any residual composition in said passage and said diaphragm and said discharge orifice therein, upon actuation of said valve being expandable by the internal pressure in the dispenser to provide an effective dispenser opening.

References Cited UNITED STATES PATENTS 3,237,866 3/1966 Lovell 222-490 X 3,286,931 11/1966 Webb 239-534 X 3,319,669 5/ 1967 Abplanalp 222-394 X ROBERT B. REEVES, Primary Examiner.

N. L. STACK, Assistant Examiner.

U.S. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3237866 *Feb 27, 1964Mar 1, 1966Delman CoRetractable nozzle
US3286931 *Feb 20, 1964Nov 22, 1966Putnam Equipment CorpNozzle assembly for windshield washer systems
US3319669 *Aug 15, 1966May 16, 1967Robert Henry AbplanalpAerosol dispenser
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4507113 *Nov 22, 1982Mar 26, 1985Derata CorporationHypodermic jet injector
US4728006 *Oct 1, 1984Mar 1, 1988The Procter & Gamble CompanyFlexible container including self-sealing dispensing valve to provide automatic shut-off and leak resistant inverted storage
US5141029 *Dec 19, 1990Aug 25, 1992Eastman Kodak CompanyVariable orifice device
US5353501 *May 4, 1992Oct 11, 1994Eastman Kodak CompanyMethod of manufacturing variable orifice devices
US5642860 *Apr 1, 1996Jul 1, 1997The Procter & Gamble CompanyPump sprayer for viscous or solids laden liquids
US5890655 *Jan 6, 1997Apr 6, 1999The Procter & Gamble CompanyFan spray nozzles having elastomeric dome-shaped tips
US5894964 *Feb 2, 1998Apr 20, 1999Chesebrough-Pond's Usa Co.,Aerosol
US5894967 *Oct 28, 1996Apr 20, 1999The Procter & Gamble CompanySqueeze dispenser for powder
US6991139 *Jul 8, 2004Jan 31, 2006Valois SasFluid dispenser head
US8016163 *Oct 6, 2004Sep 13, 2011AirlessystemsFluid dispenser head
US8287495Oct 10, 2011Oct 16, 2012Tandem Diabetes Care, Inc.Infusion pump system with disposable cartridge having pressure venting and pressure feedback
US8298184Oct 11, 2011Oct 30, 2012Tandem Diabetes Care, Inc.Infusion pump system with disposable cartridge having pressure venting and pressure feedback
US8408421Oct 29, 2008Apr 2, 2013Tandem Diabetes Care, Inc.Flow regulating stopcocks and related methods
US8448824Feb 26, 2009May 28, 2013Tandem Diabetes Care, Inc.Slideable flow metering devices and related methods
US8650937Sep 18, 2009Feb 18, 2014Tandem Diabetes Care, Inc.Solute concentration measurement device and related methods
US8758323Jul 29, 2010Jun 24, 2014Tandem Diabetes Care, Inc.Infusion pump system with disposable cartridge having pressure venting and pressure feedback
EP0703159A1 *Sep 19, 1995Mar 27, 1996Unilever PlcAerosol actuator
WO1998030334A1Dec 23, 1997Jul 16, 1998Procter & GambleFan spray nozzles having elastomeric dome-shaped tips
Classifications
U.S. Classification222/398, 222/402.12, 222/490, 222/575
International ClassificationB05B1/30, B65D83/14, B65D83/16
Cooperative ClassificationB65D83/7535, B05B1/3013, B65D83/20, B65D83/345
European ClassificationB65D83/34B, B65D83/20, B65D83/7535, B05B1/30B