US3797534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power operated means for filling aerosol cans
Assignee: Sprayon Products Inc
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Filing: 1971-02-01
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Granted: 1974-03-19
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Expires: 1991-02-01
Abstract
Abstract An apparatus and method for filling aerosol cans containing a liquid propellent with a material to be dispensed in which a power operated piston is employed to force the material into the aerosol can through a discharge valve of the can. A substantially uniform force is applied to the piston to insure that essentially uniform quantities of material are injected into the can with each stroke of the piston.
Inventors
- 👤 R Skidmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:06
CPC Classifications
B; B65; B65B; B65B31/00; B65B31/003
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
208 words
Apparatus for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising a reservoir having a sufficient capacity for said material to charge a plurality of said aerosol cans, said reservoir having an operating bore provided with a connecting portion adapted to make a sealed communicating connection with the valve of said aerosol can, a piston member mounted for reciprocation in a working direction and a return direction in said operating bore and effective upon reciprocation in the working direction to force said material through said connecting portion and aerosol valve into said can against the pressure of the liquified gas, fluid pressure-actuated means for reciprocating said piston member in strokes of substantially equal length, and means for supplying fluid under a substantially constant pressure to said pressure-actuated means, whereby said fluid pressure-actuated means applies a substantially uniform force to said piston member during the reciprocation thereof in the working direction, and whereby the amount of material injected during each working stroke of the piston is substantially the same and each of said plurality of cans is substantially equally filled by substantially the same number of strokes of said piston member, regardless of the viscosity of said material.
Claim 2
Dependent Claim
208 words
Apparatus for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising a reservoir having a sufficient capacity for said material to charge a plurality of said aerosol cans, said reservoir having an operating bore provided with a connecting portion adapted to make a sealed communicating connection with the valve of said aerosol can, a piston member mounted for reciprocation in a working direction and a return direction in said operating bore and effective upon reciprocation in the working direction to force said material through said connecting portion and aerosol valve into said can against the pressure of the liquified gas, fluid pressure-actuated means for reciprocating said piston member in strokes of substantially equal length, and means for supplying fluid under a substantially constant pressure to said pressure-actuated means, whereby said fluid pressure-actuated means applies a substantially uniform force to said piston member during the reciprocation thereof in the working direction, and whereby the amount of material injected during each working stroke of the piston is substantially the same and each of said plurality of cans is substantially equally filled by substantially the same number of strokes of said piston member, regardless of the viscosity of said material.
Claim 3
Dependent Claim
18 words
The apparatuS of claim 1 wherein said fluid pressure-actuated means is a double-acting, pneumatic cylinder and piston combination.
Claim 4
Dependent Claim
57 words
The apparatus of claim 1 wherein said operating bore has a cross-sectional configuration substantially matching that of the piston member to provide a working fit, and said fluid pressure-actuated means provides a length of stroke for the piston member sufficient to clear the operating bore on its return stroke to permit the reservoir to fill the bore.
Claim 5
Dependent Claim
44 words
The apparatus of claim 3 including means to decelerate the reciprocation of the piston member during a back stroke after clearing said operating bore to allow proper fill of the bore from the reservoir prior to a succeeding forward stroke of the piston member.
Claim 6
Dependent Claim
18 words
The apparatus of claim 3 wherein said operating bore and piston member are free of any seal therebetween.
Claim 7
Dependent Claim
36 words
The apparatus of claim 3 including an aerosol can and wherein, in effecting said sealed communicating connection between said connecting portion and can, one of the sealing parts is resilient plastic and the other is metal.
Claim 8
Dependent Claim
41 words
The apparatus of claim 1 including counter means, and means responsive to the reciprocation of the piston member to actuate the counter means, said counter means being adapted to stop said reciprocation of the piston member upon reaching a predetermined count.
Claim 9
Dependent Claim
53 words
The apparatus of claim 1 wherein said operating bore has a cross-sectional configuration substantially matching that of the piston member to provide a working fit, said connecting portion has check valve means normally preventing release of said material therethrough but adapted to be opened in effecting said sealed communicating connection with the can.
Claim 10
Dependent Claim
18 words
The apparatus of claim 1 wherein the length of the stroke of said piston member is substantially constant.
Claim 11
Dependent Claim
200 words
Apparatus for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising a reservoir having a sufficient capacity for said material to charge a plurality of said aerosol cans, said reservoir having an operating bore provided with a connecting portion adapted to make a sealed communicating connection with the valve of said aerosol can, a piston member mounted for reciprocation in said operating bore and effective upon reciprocation to force said material through said connecting portion and aerosol valve into said can against the pressure of the liquified gas, said piston member and bore having a clearance therebetween to avoid a complete sealing action while providing a working fit, fluid pressure-actuated means for reciprocating said piston member repeatedly through working and return strokes of substantially the same length to fill one of said plurality of cans, and means for maintaining a substantially constant fluid pressure on said pressure-actuated means, whereby a substantially constant force is exerted on said piston member, and whereby each of said plurality of cans is substantially equally filled by substantially the same number of strokes of said piston member, regardless of the viscosity of said material.
Claim 12
Dependent Claim
200 words
Apparatus for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising a reservoir having a sufficient capacity for said material to charge a plurality of said aerosol cans, said reservoir having an operating bore provided with a connecting portion adapted to make a sealed communicating connection with the valve of said aerosol can, a piston member mounted for reciprocation in said operating bore and effective upon reciprocation to force said material through said connecting portion and aerosol valve into said can against the pressure of the liquified gas, said piston member and bore having a clearance therebetween to avoid a complete sealing action while providing a working fit, fluid pressure-actuated means for reciprocating said piston member repeatedly through working and return strokes of substantially the same length to fill one of said plurality of cans, and means for maintaining a substantially constant fluid pressure on said pressure-actuated means, whereby a substantially constant force is exerted on said piston member, and whereby each of said plurality of cans is substantially equally filled by substantially the same number of strokes of said piston member, regardless of the viscosity of said material.
Claim 13
Dependent Claim
159 words
A process for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising: a. disposing a reservoir of said material having a reciprocable piston member in communicating connection with said can, b. reciprocating said piston member by fluid pressure-actuated means through a working stroke and a return stroke to force said material from the reservoir into said connection and through the aerosol valve into said can against the pressure of said liquified gas, c. maintaining a substantially constant fluid pressure on said fluid pressure-actuated means during its reciprocation of the piston member to apply a substantially constant force on said piston during its working stroke and fill substantially equally a plurality of said cans by substantially the same number of strokes of the piston member regarDless of the viscosity of said material, and d. continuing to reciprocate said piston member until the can is filled to a desired extent.
Claim 14
Dependent Claim
159 words
A process for charging material to be sprayed into a pressurized aerosol can having a valve and containing a liquified propellant gas, comprising: a. disposing a reservoir of said material having a reciprocable piston member in communicating connection with said can, b. reciprocating said piston member by fluid pressure-actuated means through a working stroke and a return stroke to force said material from the reservoir into said connection and through the aerosol valve into said can against the pressure of said liquified gas, c. maintaining a substantially constant fluid pressure on said fluid pressure-actuated means during its reciprocation of the piston member to apply a substantially constant force on said piston during its working stroke and fill substantially equally a plurality of said cans by substantially the same number of strokes of the piston member regarDless of the viscosity of said material, and d. continuing to reciprocate said piston member until the can is filled to a desired extent.
Claim 15
Dependent Claim
37 words
The process of claim 11 wherein said reciprocation of the piston member is decelerated during a backward stroke away from said communicating connection to allow proper fill thereof for a succeeding downward stroke of the piston member.
Claim 16
Dependent Claim
18 words
The process of claim 11 wherein said piston member is reciprocated through strokes of substantially the same length.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |