Patent US2615282A successfully refreshed from Google Patents.
Patent US3913804A successfully refreshed from Google Patents.
US3913804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerosol valve actuator
Assignee: Inopak Ltd
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Filing: 1974-07-19
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Granted: 1975-10-21
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Expires: 1994-07-19
Abstract
Abstract An aerosol valve actuator internally forms a cylinder containing a rigid bodily slidable reciprocating piston behind the actuator''s orifice and from which a piston rod extends forwardly with a forward end forming a valve head normally seating on the inside surface of the actuator surrounding its orifice, a spring biasing the piston and piston rod forwardly to normally seal the orifice closed. The actuator has a hole receiving the aerosol valve stem and mounting the actuator on this stem, this hole opening transversely inside of the actuator between the front of the piston and the orifice. When the actuator is finger-pressed to depress the aerosol valve stem and open the valve to release a pressurized product from an aerosol package container having the valve, the product enters the actuator, forcing the piston and piston rod backwardly to a retracted piston against the bias of the spring, so that the product discharges through the actuator''s orifice, finger release causing the aerosol valve to close, and the pressure within the actuator to drop, resulting in the spring pushing the piston and piston rod forwardly to seal the actuator''s orifice closed. The piston and piston rod form a piston area which relative to the flow rate capacity of the actuator''s orifice, and the position the actuator''s valve stem hole opens into the actuator between its piston and orifice, causes the piston to remain steadily at its retracted position during the discharge of the product. The back end of the actuator has a governor for determining the rate of discharge effected by the actuator through its orifice, this governor being a cap screwed on the back end of the actuator and having an abutment surface against which the piston abuts when forced backwardly by the pressure of the product, thus establishing the retracted position of the piston and piston rod and, therefore, the rate of discharge via the actuator''s orifice. This governor can be screwed forwardly to keep the actuator''orifice sealed even when the actuator is depressed to open the aerosol valve, and by screwing the governor backwardly, discharge via the actuator becomes possible but at a rate governed by the amount the governor is screwed backwardly.
Inventors
- 👤 Robert H Laauwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:20
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/75; B65D83/753; B65D83/7535; B65D83/16; B65D83/164; B65D83/567; B05; B05B; B05B1/00; B05B1/34; B05B1/3405; B05B1/341; B05B1/3421; B05B1/3426; B05B11/00; B05B11/0005; B05B11/0062; B05B11/0064; B05B11/0067; B05B11/01; B05B11/10; B05B11/1001; B05B11/1016
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
256 words
An actuator for dispensing a pressurized product and comprising a Hollow body having an interior and provided with means for receiving the pressurized product in said interior, said body having a front end wall open to said interior and through which a product-discharge orifice is formed, said body containing a valve having a front end normally seating on the inside of said end wall and closing said orifice and means responsive to fluid pressure of said product in said interior for unseating the valve''s front end while said pressure exists and for reseating the valve''s front end when said pressure is substantially reduced, and limit means for controlling the extent said valve can unseat, the valve''s front end and the inside of said front end wall respectively having cooperative, relatively reciprocative male and female parts with one part fixed to the valve''s front end and the other part fixed to the body''s front wall inside, a first of said parts in cross section forming baffle means substantially surrounding said orifice and having circumferential ends which are interspaced to form at least one space through which the pressurized product can flow transversely with respect to said orifice, a second of said parts normally closing said space and slidingly fitting in said first part, unseating of said valve to the extent controlled by said limit means separating said parts axially so pressurized product in said interior can flow through the space between said interspaced ends to the extent said parts are slid apart by unseating of said valve.
Claim 2
Dependent Claim
256 words
An actuator for dispensing a pressurized product and comprising a Hollow body having an interior and provided with means for receiving the pressurized product in said interior, said body having a front end wall open to said interior and through which a product-discharge orifice is formed, said body containing a valve having a front end normally seating on the inside of said end wall and closing said orifice and means responsive to fluid pressure of said product in said interior for unseating the valve''s front end while said pressure exists and for reseating the valve''s front end when said pressure is substantially reduced, and limit means for controlling the extent said valve can unseat, the valve''s front end and the inside of said front end wall respectively having cooperative, relatively reciprocative male and female parts with one part fixed to the valve''s front end and the other part fixed to the body''s front wall inside, a first of said parts in cross section forming baffle means substantially surrounding said orifice and having circumferential ends which are interspaced to form at least one space through which the pressurized product can flow transversely with respect to said orifice, a second of said parts normally closing said space and slidingly fitting in said first part, unseating of said valve to the extent controlled by said limit means separating said parts axially so pressurized product in said interior can flow through the space between said interspaced ends to the extent said parts are slid apart by unseating of said valve.
Claim 3
Dependent Claim
92 words
The actuator of claim 1 in which the first of said parts is fixed to the inside of the body''s said front end wall and said baffle means is formed by curved baffles having their respepctive ends interspaced from each other, and said second of said parts is formed by recesses in the valve''s said front end and which slidingly fit and receive the radially inner and outer sides of said baffles, unseating of the valve withdrawing its front end having said recesses, from the baffle means and said circumferentially interspaced ends.
Claim 4
Dependent Claim
20 words
The actuator of claim 1 in which said limit means is for adjustably limiting the extent said valve can unseat.
Claim 5
Dependent Claim
256 words
An aerosol valve stem actuator comprising a substantially rigid plastic body having a hole formed upwardly therein for receiving said stem and a passage formed therethrough transversely with respect to said hole and into which said hole opens, said body forming a front end wall closing the adjacent end of said passage, said front end wall having a discharge orifice formed therethrough, said passage having at least a back end portion forming a cylinder, said passage containing a substantially rigid slidable plastic reciprocating piston positioned in said cylinder and having a piston rod extending forwardly with a front end engaging said front end wall around said orifice and closing said orifice when said piston is at an advanced position and separating from said front end wall when said piston is at a retracted position, said body having an external back end surface surrounding the back end of said cylinder, said surface having screw threads, a product discharge governor formed by a cap having a side wall with internal screw threads and screwed on the screw threads of said surface, said cap having an internal abutment surface engaged by said piston when in its retracted position and adjustably fixing said position dependent on the position of said cap, and a coil compression spring connected with the inside of said cap and extending forwardly and connected to said piston to bias the piston to its said advanced position with its said piston rod front end engaging said front end wall around said orifice and normally closing said orifice.
Claim 6
Dependent Claim
256 words
An aerosol valve stem actuator comprising a substantially rigid plastic body having a hole formed upwardly therein for receiving said stem and a passage formed therethrough transversely with respect to said hole and into which said hole opens, said body forming a front end wall closing the adjacent end of said passage, said front end wall having a discharge orifice formed therethrough, said passage having at least a back end portion forming a cylinder, said passage containing a substantially rigid slidable plastic reciprocating piston positioned in said cylinder and having a piston rod extending forwardly with a front end engaging said front end wall around said orifice and closing said orifice when said piston is at an advanced position and separating from said front end wall when said piston is at a retracted position, said body having an external back end surface surrounding the back end of said cylinder, said surface having screw threads, a product discharge governor formed by a cap having a side wall with internal screw threads and screwed on the screw threads of said surface, said cap having an internal abutment surface engaged by said piston when in its retracted position and adjustably fixing said position dependent on the position of said cap, and a coil compression spring connected with the inside of said cap and extending forwardly and connected to said piston to bias the piston to its said advanced position with its said piston rod front end engaging said front end wall around said orifice and normally closing said orifice.
Claim 7
Dependent Claim
79 words
The actuator of claim 4 in which said piston and piston rod form a piston area facing said front end, and said discharge orifice has a flow rate capacity at the pressure and constituancy of said product, said area and said rate being relatively proportioned to maintain said pressure applied to said piston at a value holding said piston at its said retracted position continuously as long as said product flows through said passage and through said dispensing orifice.
Claim 8
Dependent Claim
46 words
The actuator of claim 4 in which said hole opens transversely into said passage at a location spaced far enough backwardly from said orifice and towards said piston for the latter to be continuously forced to its said retracted position constantly during maintenance of said flow.
Claim 9
Dependent Claim
41 words
The actuator of claim 4 in which said front end of said piston rod and the inside of said front end body wall respectively have female and male slidingly interfitting elements contoured substantially as curved segments to form a swirl chamber.
Claim 10
Dependent Claim
29 words
The actuator of claim 7 in which said piston rod and the inside of said surface have slidably interfitting guide elements holding said piston rod and piston against rotation.
Claim 11
Dependent Claim
39 words
The actuator of claim 1 in which said governor cap can be removed from said body by unscrewing and said piston and piston rod are removable from said actuator body when said governor cap is removed from said body.
Claim 12
Dependent Claim
29 words
The actuator of claim 9 having means for resisting unscrewing of said governor cap from said actuator body but which may be overridden by forcible unscrewing of said cap.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |