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US3913803A Expired / Lapsed US ⏱️ 0.0 years remaining

Aerosol valve actuator with front end discharge governor

Assignee: Inopak Ltd
•
Filing: 1974-12-20
•
Granted: 1975-10-21
•
Expires: 1994-12-20
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Abstract

Abstract An aerosol valve actuator has a body in which a forwardly open cavity is formed and which contains in its forward end a reciprocating piston in which a discharge orifice is formed, a rod or probe extending from the closed back end of the cavity forwardly and having a front end which normally closes the discharge orifice when the piston is at a backward position, but opens this orifice when the piston reciprocates forwardly to leave the front end of the rod or probe. A hole opens transversely through the body and into the back end portion of the cavity and this hole is proportioned for a press fit on the usual tubular valve stem through which a packaged pressurized product is dispensed when the stem is depressed. The actuator is used for depressing the stem by finger pressure. The front end of the body has a cap or retainer screwed on it to hold the piston normally backwardly against the front end of the rod, unscrewing of this cap freeing the piston for forward movement and orificeopening action. When the cap is unscrewed to place the actuator in its ready condition, a coil spring positioned between the cap and the piston biases the piston backwardly so that the orifice remains normally closed, the orifice opening when the actuator receives the pressurized product which then applies its pressure against the piston to push it forwardly to the limit determined by the extent with which the front cap is unscrewed. Thus, the cap acts as a governor controlling the extent the discharged valve opens and, therefore, the nature of the discharge of the pressurized product. This governor is positioned on the front end of the actuator.

Inventors

  • 👤 Robert H Laauwe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 06:49
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/44

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 150 words
An actuator for a tubular stem through which a pressurized product is dispensed, comprising a body having a substantially cylindrical cavity with a closed end back wall and an open front end, said body having a hole opening into said cavity adjacent to said back wall and adapted to receive said stem said body having a rod projecting from said back wall towards said open front end, a piston reciprocating in said cavity and having a discharge orifice and otherwise closing said open end, said rod having a front end positioned to close said orifice when said piston moves backwardly against said rod and to open said orifice when said piston moves forwardly, spring means for biasing said piston backwardly so that the rods said front end normally closes said orifice, and adjustable governor means on the front end of said body for adjustably limiting forward movement of said piston.
Claim 2
Dependent Claim 150 words
An actuator for a tubular stem through which a pressurized product is dispensed, comprising a body having a substantially cylindrical cavity with a closed end back wall and an open front end, said body having a hole opening into said cavity adjacent to said back wall and adapted to receive said stem said body having a rod projecting from said back wall towards said open front end, a piston reciprocating in said cavity and having a discharge orifice and otherwise closing said open end, said rod having a front end positioned to close said orifice when said piston moves backwardly against said rod and to open said orifice when said piston moves forwardly, spring means for biasing said piston backwardly so that the rods said front end normally closes said orifice, and adjustable governor means on the front end of said body for adjustably limiting forward movement of said piston.
Claim 3
Dependent Claim 64 words
The actuator of claim 1 in which said body has external screw threads on the outside of its front and around its said open front end and said governor means is a cap having a skirt with internal screw threads threaded on said external screw threads, said cap having an opening registered with said discharge orifice and an inside surface engagable by said piston.
Claim 4
Dependent Claim 34 words
The actuator of claim 2 in which said piston has a forwardly facing annular recess and said spring means is a coil spring positioned in said recess and engaging the cap''s said inside surface.
Claim 5
Dependent Claim 47 words
The actuator of claim 1 in which said piston has backwardly extending vane means forming at least one transversely extending passage, and said rod''s said front end fitting slidably within said vane means and normally closing said passage and opening the latter when said piston moves forwardly.
Claim 6
Dependent Claim 26 words
The actuator of claim 4 in which the rod''s said front end has female recesses receiving said vane means with the latter then being male means.

References Cited (Backward Citations)

US2016037A Cited
US3712517A Cited

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

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