Patent US3598504A successfully refreshed from Google Patents.
US3598504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-regulating aspirator
Assignee: Individual
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Filing: 1969-10-29
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Granted: 1971-08-10
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Expires: 1989-10-29
Abstract
Abstract This invention relates to a self-regulating device for inflating emergency survival equipment such as is used on airplanes and it uses highly compressed air from a tank to entrain a large amount of atmospheric air to increase the volume of the inflation air obtainable only from the tank. The device comprises a cylindrical housing having a valve seat therein, a centrally disposed outlet conduit of unique construction for emission of the compressed gas from the tank, and a coacting spring-loaded piston also of unique construction and adapted to engage said valve seat of said housing to seal off the fully inflated equipment from the atmosphere.
Inventors
- 👤 Vincent F Siravo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:10
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A compressed air actuated aspirator for entraining atmospheric air comprising a housing having a front cup-shaped portion, a middle sloped valve seat portion and a rear outlet portion; bonnet means engaging said housing front portion for securing said housing to an inflatable bag wall; a tubular post disposed within said cup-shaped housing portion and fixedly secured to said bonnet means and having a solid round headplate; a tubular cylindrical piston having a large diameter cup-shaped portion disposed in critical predetermined annular relationship around said headplate, said large diameter cup-shaped portion having a valve lip adapted to engage said valve seat portion of said housing; and spring means engaging said piston and said bonnet means for continuously urging said piston into valve closure relationship to said housing.
Claim 2
Dependent Claim
126 words
A compressed air actuated aspirator for entraining atmospheric air comprising a housing having a front cup-shaped portion, a middle sloped valve seat portion and a rear outlet portion; bonnet means engaging said housing front portion for securing said housing to an inflatable bag wall; a tubular post disposed within said cup-shaped housing portion and fixedly secured to said bonnet means and having a solid round headplate; a tubular cylindrical piston having a large diameter cup-shaped portion disposed in critical predetermined annular relationship around said headplate, said large diameter cup-shaped portion having a valve lip adapted to engage said valve seat portion of said housing; and spring means engaging said piston and said bonnet means for continuously urging said piston into valve closure relationship to said housing.
Claim 3
Dependent Claim
29 words
The aspirator of claim 1 wherein said housing is an integral unit and said outlet portion is provided with a conical sloped wall to produce a venturi suction effect.
Claim 4
Dependent Claim
21 words
The aspirator of claim 2 wherein the tubular post is provided with a plurality of outlet ports immediately behind said headplate.
Claim 5
Dependent Claim
13 words
The aspirator of claim 3 wherein said spring means is a compression spring.
Claim 6
Dependent Claim
78 words
The aspirator of claim 4 wherein said bonnet means comprises an integral circular plate having an outer rim portion having a plurality of suitably spaced-apart apertures, a plurality of integral spaced-apart arms and an integral hub adapted to fixedly receive said post; and a circular collar having a plurality of suitably spaced-apart threaded cavities slidably mounted over said cup-shaped housing portion whereby a suitably apertured inflatable bag wall is hermetically bolted between said circular plate and said collar.
Claim 7
Dependent Claim
41 words
The aspirator of claim 5 wherein said valve lip of said cup-shaped piston portion is provided with a circular channel and an O-ring is disposed therein to produce an air leak-proof seal to the sloped valve seat wall of said housing.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |