US3570704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure cookers
Assignee: Individual
•
Filing: 1966-07-07
•
Granted: 1971-03-16
•
Expires: 1986-07-07
Abstract
Abstract Pressure cooker with a simple and easily operable valve system which includes a stopper with an external counterweight that can be optionally lifted with a manually rotatable cam system. A twopart food carrying grid may be inserted which has means for supporting the same a certain distance from the inner bottom of the cooker. A deformable, annular gasket is used between the lid and the inwardly turned rim of the cooker vessel, the gasket having a projection, which is in intimate sealing contact with portions of the lid and the rim, except for an outer side surface which has freedom of expansion when the gasket is deformed in its sealing position. The projection may be given different transitional engaging areas.
Inventors
- 👤 Benjamin Juan Roson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:12
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/08; Y; Y10; Y10S; Y10S277/00; Y10S277/921
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
211 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage, including counterweight means disposed above said lid, said stopper means being capable to be lifted off its seat in said valve passage under action of the internal pressure in said vessel, against the weight exerted by said counterweight means, said stopper means further including a valve stem passing through said valve passage and extending therebeyond, said counterweight means being attached to the outer end of said stem, the latter as well as said counterweight means being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said lid includes rotatable cam means for optionally lifting said stopper means from said valve passage in an angularly displaced position of said cam means.
Claim 2
Dependent Claim
211 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage, including counterweight means disposed above said lid, said stopper means being capable to be lifted off its seat in said valve passage under action of the internal pressure in said vessel, against the weight exerted by said counterweight means, said stopper means further including a valve stem passing through said valve passage and extending therebeyond, said counterweight means being attached to the outer end of said stem, the latter as well as said counterweight means being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said lid includes rotatable cam means for optionally lifting said stopper means from said valve passage in an angularly displaced position of said cam means.
Claim 3
Dependent Claim
169 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage capable of being lifted off its seat in said valve passage under action of the internal pressure in said vessel, agaiNst the weight exerted by said stopper means, the latter including a valve stem passing through said valve passage and extending therebeyond, said stem being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said stem has a plurality of grooves defining further ones of said fluid passages.
Claim 4
Dependent Claim
169 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage capable of being lifted off its seat in said valve passage under action of the internal pressure in said vessel, agaiNst the weight exerted by said stopper means, the latter including a valve stem passing through said valve passage and extending therebeyond, said stem being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said stem has a plurality of grooves defining further ones of said fluid passages.
Claim 5
Dependent Claim
15 words
The pressure cooker as defined in claim 2, comprising two of said gravity valve means.
Claim 6
Dependent Claim
195 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage capable of being lifted off its seat in said valve passage under action of the internal pressure in said vessel, against the weight exerted by said stopper means, the latter including a valve stem passing through said valve passage and extending therebeyond, said stem being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said lid includes cam means for optionally lifting said stopper means from said valve passage, and wherein said cam means are arranged on a rod rotatably mounted on said lid and having operating means spaced away from said cam means.
Claim 7
Dependent Claim
195 words
A pressure cooker comprising a vessel having an inwardly turned flanged free rim, a lid for forming a sealing closure when applied against said rim, and at least one gravity valve means, the latter including a valve passage arranged in said lid in communication with the inside of said vessel, stopper means for said valve passage capable of being lifted off its seat in said valve passage under action of the internal pressure in said vessel, against the weight exerted by said stopper means, the latter including a valve stem passing through said valve passage and extending therebeyond, said stem being permanently acted upon by said internal pressure, at least one fluid passage being provided between said stem and the internal wall of said valve passage to allow discharge of fluid under pressure from said inside to the atmosphere when said internal pressure is sufficiently high to lift said stopper means from said seat, wherein said lid includes cam means for optionally lifting said stopper means from said valve passage, and wherein said cam means are arranged on a rod rotatably mounted on said lid and having operating means spaced away from said cam means.
Claim 8
Dependent Claim
38 words
The pressure cooker as defined in claim 4, wherein said cam means consist of a bent portion of said rod disposed beneath said stopper means, for lifting said stopper means upon rotation of said rod about its axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |