Patent US3344807A successfully refreshed from Google Patents.
US3344807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shut-off valve
Assignee: Individual
•
Filing: 1965-08-27
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Granted: 1967-10-03
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Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Lehrer Fritz
- 👤 Casutt Maximilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:51
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K25/00; F16K25/02; F16K51/00; F16K51/02; Y; Y10; Y10T; Y10T137/00; Y10T137/5762; Y10T137/8158; Y10T137/8326; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/87917; Y10T137/88046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A SHUT-OFF VALVE, WHICH COMPRISES A HOUSING DEFINING A FLUID FLOW PATH, TWO SEATS IN SAID HOUSING, SAID SEATS DEFINING WITH SAID HOUSING A BLOCKING CHAMBER WHICH FORMS PART OF SAID FLUID FLOW PATH, AND TWO VALVE MEMBERS IN SAID HOUSING, EACH OF SAID VALVE MEMBERS BEING MOVABLE TO AND FROM ENGAGEMENT WITH ONE OF SAID SEATS AND BEING ADAPTED TO SEAL SAID BLOCKING CHAMBER IN BOTH DIRECTIONS WHEN BOTH SAID VALVE MEMBERS ARE IN ENGAGEMENT WITH THE RESPECTIVE SEATS, SAID VALVE MEMBERS BEING AXIALLY MOVABLE RELATIVE TO EACH OTHER WHILE IN ENGAGEMENT WITH THEIR RESPECTIVE SEATS SO AS TO VARY THE VOLUME OF SAID BLOCKING CHAMBER.
Claim 2
Dependent Claim
107 words
A SHUT-OFF VALVE, WHICH COMPRISES A HOUSING DEFINING A FLUID FLOW PATH, TWO SEATS IN SAID HOUSING, SAID SEATS DEFINING WITH SAID HOUSING A BLOCKING CHAMBER WHICH FORMS PART OF SAID FLUID FLOW PATH, AND TWO VALVE MEMBERS IN SAID HOUSING, EACH OF SAID VALVE MEMBERS BEING MOVABLE TO AND FROM ENGAGEMENT WITH ONE OF SAID SEATS AND BEING ADAPTED TO SEAL SAID BLOCKING CHAMBER IN BOTH DIRECTIONS WHEN BOTH SAID VALVE MEMBERS ARE IN ENGAGEMENT WITH THE RESPECTIVE SEATS, SAID VALVE MEMBERS BEING AXIALLY MOVABLE RELATIVE TO EACH OTHER WHILE IN ENGAGEMENT WITH THEIR RESPECTIVE SEATS SO AS TO VARY THE VOLUME OF SAID BLOCKING CHAMBER.
References Cited (Backward Citations)
US2111228A
Cited
US2430122A
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US2500156A
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US2821206A
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US2788802A
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US2814447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |