Patent US2094531A successfully refreshed from Google Patents.
Patent US3198207A successfully refreshed from Google Patents.
US3198207A
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Fluid pressure controlled shut-off valve responsive to predetermined line pressures
Assignee: Individual
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Filing: 1961-11-14
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Granted: 1965-08-03
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 William J Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:00
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; F; F16; F16K; F16K31/00; F16K31/12; F16K31/122; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7758; Y10T137/7762; Y10T137/7769; Y10T137/777
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A FLUID PRESSURE OPERATED SHUT-OFF VALVE COMPRISING: A VALVE HOUSING HAVING A FLOW PASSAGE THERETHROUGH; SAID HOUSING ALSO HAVING A PISTON CHAMBER; MAIN VALVE MEANS FOR CONTROLLING THE FLOW OF FLUID THROUGH SAID PASSAGE INCLUDING A DIFFERENTIAL END AREA PISTON HAVING ITS LARGER END RECIPROCABLE IN SAID CHAMBER TO MOVE SAID MAIN VALVE MEANS BETWEEN FIRST AND SECOND POSITIONS FOR OPENING AND CLOSING SAID PASSAGE; SAID HOUSING HAVING A PASSAGEWAY LEADING FROM SAID PASSAGE TO SAID CHAMBER AT ONE SIDE OF SAID LARGER END; NORMALLY OPEN PILTO VALVE MEANS FOR CLOS-
Claim 2
Dependent Claim
91 words
A FLUID PRESSURE OPERATED SHUT-OFF VALVE COMPRISING: A VALVE HOUSING HAVING A FLOW PASSAGE THERETHROUGH; SAID HOUSING ALSO HAVING A PISTON CHAMBER; MAIN VALVE MEANS FOR CONTROLLING THE FLOW OF FLUID THROUGH SAID PASSAGE INCLUDING A DIFFERENTIAL END AREA PISTON HAVING ITS LARGER END RECIPROCABLE IN SAID CHAMBER TO MOVE SAID MAIN VALVE MEANS BETWEEN FIRST AND SECOND POSITIONS FOR OPENING AND CLOSING SAID PASSAGE; SAID HOUSING HAVING A PASSAGEWAY LEADING FROM SAID PASSAGE TO SAID CHAMBER AT ONE SIDE OF SAID LARGER END; NORMALLY OPEN PILTO VALVE MEANS FOR CLOS-
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |