Patent US3138174A successfully refreshed from Google Patents.
US3138174A
Expired / Lapsed
US
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Automatic excess fluid flow valve
Assignee: Individual
•
Filing: 1961-11-13
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Granted: 1964-06-23
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Expires: 1981-11-13
Abstract
No abstract record available.
Inventors
- 👤 William V Gilpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:00
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/34; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7785; Y10T137/7787; Y10T137/7791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
AN AUTOMATIC EXCESS FLUID FLOW VALVE COMPRISING: A T HAVING AN OUTLET IN ITS LEG AND A RESTRICTIVE ORIFICE IN AN INLET ARM, THE OTHER ARM BEING INTERNALLY THREADED; A PISTON LOOSELY SLIDEABLY MOUNTED WITHIN THE ARMS, INCLUDING A PORTION ADAPTED AND ARRANGED TO SEAT AGAINST THE OUTLET SIDE OF THE ORIFICE, AND FURTHER INCLUDING A PRESSURE-TRANSMITTING TUBE EXTENDING FROM BEYOND THE INLET SIDE OF THE ORIFICE TO AN END OF A CHAMBER WITHIN THE PISTON; A PLUG WITH A CENTRAL APERTURE, THREADABLY ENGAGED WITH THE INSIDE OF THE OTHER ARM; AN ADJUSTING SCREW THREADABLY ENGAGED WITH THE CENTRAL APERTURE, EXTENDING INTO THE PISTON CHAMBER AND INCLUDING END MEANS FOR BLOCKING THE TUBE AT ITS JUNCTURE WITH THE CHAMBER; A SPRING MOUNTED BETWEEN THE END MEANS AND THE END OF A CHAMBER OPPOSITE THE TUBE END; AND MEANS FOR LOCKING THE ADJUSTING SCREW; THE PISTON BEING DESIGNED SO THAT PRESSURE-INDUCED FORCE UNDER CONDITIONS OF EXCESS FLOW IS SUFFICIENT TO OVERCOME THE BIAS OF THE SPRING AND FORCE THE PISTON CLOSED AGAINST THE ORIFICE.
Claim 2
Dependent Claim
173 words
AN AUTOMATIC EXCESS FLUID FLOW VALVE COMPRISING: A T HAVING AN OUTLET IN ITS LEG AND A RESTRICTIVE ORIFICE IN AN INLET ARM, THE OTHER ARM BEING INTERNALLY THREADED; A PISTON LOOSELY SLIDEABLY MOUNTED WITHIN THE ARMS, INCLUDING A PORTION ADAPTED AND ARRANGED TO SEAT AGAINST THE OUTLET SIDE OF THE ORIFICE, AND FURTHER INCLUDING A PRESSURE-TRANSMITTING TUBE EXTENDING FROM BEYOND THE INLET SIDE OF THE ORIFICE TO AN END OF A CHAMBER WITHIN THE PISTON; A PLUG WITH A CENTRAL APERTURE, THREADABLY ENGAGED WITH THE INSIDE OF THE OTHER ARM; AN ADJUSTING SCREW THREADABLY ENGAGED WITH THE CENTRAL APERTURE, EXTENDING INTO THE PISTON CHAMBER AND INCLUDING END MEANS FOR BLOCKING THE TUBE AT ITS JUNCTURE WITH THE CHAMBER; A SPRING MOUNTED BETWEEN THE END MEANS AND THE END OF A CHAMBER OPPOSITE THE TUBE END; AND MEANS FOR LOCKING THE ADJUSTING SCREW; THE PISTON BEING DESIGNED SO THAT PRESSURE-INDUCED FORCE UNDER CONDITIONS OF EXCESS FLOW IS SUFFICIENT TO OVERCOME THE BIAS OF THE SPRING AND FORCE THE PISTON CLOSED AGAINST THE ORIFICE.
References Cited (Backward Citations)
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |