Patent US3169453A successfully refreshed from Google Patents.
US3169453A
Expired / Lapsed
US
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Valve
Assignee: New York Air Brake LLC
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Filing: 1962-03-26
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Granted: 1965-02-16
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Expires: 1982-03-26
Abstract
No abstract record available.
Inventors
- 👤 Robert C Westveer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:34
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/01; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
235 words
FOR USE IN CONJUNCTION WITH A REVERSIBLE, POSITIVE DISPLACEMENT MOTOR AND A REVERSING VALVE HAVING A SUPPLY CHAMBER AND ARRANGED TO CONTROL SAID MOTOR, AN ANTICAVITATION VALVE INTERPOSED IN ONE OF THE LINES INTERCONNECTING THE MOTOR AND THE REVERSING VALVE COMPRISING A HOUSING HAVING A BORE EXTENDING THERETHROUGH; A VALVE SEAT IN SAID BORE; A SKIRTED CHECK VALVE MEMBER OPENING WITH SAID VALVE SEAT; A RELATIVELY LIGHT SPRING URGING THE CHECK VALVE TOWARD THE SEAT, SAID CHECK VALVE OPENING AGAINST THE SPRING BIAS TO PERMIT FLOW TOWARD THE MOTOR; A SLEEVE PISTON SLIDABLE IN A COUNTERBORE FORMED IN THE BORE IN SAID HOUSING AND ENCIRCLING THE SKIRT OF THE CHECK VALVE; MEANS PROVIDING ONE WAY THRUST ENGAGEMENT BETWEEN SAID SLEEVE PISTON WHEREBY THE CHECK VALVE MAY BE RAISED FROM ITS SEAT BY SAID PISTON; A GRADUATING SPRING, HEAVIER THAN THE CHECK VALVE SPRING URGING SAID SLEEVE PISTON TOWARD A POSITION IN WHICH SAID CHECK VALVE IS PERMITTED TO SEAT; A WORKING SPACE DEFINED BY THE BORE, THE END OF THE SLEEVE PISTON BEING LARGER THAN THAT OF END FACE OF THE SLEEVE PISTON BEING LARGER THAN THAT OF THE VALVE SEAT; MEANS TO ADMIT PRESSURE FROM THE SUPPLY CHAMBER OF THE REVERSING VALVE TO SAID WORKING SPACE; AN ANNULAR PLUG CARRYING A CYLINDRICAL FLANGE, SAID PLUG BEING RECEIVED IN THE END OF SAID COUNTERBORE WITH THE FLANGE EXTENDING INTO SEALING ENGAGEMENT WITH SAID SLEEVE PISTON,
Claim 2
Dependent Claim
235 words
FOR USE IN CONJUNCTION WITH A REVERSIBLE, POSITIVE DISPLACEMENT MOTOR AND A REVERSING VALVE HAVING A SUPPLY CHAMBER AND ARRANGED TO CONTROL SAID MOTOR, AN ANTICAVITATION VALVE INTERPOSED IN ONE OF THE LINES INTERCONNECTING THE MOTOR AND THE REVERSING VALVE COMPRISING A HOUSING HAVING A BORE EXTENDING THERETHROUGH; A VALVE SEAT IN SAID BORE; A SKIRTED CHECK VALVE MEMBER OPENING WITH SAID VALVE SEAT; A RELATIVELY LIGHT SPRING URGING THE CHECK VALVE TOWARD THE SEAT, SAID CHECK VALVE OPENING AGAINST THE SPRING BIAS TO PERMIT FLOW TOWARD THE MOTOR; A SLEEVE PISTON SLIDABLE IN A COUNTERBORE FORMED IN THE BORE IN SAID HOUSING AND ENCIRCLING THE SKIRT OF THE CHECK VALVE; MEANS PROVIDING ONE WAY THRUST ENGAGEMENT BETWEEN SAID SLEEVE PISTON WHEREBY THE CHECK VALVE MAY BE RAISED FROM ITS SEAT BY SAID PISTON; A GRADUATING SPRING, HEAVIER THAN THE CHECK VALVE SPRING URGING SAID SLEEVE PISTON TOWARD A POSITION IN WHICH SAID CHECK VALVE IS PERMITTED TO SEAT; A WORKING SPACE DEFINED BY THE BORE, THE END OF THE SLEEVE PISTON BEING LARGER THAN THAT OF END FACE OF THE SLEEVE PISTON BEING LARGER THAN THAT OF THE VALVE SEAT; MEANS TO ADMIT PRESSURE FROM THE SUPPLY CHAMBER OF THE REVERSING VALVE TO SAID WORKING SPACE; AN ANNULAR PLUG CARRYING A CYLINDRICAL FLANGE, SAID PLUG BEING RECEIVED IN THE END OF SAID COUNTERBORE WITH THE FLANGE EXTENDING INTO SEALING ENGAGEMENT WITH SAID SLEEVE PISTON,
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |