Patent US3302982A successfully refreshed from Google Patents.
US3302982A
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Load-dependent empty-load valve
Assignee: Westinghouse Bremsen und Apparatebau GmbH
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Filing: 1966-03-18
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Granted: 1967-02-07
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Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Pekrul Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1812; B60T8/1825; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A BRAKE PRESSURE REGULATOR VALVE DEPENDENT ON VEHICLE LOAD FOR CONTROLLING THE APPLICATION OF FLUID PRESSURE FROM AN INLET TO AN OUTLET AND THENCE TO A BRAKE CYLINDER COMPRISING VIA A DIFFERENTIAL PRESSURE RESPONSIVE MEMBER HAVING A CHANGEABLE RATIO OF ITS EFFECTIVE SURFACES AND INCLUDING A DOUBLE SEAT VALVE DEVICE, SAID MEMBER HAVING A CONSTANT EFFECTIVE SURFACE SUBJECTED TO THE PRESSURE AT SAID INLET AND A VARIABLE EFFECTIVE SURFACE SUBJECTED ON ONE SIDE TO THE PRESSURE AT SAID OUTLET, A SHUT OFF VALVE FOR SUBJECTING THE OPPOSITE SIDE OF SAID VARIABLE EFFECTIVE SURFACE TO THE PRESSURE AT SAID
Claim 2
Dependent Claim
98 words
A BRAKE PRESSURE REGULATOR VALVE DEPENDENT ON VEHICLE LOAD FOR CONTROLLING THE APPLICATION OF FLUID PRESSURE FROM AN INLET TO AN OUTLET AND THENCE TO A BRAKE CYLINDER COMPRISING VIA A DIFFERENTIAL PRESSURE RESPONSIVE MEMBER HAVING A CHANGEABLE RATIO OF ITS EFFECTIVE SURFACES AND INCLUDING A DOUBLE SEAT VALVE DEVICE, SAID MEMBER HAVING A CONSTANT EFFECTIVE SURFACE SUBJECTED TO THE PRESSURE AT SAID INLET AND A VARIABLE EFFECTIVE SURFACE SUBJECTED ON ONE SIDE TO THE PRESSURE AT SAID OUTLET, A SHUT OFF VALVE FOR SUBJECTING THE OPPOSITE SIDE OF SAID VARIABLE EFFECTIVE SURFACE TO THE PRESSURE AT SAID
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |