US3145064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake cylinder release valves
Assignee: Sloan Valve Co
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Filing: 1962-10-16
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Granted: 1964-08-18
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Expires: 1982-10-16
Abstract
No abstract record available.
Inventors
- 👤 Henry R Billeter
- 👤 Robert E Campbell
- 👤 Harry I Tramblie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:33
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/36; B60T15/54; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86686
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
199 words
IN A BRAKE CYLINDER RELEASE VALVE, A CASING HAVING A CONNECTION WITH A BRAKE CONTROL VALVE AND A CONNECTION WITH A BRAKE CYLINDER, A VALVE STEM IN SAID CASING HAVING A DOUBLE ACTING VALVE MEMBER ON ONE END AND A PISTON SLIDABLE IN SAID CASING ON THE OTHER END, A VALVE SEAT IN SAID CASING OPENED BY SAID VALVE MEMBER TO PERMIT FREE PASSAGE OF AIR PRESSURE FROM SAID BRAKE CONTROL VALVE TO SAID BRAKE CYLINDER, A SPRING ON SAID VALVE STEM BIASING SAID VALVE MEMBER IN SAID OPEN POSITION, MANUAL OPERATED MEANS IN SAID CASING FOR ACTUATING SAID VALVE STEM TO MOVE SAID VALVE MEMBER TO CLOSE ON SAID VALVE SEAT AND DISCONNECT THE AIR PRESSURE FROM SAID BRAKE CYLINDER WHILE RETAINING THE AIR PRESSURE FROM SAID BRAKE CONTROL VALVE, SAID RETAINED AIR PRESSURE BEING EFFECTIVE ON ONE SIDE OF SAID PISTON OPPOSED TO SAID SPRING TO HOLD SAID VALVE STEM AND VALVE MEMBER IN ACTUATED POSITION AFTER SAID MANUAL OPERATING MEANS IS RELEASED, A SECOND VALVE SEAT NORMALLY CLOSED BY SAID VALVE MEMBER AND OPENED UPON MOVEMENT OF SAID VALVE MEMBER TO EXHAUST THE AIR PRESSURE TO ATMOSPHERE FROM SAID BRAKE CYLINDER, A RELIEF VALVE IN SAID
Claim 2
Dependent Claim
199 words
IN A BRAKE CYLINDER RELEASE VALVE, A CASING HAVING A CONNECTION WITH A BRAKE CONTROL VALVE AND A CONNECTION WITH A BRAKE CYLINDER, A VALVE STEM IN SAID CASING HAVING A DOUBLE ACTING VALVE MEMBER ON ONE END AND A PISTON SLIDABLE IN SAID CASING ON THE OTHER END, A VALVE SEAT IN SAID CASING OPENED BY SAID VALVE MEMBER TO PERMIT FREE PASSAGE OF AIR PRESSURE FROM SAID BRAKE CONTROL VALVE TO SAID BRAKE CYLINDER, A SPRING ON SAID VALVE STEM BIASING SAID VALVE MEMBER IN SAID OPEN POSITION, MANUAL OPERATED MEANS IN SAID CASING FOR ACTUATING SAID VALVE STEM TO MOVE SAID VALVE MEMBER TO CLOSE ON SAID VALVE SEAT AND DISCONNECT THE AIR PRESSURE FROM SAID BRAKE CYLINDER WHILE RETAINING THE AIR PRESSURE FROM SAID BRAKE CONTROL VALVE, SAID RETAINED AIR PRESSURE BEING EFFECTIVE ON ONE SIDE OF SAID PISTON OPPOSED TO SAID SPRING TO HOLD SAID VALVE STEM AND VALVE MEMBER IN ACTUATED POSITION AFTER SAID MANUAL OPERATING MEANS IS RELEASED, A SECOND VALVE SEAT NORMALLY CLOSED BY SAID VALVE MEMBER AND OPENED UPON MOVEMENT OF SAID VALVE MEMBER TO EXHAUST THE AIR PRESSURE TO ATMOSPHERE FROM SAID BRAKE CYLINDER, A RELIEF VALVE IN SAID
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |