Patent US3265448A successfully refreshed from Google Patents.
US3265448A
Expired / Lapsed
US
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Fluid pressure brake control apparatus
Assignee: Westinghouse Air Brake Co
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Filing: 1965-02-18
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Granted: 1966-08-09
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Expires: 1985-02-18
Abstract
No abstract record available.
Inventors
- 👤 George K Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:03
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/18; B60T15/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A FLUID PRESSURE RELAY VALVE DEVICE FOR INTERPOSITION BETWEEN TWO SECTIONS OF A BRAKE PIPE ON A TRAIN OF CARS, SAID RELAY VALVE DEVICE COMPRISING: (A) PILOT VALVE MEANS POSITIONABLE IN ONE OR THE OTHER OF TWO DIFFERENT OPERATING POSITIONS DEPENDING UPON THE SECTION OF BRAKE PIPE FIRST CHARGED WITH FLUID PRESSURE, AND (B) SELF-LAPPING VALVE MEANS COOPERATIVE WITH SAID PILOT VALVE MEANS IN ITS SAID ONE POSITION AND OPERATIVELY RESPONSIVE TO AN INCREASE OR DECREASE OF
Claim 2
Dependent Claim
77 words
A FLUID PRESSURE RELAY VALVE DEVICE FOR INTERPOSITION BETWEEN TWO SECTIONS OF A BRAKE PIPE ON A TRAIN OF CARS, SAID RELAY VALVE DEVICE COMPRISING: (A) PILOT VALVE MEANS POSITIONABLE IN ONE OR THE OTHER OF TWO DIFFERENT OPERATING POSITIONS DEPENDING UPON THE SECTION OF BRAKE PIPE FIRST CHARGED WITH FLUID PRESSURE, AND (B) SELF-LAPPING VALVE MEANS COOPERATIVE WITH SAID PILOT VALVE MEANS IN ITS SAID ONE POSITION AND OPERATIVELY RESPONSIVE TO AN INCREASE OR DECREASE OF
References Cited (Backward Citations)
US2133575A
Cited
US3173483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |