US3272565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway fluid pressure brake apparatus
Assignee: Westinghouse Air Brake Co
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Filing: 1964-08-31
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Granted: 1966-09-13
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Richard L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/18; B60T15/24; B60T15/30; B60T15/302; B60T15/304; B60T15/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN A FLUID PRESSURE BRAKE SYSTEM FOR RAILWAY LOCOMOTIVES AND CARS, THE COMBINATION OF: (A) A BRAKE PIPE NORMALLY CHARGED WITH FLUID AT A CERTAIN PRESSURE, (B) A SELECTOR VOLUME RESERVOIR NORMALLY CHARGED WITH FLUID AT SAID CERTAIN PRESSURE, AND (C) A BRAKE CONTROL VALVE DEVICE ON THE LOCOMOTIVE HAVING: (I) A SERVICE VALVE DEVICE RESPONSIVE, RESPECTIVELY, TO A REDUCTION IN BRAKE PIPE PRESSURE FROM SAID CERTAIN PRESSURE TO EFFECT A BRAKE APPLICATION, AND TO AN INCREASE IN BRAKE PIPE PRESSURE TO EFFECT A BRAKE RELEASE, AND (II) SELECTOR VALVE MEANS CONTROLLING A CHARGING COMMUNICATION THROUGH WHICH FLUID UNDER PRESSURE MAY NORMALLY FLOW FROM THE BRAKE PIPE TO THE SELECTOR VOLUME RESERVOIR, AND TWO RELEASE COMMUNICATIONS OF DIFFERENT FLOW CAPACITIES VIA WHICH FLUID UNDER PRESSURE MAY BE RELEASED RESPECTIVELY FROM THE BRAKE PIPE AT A RELATIVALY SLOW RATE AND FROM THE SELECTOR VOLUME RESERVOIR AT A FASTER RATE, (III) SAID SELECTOR VALVE MEANS BEING SUBJECT OPPOSINGLY TO BRAKE PIPE PRESSURE AND SELECTOR VOLUME RESERVOIR PRESSURE AND RESPONSIVE TO AN INITIAL REDUCTION IN BRAKE PIPE PRESSURE TO BE-
Claim 2
Dependent Claim
177 words
IN A FLUID PRESSURE BRAKE SYSTEM FOR RAILWAY LOCOMOTIVES AND CARS, THE COMBINATION OF: (A) A BRAKE PIPE NORMALLY CHARGED WITH FLUID AT A CERTAIN PRESSURE, (B) A SELECTOR VOLUME RESERVOIR NORMALLY CHARGED WITH FLUID AT SAID CERTAIN PRESSURE, AND (C) A BRAKE CONTROL VALVE DEVICE ON THE LOCOMOTIVE HAVING: (I) A SERVICE VALVE DEVICE RESPONSIVE, RESPECTIVELY, TO A REDUCTION IN BRAKE PIPE PRESSURE FROM SAID CERTAIN PRESSURE TO EFFECT A BRAKE APPLICATION, AND TO AN INCREASE IN BRAKE PIPE PRESSURE TO EFFECT A BRAKE RELEASE, AND (II) SELECTOR VALVE MEANS CONTROLLING A CHARGING COMMUNICATION THROUGH WHICH FLUID UNDER PRESSURE MAY NORMALLY FLOW FROM THE BRAKE PIPE TO THE SELECTOR VOLUME RESERVOIR, AND TWO RELEASE COMMUNICATIONS OF DIFFERENT FLOW CAPACITIES VIA WHICH FLUID UNDER PRESSURE MAY BE RELEASED RESPECTIVELY FROM THE BRAKE PIPE AT A RELATIVALY SLOW RATE AND FROM THE SELECTOR VOLUME RESERVOIR AT A FASTER RATE, (III) SAID SELECTOR VALVE MEANS BEING SUBJECT OPPOSINGLY TO BRAKE PIPE PRESSURE AND SELECTOR VOLUME RESERVOIR PRESSURE AND RESPONSIVE TO AN INITIAL REDUCTION IN BRAKE PIPE PRESSURE TO BE-
References Cited (Backward Citations)
US3018138A
Cited
US2937906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |