Patent US3240538A successfully refreshed from Google Patents.
US3240538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer brake fluid system including a mechanical lock
Assignee: Bendix Westinghouse Automotive Air Brake Co
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Filing: 1964-02-14
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Granted: 1966-03-15
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Expires: 1984-02-14
Abstract
No abstract record available.
Inventors
- 👤 Harry M Valentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:34
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/26; B60T13/268; B60T13/40; B60T13/403; B60T17/00; B60T17/08; B60T17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN COMBINATION WITH A FLUID PRESSURE BRAKING SYSTEM WHICH INCLUDES A BRAKE ACTUATOR, A FLUID PRESSURE RELEASED, SPRING APPLIED BRAKE LOCKING MEANS FOR LOCKING THE ACTUATOR IN APPLIED POSITION, SERVICE AND LOCK PORTS IN SAID ACTUATOR, AN EMERGENCY RESERVOIR, A RELAY-EMERGENCY VALVE CONNECTED TO SAID RESERVOIR AND HAVING CONTROL, EMERGENCY AND OUTLET PORTS, EMERGENCY AND SERVICE LINES CONNECTED RESPECTIVELY TO SAID EMERGENCY AND CONTROL PORTS, AND FLUID CONDUIT MEANS INTERCONNECTING SAID OUTLET PORT AND THE SERVICE PORT OF SAID ACTUATOR, THE INVENTION WHICH COMPRISES A CONDUIT INTERCONNECTING SAID EMERGENCY LINE AND THE FLUID CONDUIT MEANS LEADING TO THE SERVICE PORT OF SAID ACTUATOR, A ONE WAY CHECK VALVE IN SAID CONDUIT ARRANGED TO PERMIT FLUID FLOW FROM SAID ACTUATOR TO SAID EMERGENCY LINE BUT NOT IN THE REVERSE DIRECTION, FIRST AND SECOND CHOKES SERIALLY ARRANGED IN SAID LAST NAMED CONDUIT BETWEEN SAID CHECK VALVE AND SAID EMERGENCY LINE, AND BRANCH CONDUIT MEANS HAVING ONE END CONNECTED TO SAID LAST NAMED CONDUIT BETWEEN SAID CHOKES AND THE OTHER END CONNECTED TO THE LOCK PORT OF SAID ACTUATOR.
Claim 2
Dependent Claim
176 words
IN COMBINATION WITH A FLUID PRESSURE BRAKING SYSTEM WHICH INCLUDES A BRAKE ACTUATOR, A FLUID PRESSURE RELEASED, SPRING APPLIED BRAKE LOCKING MEANS FOR LOCKING THE ACTUATOR IN APPLIED POSITION, SERVICE AND LOCK PORTS IN SAID ACTUATOR, AN EMERGENCY RESERVOIR, A RELAY-EMERGENCY VALVE CONNECTED TO SAID RESERVOIR AND HAVING CONTROL, EMERGENCY AND OUTLET PORTS, EMERGENCY AND SERVICE LINES CONNECTED RESPECTIVELY TO SAID EMERGENCY AND CONTROL PORTS, AND FLUID CONDUIT MEANS INTERCONNECTING SAID OUTLET PORT AND THE SERVICE PORT OF SAID ACTUATOR, THE INVENTION WHICH COMPRISES A CONDUIT INTERCONNECTING SAID EMERGENCY LINE AND THE FLUID CONDUIT MEANS LEADING TO THE SERVICE PORT OF SAID ACTUATOR, A ONE WAY CHECK VALVE IN SAID CONDUIT ARRANGED TO PERMIT FLUID FLOW FROM SAID ACTUATOR TO SAID EMERGENCY LINE BUT NOT IN THE REVERSE DIRECTION, FIRST AND SECOND CHOKES SERIALLY ARRANGED IN SAID LAST NAMED CONDUIT BETWEEN SAID CHECK VALVE AND SAID EMERGENCY LINE, AND BRANCH CONDUIT MEANS HAVING ONE END CONNECTED TO SAID LAST NAMED CONDUIT BETWEEN SAID CHOKES AND THE OTHER END CONNECTED TO THE LOCK PORT OF SAID ACTUATOR.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |