US3205020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake mechanism
Assignee: Bendix Westinghouse Automotive Air Brake Co
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Filing: 1963-08-14
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Granted: 1965-09-07
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Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Frank R Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:54
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/26; B60T13/268; B60T13/40; B60T13/403; B60T15/00; B60T15/02; B60T17/00; B60T17/08; B60T17/081; B60T17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A FLUID PRESSURE SAFETY BRAKE SYSTEM FOR A TRAILER OF THE TYPE HAVING A BRAKE ACTUATOR FOR ACTUATING A TRAILER BRAKE, A RELAY EMERGENCY VALVE AND A FLUID PRESSURE RESERVOIR CHARGEABLE WITH FLUID UNDER PRESSURE THROUGH AN EMERGENCY LINE WHEN THE LATTER IS CONNECTED WITH A TRACTOR AND OPERATIVE TO CHARGE THE BRAKE ACTUATOR WITH FLUID UNDER PRESURE WHEN THE EMERGENCY LINE DISCONNECTED FROM THE TRACTOR TO EFFECT AN EMERGENCY APPLICATION OF THE TRAILER BRAKE, COMPRISING SPRING-APPLIED BRAKE LOCKING MEANS FOR LOCKING SAID ACTUATOR IN BRAKE APPLIED POSITION WHEN THE PRESSURE IN SAID RESERVOIR DROPS TO A PREDETERMINED VALUE, FLUID PRESSURE OPERATED RELEASE MEANS FOR MAINTAINING SAID LOCKING MEANS IN RELEASED CONDITION WHEN THE PRESSURE IN SAID RESERVOIR IS ABOVE SAID PREDETERMINED VALUE, AND CONTROL VALVE MEANS MOVABLE TO A FIRST MORMAL POSITION CONNECTING SAID RESERVOIR AND SAID RELEASE MEANS TO MAINTAIN SAID LOCKING MEANS IN RELEASED CONDITION TO PREVENT THE LOCKING OF AN EMERGENCY APPLICATION OF THE TRAILER BRAKE WHEN THE TRAILER EMERGENCY LINE IS DISCONNECTED FROM THE TRACTOR, SUBSEQUENT DROP IN THE PRESSURE IN SAID RESERVOIR TO SAID PREDETERMINED VALUE ENABLING OPERATION OF SAID LOCKING MEANS TO LOCK THE BRAKE ACTUATOR IN BRAKE APPLIED POSITION.
Claim 2
Dependent Claim
197 words
A FLUID PRESSURE SAFETY BRAKE SYSTEM FOR A TRAILER OF THE TYPE HAVING A BRAKE ACTUATOR FOR ACTUATING A TRAILER BRAKE, A RELAY EMERGENCY VALVE AND A FLUID PRESSURE RESERVOIR CHARGEABLE WITH FLUID UNDER PRESSURE THROUGH AN EMERGENCY LINE WHEN THE LATTER IS CONNECTED WITH A TRACTOR AND OPERATIVE TO CHARGE THE BRAKE ACTUATOR WITH FLUID UNDER PRESURE WHEN THE EMERGENCY LINE DISCONNECTED FROM THE TRACTOR TO EFFECT AN EMERGENCY APPLICATION OF THE TRAILER BRAKE, COMPRISING SPRING-APPLIED BRAKE LOCKING MEANS FOR LOCKING SAID ACTUATOR IN BRAKE APPLIED POSITION WHEN THE PRESSURE IN SAID RESERVOIR DROPS TO A PREDETERMINED VALUE, FLUID PRESSURE OPERATED RELEASE MEANS FOR MAINTAINING SAID LOCKING MEANS IN RELEASED CONDITION WHEN THE PRESSURE IN SAID RESERVOIR IS ABOVE SAID PREDETERMINED VALUE, AND CONTROL VALVE MEANS MOVABLE TO A FIRST MORMAL POSITION CONNECTING SAID RESERVOIR AND SAID RELEASE MEANS TO MAINTAIN SAID LOCKING MEANS IN RELEASED CONDITION TO PREVENT THE LOCKING OF AN EMERGENCY APPLICATION OF THE TRAILER BRAKE WHEN THE TRAILER EMERGENCY LINE IS DISCONNECTED FROM THE TRACTOR, SUBSEQUENT DROP IN THE PRESSURE IN SAID RESERVOIR TO SAID PREDETERMINED VALUE ENABLING OPERATION OF SAID LOCKING MEANS TO LOCK THE BRAKE ACTUATOR IN BRAKE APPLIED POSITION.
References Cited (Backward Citations)
US3037819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |