Patent US3148919A successfully refreshed from Google Patents.
US3148919A
Expired / Lapsed
US
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Fluid pressure vehicle braking apparatus
Assignee: Siemens Mobility Ltd
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Filing: 1961-05-05
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Granted: 1964-09-15
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Simmons Arthur William
- 👤 Washbourn Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:57
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1812; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN COMBINATION, A DYNAMIC BRAKE, A FLUID PRESSURE BRAKING APPARATUS INCLUDING A SOURCE OF PRESSURE AND A BRAKE CYLINDER CONNECTED THEREWITH, A BRAKE CYLINDER PRESSURE LIMITING DEVICE INTERMEDIATE SAID BRAKE CYLINDER AND SAID SOURCE OF PRESSURE, FLUID PRESSURE SUPPLY MEANS VARIABLE IN RESPONSE TO VEHICLE LOAD CONNECTED THROUGH A CONTROL VALVE MEANS TO SAID PRESSURE LIMITING DEVICE, SAID CONTROL VALVE MEANS INCLUDING MEANS RESPONSIVE TO THE EFFECTIVENESS OF SAID DYNAMIC BRAKE FOR CLOSING SAID CONTROL VALVE UPON ACTUATION OF SAID DYNAMIC BRAKE TO THEREBY SEPARATE SAID FLUID PRESSURE SUPPLY FROM SAID PRESSURE LIMITING DEVICE, SAID PRESSURE LIMITING DEVICE INCLUDING MEANS FOR ESTABLISHING A PREDETERMINED FLUIE PRESSURE IN SAID BRAKE CYLINDER FROM SAID SOURCE OF PRESSURE UPON SEPARATION OF SAID PRESSURE LIMITING DEVICE FROM SAID FLUID PRESSURE SUPPLY AND FOR ESTABLISHING FLUID PRESSURE IN SAID BRAKE CYLINDER IN PROPORTION TO THE PRESSURE OF SAID FLUID PRESSURE SUPPLY UPON FLUID COMMUNICATION OF SAID PRESSURE LIMITING DEVICE WITH SAID FLUID PRESSURE SUPPLY UPON FAILURE OR WEAKENING OF SAID DYNAMIC BRAKE.
Claim 2
Dependent Claim
167 words
IN COMBINATION, A DYNAMIC BRAKE, A FLUID PRESSURE BRAKING APPARATUS INCLUDING A SOURCE OF PRESSURE AND A BRAKE CYLINDER CONNECTED THEREWITH, A BRAKE CYLINDER PRESSURE LIMITING DEVICE INTERMEDIATE SAID BRAKE CYLINDER AND SAID SOURCE OF PRESSURE, FLUID PRESSURE SUPPLY MEANS VARIABLE IN RESPONSE TO VEHICLE LOAD CONNECTED THROUGH A CONTROL VALVE MEANS TO SAID PRESSURE LIMITING DEVICE, SAID CONTROL VALVE MEANS INCLUDING MEANS RESPONSIVE TO THE EFFECTIVENESS OF SAID DYNAMIC BRAKE FOR CLOSING SAID CONTROL VALVE UPON ACTUATION OF SAID DYNAMIC BRAKE TO THEREBY SEPARATE SAID FLUID PRESSURE SUPPLY FROM SAID PRESSURE LIMITING DEVICE, SAID PRESSURE LIMITING DEVICE INCLUDING MEANS FOR ESTABLISHING A PREDETERMINED FLUIE PRESSURE IN SAID BRAKE CYLINDER FROM SAID SOURCE OF PRESSURE UPON SEPARATION OF SAID PRESSURE LIMITING DEVICE FROM SAID FLUID PRESSURE SUPPLY AND FOR ESTABLISHING FLUID PRESSURE IN SAID BRAKE CYLINDER IN PROPORTION TO THE PRESSURE OF SAID FLUID PRESSURE SUPPLY UPON FLUID COMMUNICATION OF SAID PRESSURE LIMITING DEVICE WITH SAID FLUID PRESSURE SUPPLY UPON FAILURE OR WEAKENING OF SAID DYNAMIC BRAKE.
References Cited (Backward Citations)
US1842497A
Cited
US1850609A
Cited
US2088185A
Cited
US2616641A
Cited
US2933350A
Cited
US2919161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |