Patent US3080026A successfully refreshed from Google Patents.
US3080026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch and brake control
Assignee: Allis Chalmers Corp
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Filing: 1961-07-11
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Granted: 1963-03-05
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Expires: 1981-07-11
Abstract
No abstract record available.
Inventors
- 👤 George P Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:02
CPC Classifications
B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
231 words
A CLUTCH AND BRAKE CONTROL FOR A VEHICLE HAVING LEFT AND RIGHT HYDRAULICALLY OPERATED STEERING CLUTCHES AND LEFT AND RIGHT HYDRAULIC BRAKES FOR TRACTION MEANS CARRIED AT LATERALLY OPPOSITE SIDES OF SAID VEHICLE; COMPRISING: A SOURCE OF PRESSURE FLUID, FIRST AND SECOND CLUTCH VALVES FOR SAID RIGHT AND LEFT CLUTCHES, RESPECTIVELY, FIRST AND SECOND BRAKE VALVES FOR SAID RIGHT AND LEFT BRAKES, RESPECTIVELY, FIRST AND SECOND MAIN PASSAGES CONNECTING, RESPECTIVELY, SAID FIRST AND SECOND CLUTCH VALVES IN FLUID COMMUNICATION WITH SAID SOURCE OF PRESSURE FLUID, CLUTCH SUPPLY PASSAGES CONNECTING SAID FIRST AND SECOND CLUTCH VALVES TO SAID RIGHT AND LEFT CLUTCHES, RESPECTIVELY, BRAKE SUPPLY PASSAGES CONNECTING SAID FIRST AND SECOND BRAKE VALVES TO SAID RIGHT AND LEFT BRAKES, RESPECTIVELY, A FIRST CROSS FLOW PASSAGE CONNECTING SAID FIRST CLUTCH VALVE TO SAID SECOND BRAKE VALVE, A SECOND CROSS FLOW PASSAGE CONNECTING SAID SECOND CLUTCH VALVE TO SAID FIRST BRAKE VALVE, A FIRST RELIEF VALVE PERMITTING FLUID FLOW FROM SAID FIRST MAIN PASSAGE TO SAID FIRST CROSS FLOW PASSAGE AT A FIRST PREDETERMINED PRESSURE OF FLUID IN SAID FIRST MAIN PASSAGE, A SECOND RELIEF VALVE PERMITTING FLUID FLOW FROM SAID SECOND MAIN PASSAGE TO SAID SECOND CROSS FLOW PASSAGE AT SAID FIRST PREDETERMINED PRESSURE OF FLUID IN SAID SECOND MAIN PASSAGE, AND A RELIEF VALVE CONNECTED TO EACH OF SAID CROSS FLOW PASSAGES PERMITTING FLUID THEREIN TO ESCAPE AT A SECOND PREDETERMINED PRESSURE.
Claim 2
Dependent Claim
231 words
A CLUTCH AND BRAKE CONTROL FOR A VEHICLE HAVING LEFT AND RIGHT HYDRAULICALLY OPERATED STEERING CLUTCHES AND LEFT AND RIGHT HYDRAULIC BRAKES FOR TRACTION MEANS CARRIED AT LATERALLY OPPOSITE SIDES OF SAID VEHICLE; COMPRISING: A SOURCE OF PRESSURE FLUID, FIRST AND SECOND CLUTCH VALVES FOR SAID RIGHT AND LEFT CLUTCHES, RESPECTIVELY, FIRST AND SECOND BRAKE VALVES FOR SAID RIGHT AND LEFT BRAKES, RESPECTIVELY, FIRST AND SECOND MAIN PASSAGES CONNECTING, RESPECTIVELY, SAID FIRST AND SECOND CLUTCH VALVES IN FLUID COMMUNICATION WITH SAID SOURCE OF PRESSURE FLUID, CLUTCH SUPPLY PASSAGES CONNECTING SAID FIRST AND SECOND CLUTCH VALVES TO SAID RIGHT AND LEFT CLUTCHES, RESPECTIVELY, BRAKE SUPPLY PASSAGES CONNECTING SAID FIRST AND SECOND BRAKE VALVES TO SAID RIGHT AND LEFT BRAKES, RESPECTIVELY, A FIRST CROSS FLOW PASSAGE CONNECTING SAID FIRST CLUTCH VALVE TO SAID SECOND BRAKE VALVE, A SECOND CROSS FLOW PASSAGE CONNECTING SAID SECOND CLUTCH VALVE TO SAID FIRST BRAKE VALVE, A FIRST RELIEF VALVE PERMITTING FLUID FLOW FROM SAID FIRST MAIN PASSAGE TO SAID FIRST CROSS FLOW PASSAGE AT A FIRST PREDETERMINED PRESSURE OF FLUID IN SAID FIRST MAIN PASSAGE, A SECOND RELIEF VALVE PERMITTING FLUID FLOW FROM SAID SECOND MAIN PASSAGE TO SAID SECOND CROSS FLOW PASSAGE AT SAID FIRST PREDETERMINED PRESSURE OF FLUID IN SAID SECOND MAIN PASSAGE, AND A RELIEF VALVE CONNECTED TO EACH OF SAID CROSS FLOW PASSAGES PERMITTING FLUID THEREIN TO ESCAPE AT A SECOND PREDETERMINED PRESSURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |