Patent US4816696A successfully refreshed from Google Patents.
Patent US3131538A successfully refreshed from Google Patents.
US3131538A
Expired / Lapsed
US
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Hydraulic power system for brakes
Assignee: Motors Liquidation Co
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Filing: 1962-04-30
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Granted: 1964-05-05
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Schultz
- 👤 Claude A Thorsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:07
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; B60T13/168; B60T13/161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A HYDRAULIC FLUID POWER SYSTEM FOR OPERATING VEHICLE BRAKES, THE COMBINATION OF, A SOURCE OF PRESSURIZED HYDRAULIC FLUID, A HYDRAULIC FLUID ACCUMULATOR, A HYDRAULIC FLUID VEHICLE BRAKE SYSTEM INCLUDING A MASTER CYLINDER, A HYDRAULIC FLUID MOTOR FOR ASSISTING AND PRESSURIZING FLUID IN SAID MASTER CYLINDER, MANUALLY OPERATED CONTROL VALVE MEANS CONTROLLING PRESSURIZATION OF HYDRAULIC FLUID IN SAID MOTOR AND IN SAID ACCUMULATOR, SAID CONTROL VALVE MEANS HAVING ONE POSITIONING OF THE VALVE MECHANISM PROVIDING FOR FREE FLOW OF HYDRAULIC FLUID THROUGH SAID MOTOR FROM SAID SOURCE AND A SECOND POSITIONING OF THE VALVE MECHANISM RESTRICTING HYDRAULIC FLUID FLOW THROUGH SAID MOTOR TO INDUCE THEREBY HYDRAULIC FLUID PRESSURE BUILD-UP IN SAID MOTOR WHILE CONCURRENTLY DIRECTING SAID INDUCED FLUID PRESSURE TO SAID ACCUMULATOR.
Claim 2
Dependent Claim
122 words
IN A HYDRAULIC FLUID POWER SYSTEM FOR OPERATING VEHICLE BRAKES, THE COMBINATION OF, A SOURCE OF PRESSURIZED HYDRAULIC FLUID, A HYDRAULIC FLUID ACCUMULATOR, A HYDRAULIC FLUID VEHICLE BRAKE SYSTEM INCLUDING A MASTER CYLINDER, A HYDRAULIC FLUID MOTOR FOR ASSISTING AND PRESSURIZING FLUID IN SAID MASTER CYLINDER, MANUALLY OPERATED CONTROL VALVE MEANS CONTROLLING PRESSURIZATION OF HYDRAULIC FLUID IN SAID MOTOR AND IN SAID ACCUMULATOR, SAID CONTROL VALVE MEANS HAVING ONE POSITIONING OF THE VALVE MECHANISM PROVIDING FOR FREE FLOW OF HYDRAULIC FLUID THROUGH SAID MOTOR FROM SAID SOURCE AND A SECOND POSITIONING OF THE VALVE MECHANISM RESTRICTING HYDRAULIC FLUID FLOW THROUGH SAID MOTOR TO INDUCE THEREBY HYDRAULIC FLUID PRESSURE BUILD-UP IN SAID MOTOR WHILE CONCURRENTLY DIRECTING SAID INDUCED FLUID PRESSURE TO SAID ACCUMULATOR.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |