Patent US3101808A successfully refreshed from Google Patents.
US3101808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission
Assignee: Vickers Inc
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Filing: 1959-03-23
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Granted: 1963-08-27
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Richard O Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/09; B62D5/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A HYDRAULIC POWER TRANSMISSION COMPRISING: A POWER CIRCUIT INCLUDING A RESERVOIR, A HYDRAULIC POWER SOURCE, A FLUID MOTOR AND A CONTROL VALVE FOR REGULATING FLOW FROM SAID POWER SOURCE TO SAID FLUID MIOTOR; A CONTROL CIRCUIT INCLUDING A PUMP FOR SUPPLYING CONTROL FLUID TO MOVE SAID CONTROL VALVE THEREBY DIRECTING FLUID FLOW FROM THE POWER SOURCE TO THE FLUID MOTOR; A RETURN LINE IN SAID POWER CIRCUIT FOR CONDUCTING DISPLACEMENT FROM SAID MOTOR TO SAID RESERVOIR; MEANS FORMING A HYDRAULIC CONNECTION BETWEEN SAID RETURN LINE AND SAID CONTROL CIRCUIT; AND MEANS IN SAID RETURN LINE FOR MAINTAINING A PRESSURE HEAD ON SAID CONTROL CIRCUIT THROUGH SAID HYDRAULIC CONNECTION FOR REPLENISHING THE CONTROL CIRCUIT FROM THE RETURN LINE.
Claim 2
Dependent Claim
117 words
A HYDRAULIC POWER TRANSMISSION COMPRISING: A POWER CIRCUIT INCLUDING A RESERVOIR, A HYDRAULIC POWER SOURCE, A FLUID MOTOR AND A CONTROL VALVE FOR REGULATING FLOW FROM SAID POWER SOURCE TO SAID FLUID MIOTOR; A CONTROL CIRCUIT INCLUDING A PUMP FOR SUPPLYING CONTROL FLUID TO MOVE SAID CONTROL VALVE THEREBY DIRECTING FLUID FLOW FROM THE POWER SOURCE TO THE FLUID MOTOR; A RETURN LINE IN SAID POWER CIRCUIT FOR CONDUCTING DISPLACEMENT FROM SAID MOTOR TO SAID RESERVOIR; MEANS FORMING A HYDRAULIC CONNECTION BETWEEN SAID RETURN LINE AND SAID CONTROL CIRCUIT; AND MEANS IN SAID RETURN LINE FOR MAINTAINING A PRESSURE HEAD ON SAID CONTROL CIRCUIT THROUGH SAID HYDRAULIC CONNECTION FOR REPLENISHING THE CONTROL CIRCUIT FROM THE RETURN LINE.
References Cited (Backward Citations)
US2022698A
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US2020951A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |