Patent US3217941A successfully refreshed from Google Patents.
US3217941A
Expired / Lapsed
US
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Hydraulic power units
Assignee: Individual
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Filing: 1962-11-07
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Granted: 1965-11-16
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 Francis B Fishburne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:59
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F04B23/00; F04B23/02; F04B23/021; F15; F15B; F15B1/00; F15B1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A HYDRAULIC POWER UNIT COMPRISING A PUMP AND A GENERALLY RECTANGULAR ELONGATED TANK HAVING SIDE AND END WALLS, A SLOPING BOTTOM EXTENDING BETWEEN SAID WALLS, AND A BAFFLE EXTENDING UPWARD FROM SAID SLOPING BOTTOM AND DIVIDING THE TANK LONGITUDINALLY INTO TWO COMMUNICATING COMPARTMENTS, AN OPERATING VALUE FOR CONTROLLING THE FLOW OF MOTIVE FLUID FROM SAID PUMP TO BOTH ENDS OF ANY DESIRED HYDRAULIC CYLINDER, AN INTAKE PIPE FOR SAID PUMP HAVING A STRAINER AT ITS END LOCATED IN ONE COMPARTMENT, AND A COMMON RETURN PIPE FROM SAID VALVE DELIVERING INTO THE OTHER COMPARTMENT.
Claim 2
Dependent Claim
93 words
A HYDRAULIC POWER UNIT COMPRISING A PUMP AND A GENERALLY RECTANGULAR ELONGATED TANK HAVING SIDE AND END WALLS, A SLOPING BOTTOM EXTENDING BETWEEN SAID WALLS, AND A BAFFLE EXTENDING UPWARD FROM SAID SLOPING BOTTOM AND DIVIDING THE TANK LONGITUDINALLY INTO TWO COMMUNICATING COMPARTMENTS, AN OPERATING VALUE FOR CONTROLLING THE FLOW OF MOTIVE FLUID FROM SAID PUMP TO BOTH ENDS OF ANY DESIRED HYDRAULIC CYLINDER, AN INTAKE PIPE FOR SAID PUMP HAVING A STRAINER AT ITS END LOCATED IN ONE COMPARTMENT, AND A COMMON RETURN PIPE FROM SAID VALVE DELIVERING INTO THE OTHER COMPARTMENT.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |