US3213765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure motor
Assignee: Parker Hannifin Corp
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Filing: 1963-09-20
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Granted: 1965-10-26
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Expires: 1983-09-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Knable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:11
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A FLUID PRESSURE ACTUATOR THE COMBINATION OF A LARGE CYLINDER HAVING A HEAD AT EACH END THEREOF, A SMALL CYLINDER HAVING AN INNER AND TELESCOPED IN THE LARGE CYLINDER THROUGH ONE HEAD THEREOF, A LARGE PISTON SECURED ON THE TELESCOPED END OF THE SMALL CYLINDER FOR MOVEMENT IN UNISON THEREWITH AND SLIDABLE IN THE LARGE CYLINDER BETWEEN THE HEADS TEHREON, SAID SMALL CYLINDER ALSO HAVING A HEAD ON ITS OUTER END, A SMALL PISTON SLIDABLE IN THE SMALL CYLINDER, BETWEEN THE HEAD ON THE SMALL CYLINDER AND AN ABUTMENT MOVABLE WITH THE LARGE PISTON, AN ACTUATOR ROD ATTACHED TO AND MOVEABLE WITH THE SMALL PISTON AND PROJECTING THROUGH THE OTHER HEAD ON THE LARGE CYLINDER, AND MEANS THROUGH WHICH PRESSURE FLUID MAY BE DIRECTED INTO AND FROM THE CYLINDERS TO BRING ABOUT RECIPROCATION OF THE PISTONS INDIVIDUALLY AND IN UNISON IN SAID CYLINDERS.
Claim 2
Dependent Claim
144 words
IN A FLUID PRESSURE ACTUATOR THE COMBINATION OF A LARGE CYLINDER HAVING A HEAD AT EACH END THEREOF, A SMALL CYLINDER HAVING AN INNER AND TELESCOPED IN THE LARGE CYLINDER THROUGH ONE HEAD THEREOF, A LARGE PISTON SECURED ON THE TELESCOPED END OF THE SMALL CYLINDER FOR MOVEMENT IN UNISON THEREWITH AND SLIDABLE IN THE LARGE CYLINDER BETWEEN THE HEADS TEHREON, SAID SMALL CYLINDER ALSO HAVING A HEAD ON ITS OUTER END, A SMALL PISTON SLIDABLE IN THE SMALL CYLINDER, BETWEEN THE HEAD ON THE SMALL CYLINDER AND AN ABUTMENT MOVABLE WITH THE LARGE PISTON, AN ACTUATOR ROD ATTACHED TO AND MOVEABLE WITH THE SMALL PISTON AND PROJECTING THROUGH THE OTHER HEAD ON THE LARGE CYLINDER, AND MEANS THROUGH WHICH PRESSURE FLUID MAY BE DIRECTED INTO AND FROM THE CYLINDERS TO BRING ABOUT RECIPROCATION OF THE PISTONS INDIVIDUALLY AND IN UNISON IN SAID CYLINDERS.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |