US3356037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating pistons for pumps and motors
Assignee: Boulton Paul Aircraft Ltd
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Filing: 1965-10-11
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Granted: 1967-12-05
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Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 John D North
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F01B3/0032; F01B3/0035; F01B3/0044; F01B3/007; F04; F04B; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/20; F04B1/2014; F04B1/2042; F04B1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A HYDRAULIC PUMP OR MOTOR INCLUDING AT LEAST ONE PISTON RECIPROCABLE TO DISPLACE LIQUID, A CUP FORMED ON ONE END OF THE PISTON, A SPHERE LARGER IN DIAMETER THAN THE DISPLACEMENT DIAMETER OF THE PISTON, ENGAGED WITHIN THE CUP OVER AN EQUATORIAL PLANE FOR ROTATION IN THE CUP, A CAM TRACK WITH WHICH THE SPHERE IS ADAPTED TO ENGAGE SAID PISTON BEING HOLLOW AND THERE BEING AN OPENING WITHIN THE CUP CONNECTED TO RECEIVE LIQUID AT PRESSURE FROM THE DISPLACEMENT AREA OF THE PISTON, THE TOTAL EFFECTIVE AREA OF SAID OPENING, WHEN PROJECTED INTO A PLANE AT RIGHT ANGLES TO THE AXIS OF THE PISTON, BEING GREATER THAN THE DISPLACEMENT AREA OF THE PISTON, AND BEARING
Claim 2
Dependent Claim
116 words
A HYDRAULIC PUMP OR MOTOR INCLUDING AT LEAST ONE PISTON RECIPROCABLE TO DISPLACE LIQUID, A CUP FORMED ON ONE END OF THE PISTON, A SPHERE LARGER IN DIAMETER THAN THE DISPLACEMENT DIAMETER OF THE PISTON, ENGAGED WITHIN THE CUP OVER AN EQUATORIAL PLANE FOR ROTATION IN THE CUP, A CAM TRACK WITH WHICH THE SPHERE IS ADAPTED TO ENGAGE SAID PISTON BEING HOLLOW AND THERE BEING AN OPENING WITHIN THE CUP CONNECTED TO RECEIVE LIQUID AT PRESSURE FROM THE DISPLACEMENT AREA OF THE PISTON, THE TOTAL EFFECTIVE AREA OF SAID OPENING, WHEN PROJECTED INTO A PLANE AT RIGHT ANGLES TO THE AXIS OF THE PISTON, BEING GREATER THAN THE DISPLACEMENT AREA OF THE PISTON, AND BEARING
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |