US3150488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power devices
Assignee: Individual
•
Filing: 1961-11-22
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Granted: 1964-09-29
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Expires: 1981-11-22
Abstract
No abstract record available.
Inventors
- 👤 Emmett L Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:58
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25D; B25D9/00; B25D9/06; B25D9/12; Y; Y10; Y10S; Y10S173/00; Y10S173/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
A POWER DEVICE INCLUDING: A BODY HAVING A BORE; A DRIVE PISTON RECIPROCABLY MOVABLE IN SAID BORE, SAID PISTON HAVING ONE END PORTION EXTENDABLE OUTWARDLY OF SAID BORE, SAID BODY HAVING MEANS PROVIDING A CYLINDER, SAID DRIVE PISTON HAVING AN END PORTION OPPOSITE SAID ONE END PORTION EXTENDING INTO SAID CYLINDER; AN ACCUMULATOR PISTON RECIPROCABLY MOVABLE IN SAID CYLINDER; MEANS BIASING SAID ACCUMULATOR PISTON TOWARD SAID DRIVE PISTON AND INTO ENGAGEMENT THEREWITH; MEANS FOR INTRODUCING A NONCOMPRESSIBLE POWER FLUID INTO SAID CYLINDER FOR MOVING SAID DRIVE PISTON AND SAID ACCUMULATOR PISTON TOWARD RETRACTED POSITIONS AGAINST THE FORCE EXERTED BY SAID BIASING MEANS, SAID ACCUMULATOR PISTON THE FORCE OF THE PRESSURE OF SAID POWER FLUID WHEN SAID ACCUMULATOR PISTON IS IN ENGAGEMENT THEREWITH, SAID DRIVE PISTON HAVING A SMALLER TOTAL AREA THEREOF EXPOSED TO SAID POWER FLUID THAN SAID ACCUMULATOR PISTON.
References Cited (Backward Citations)
US2919678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |