US3119230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free piston engine system
Assignee: Individual
•
Filing: 1961-05-10
•
Granted: 1964-01-28
•
Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kosoff Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:17
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/02; F02B71/04; F02B71/045; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN COMBINATION: A FREE PISTON ENGINE WHICH INCLUDES MEANS FOR DEVELOPING PRESSURE IN A LIQUID AND ALSO INCLUDES A NUMBER OF REBOUNCE CHAMBERS CORRESPONDING TO THE NUMBER OF PISTONS THEREIN, A FLUID MOTOR, MEANS INCLUDING HYDRAULIC MEANS FOR COUPLING SAID PRESSURE-DEVELOPING MEANS TO THE INPUT OF SAID MOTOR SAID REBOUNCE CHAMBERS BEING CONSTRUCTED TO BE FREE FROM ANY LIQUID AND TO SUPPLY THE PREDOMINANT RESTORATIVE REBOUNCE FORCE FOR THE PISTON OF SAID ENGINE, WHEREUPON SAID FLUID MOTOR IS DRIVEN IN RESPONSE TO THE OPERATION OF SAID ENGINE, AND
Claim 2
Dependent Claim
88 words
IN COMBINATION: A FREE PISTON ENGINE WHICH INCLUDES MEANS FOR DEVELOPING PRESSURE IN A LIQUID AND ALSO INCLUDES A NUMBER OF REBOUNCE CHAMBERS CORRESPONDING TO THE NUMBER OF PISTONS THEREIN, A FLUID MOTOR, MEANS INCLUDING HYDRAULIC MEANS FOR COUPLING SAID PRESSURE-DEVELOPING MEANS TO THE INPUT OF SAID MOTOR SAID REBOUNCE CHAMBERS BEING CONSTRUCTED TO BE FREE FROM ANY LIQUID AND TO SUPPLY THE PREDOMINANT RESTORATIVE REBOUNCE FORCE FOR THE PISTON OF SAID ENGINE, WHEREUPON SAID FLUID MOTOR IS DRIVEN IN RESPONSE TO THE OPERATION OF SAID ENGINE, AND
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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) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |