US3208439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination engine-compressor
Assignee: Ingersoll Rand Co
•
Filing: 1964-02-14
•
Granted: 1965-09-28
•
Expires: 1984-02-14
Abstract
No abstract record available.
Inventors
- 👤 Otmar M Ulbing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/04; F02B71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A FREE PISTON ENGINE COMPRISING: (A) A CYLINDER; (B) A PISTON RECIPROCABLY MOUNTED IN SAID CYLINDER FOR MOVEMENT BETWEEN INNER AND OUTER POSITIONS AND HAVING A PISTON ROD EXTENDING FROM SAID CYLINDER; (C) RESILIENT MEANS BIASING SAID PISTON INWARD IN SAID CYLINDER; (D) LATCH MEANS OPERATIVE TO LOCK SAID PISTON IN ITS OUTER POSITION; (E) COCKING MEANS FOR FORCING SAID PISTON TO ITS OUTER POSITION AGAINST SAID BIASING MEANS AND MOVABLE TO A STORAGE POSITION WHEREIN IT DOES NOT INTERFERE WITH THE RECIPROCATION OF SAID PISTON; AND (F) TRIGGER MEANS OPERATIVE TO UNLATCH SAID LATCH MEANS IN RESPONSE TO THE APPROACH MOVEMENT OF SAID COCKING MEANS TO SAID STORAGE POSITION WHERIEN SAID PISTON IS RELEASED SAID BIASING MEANS MOVES IT TOWARD ITS INNER POSITION.
Claim 2
Dependent Claim
124 words
A FREE PISTON ENGINE COMPRISING: (A) A CYLINDER; (B) A PISTON RECIPROCABLY MOUNTED IN SAID CYLINDER FOR MOVEMENT BETWEEN INNER AND OUTER POSITIONS AND HAVING A PISTON ROD EXTENDING FROM SAID CYLINDER; (C) RESILIENT MEANS BIASING SAID PISTON INWARD IN SAID CYLINDER; (D) LATCH MEANS OPERATIVE TO LOCK SAID PISTON IN ITS OUTER POSITION; (E) COCKING MEANS FOR FORCING SAID PISTON TO ITS OUTER POSITION AGAINST SAID BIASING MEANS AND MOVABLE TO A STORAGE POSITION WHEREIN IT DOES NOT INTERFERE WITH THE RECIPROCATION OF SAID PISTON; AND (F) TRIGGER MEANS OPERATIVE TO UNLATCH SAID LATCH MEANS IN RESPONSE TO THE APPROACH MOVEMENT OF SAID COCKING MEANS TO SAID STORAGE POSITION WHERIEN SAID PISTON IS RELEASED SAID BIASING MEANS MOVES IT TOWARD ITS INNER POSITION.
References Cited (Backward Citations)
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |