Patent US3118595A successfully refreshed from Google Patents.
US3118595A
Expired / Lapsed
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Sealing rotary piston engine
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1961-12-11
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Granted: 1964-01-21
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Fuhrmann Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:50
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A DEVICE FOR SEALING THE PISTON OF A ROTARY PISTON ENGINE, COMPRISING AT LEAST ONE SEALING BAR PROVIDED IN A RADIAL GROOVE FORMED IN THE PISTON, AND SPRING MEANS OPERATIVELY DISPOSED BETWEEN SAID PISTON AND SEALING BAR FOR EXERTING ON THE LATTER RESPECTIVELY A RADIALLY EFFECTIVE FORCE OPERATIVE TO HOLD THE FREE END OF SUCH SEALING BAR IN SEALING ENGAGEMENT WITH THE WALL OF THE CYLINDER AND A TANGENTIALLY EFFECTIVE FORCE WHICH IS EFFECTIVE TO PRESS SAID SEALING BAR AGAINST THE FLANKS OF SAID RADIAL GROOVE, SAID SPRING MEANS BEING CONSTRUCTED TO HAVE A LIMITED SPRING MOVEMENT WITH RESPECT TO THE RADIALLY EFFECTIVE FORCE THEREOF WHEREBY SUCH FORCE IS CANCELLED BY THE ACTION OF CENTRIFUGAL FORCE ACTING ON THE SEALING BAR.
Claim 2
Independent Claim
121 words
A DEVICE FOR SEALING THE PISTON OF A ROTARY PISTON ENGINE, COMPRISING AT LEAST ONE SEALING BAR PROVIDED IN A RADIAL GROOVE FORMED IN THE PISTON, AND SPRING MEANS OPERATIVELY DISPOSED BETWEEN SAID PISTON AND SEALING BAR FOR EXERTING ON THE LATTER RESPECTIVELY A RADIALLY EFFECTIVE FORCE OPERATIVE TO HOLD THE FREE END OF SUCH SEALING BAR IN SEALING ENGAGEMENT WITH THE WALL OF THE CYLINDER AND A TANGENTIALLY EFFECTIVE FORCE WHICH IS EFFECTIVE TO PRESS SAID SEALING BAR AGAINST THE FLANKS OF SAID RADIAL GROOVE, SAID SPRING MEANS BEING CONSTRUCTED TO HAVE A LIMITED SPRING MOVEMENT WITH RESPECT TO THE RADIALLY EFFECTIVE FORCE THEREOF WHEREBY SUCH FORCE IS CANCELLED BY THE ACTION OF CENTRIFUGAL FORCE ACTING ON THE SEALING BAR.
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) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |