Patent JPS55120664A successfully refreshed from Google Patents.
Patent US3263913A successfully refreshed from Google Patents.
US3263913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1965-09-21
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Granted: 1966-08-02
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Expires: 1985-09-21
Abstract
No abstract record available.
Inventors
- 👤 Fuhrmann Ernst
- 👤 Frenzel Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:17
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A RADIAL SEAL FOR ROTARY PISTON INTERNAL COMBUSTION ENGINES WHICH IS POSITIONED IN A GROOVE FORMED IN THE PISTON, SAID RADIAL SEAL COMPRISING, IN COMBINATION: A PACKING STRIP; A PLURALITY OF RADIAL BORES PROVIDED WITHIN SAID STRIP, SAID BORES BEING OPEN ONLY AT THE SIDE OF SAID STRIP FACING THE GROOVE, SAID BORES BEING SPACED TO DEFINE SECTIONS OF SAID STRIP BETWEEN ADJACENT ONES THEREOF, AND SAID DEFINED SECTIONS BEING SMALLER IN SIZE AT THE END PORTIONS OF SAID STRIP THAN IN THE CENTER PORTION THEREOF.
Claim 2
Dependent Claim
86 words
A RADIAL SEAL FOR ROTARY PISTON INTERNAL COMBUSTION ENGINES WHICH IS POSITIONED IN A GROOVE FORMED IN THE PISTON, SAID RADIAL SEAL COMPRISING, IN COMBINATION: A PACKING STRIP; A PLURALITY OF RADIAL BORES PROVIDED WITHIN SAID STRIP, SAID BORES BEING OPEN ONLY AT THE SIDE OF SAID STRIP FACING THE GROOVE, SAID BORES BEING SPACED TO DEFINE SECTIONS OF SAID STRIP BETWEEN ADJACENT ONES THEREOF, AND SAID DEFINED SECTIONS BEING SMALLER IN SIZE AT THE END PORTIONS OF SAID STRIP THAN IN THE CENTER PORTION THEREOF.
References Cited (Backward Citations)
FR409669A
Cited
US1114046A
Cited
US1805063A
Cited
US2070662A
Cited
US2305317A
Cited
US2423639A
Cited
US2902980A
Cited
US3185387A
Cited
US3180564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |