Patent US3268157A successfully refreshed from Google Patents.
US3268157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial packing for rotary piston machines, especially internal combustion engines
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1964-05-04
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Granted: 1966-08-23
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Frenzel Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:35
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
SEALING STRIP MEANS FOR SEALING BETWEEN A ROTARY PISTON, HAVING AT LEAST ONE AXIAL SLOT TO RECEIVE THE STRIP MEANS, AND A CYLINDER IN WHICH THE PISTON ROTATES COMPRISING; AT LEAST TWO STRIP MEMBERS IN FACE-TO-FACE RELATION SLIDABLY MOUNTED IN THE SLOT IN THE PISTON, ONE OF SAID STRIP MEMBERS BEING A UNITARY MEMBER EXTENDING SUBSTANTIALLY THE FULL LENGTH OF THE SLOT AND HAVING A CONTINUOUS OUTER EDGE FOR SLIDING SEALING ENGAGEMENT WITH THE AXIAL INNER WALL OF THE CYLINDER, AND AT LEAST ONE OTHER OF SAID STRIPS COMPRISING A MULTIPLE PART MEMBER HAVING AT LEAST OPPOSITE END PORTIONS WITH RADIAL END SURFACES FOR SLIDING SEALING ENGAGEMENT WITH THE END WALLS OF THE CYLINDER AT THE ENDS OF THE PISTON.
Claim 2
Dependent Claim
120 words
SEALING STRIP MEANS FOR SEALING BETWEEN A ROTARY PISTON, HAVING AT LEAST ONE AXIAL SLOT TO RECEIVE THE STRIP MEANS, AND A CYLINDER IN WHICH THE PISTON ROTATES COMPRISING; AT LEAST TWO STRIP MEMBERS IN FACE-TO-FACE RELATION SLIDABLY MOUNTED IN THE SLOT IN THE PISTON, ONE OF SAID STRIP MEMBERS BEING A UNITARY MEMBER EXTENDING SUBSTANTIALLY THE FULL LENGTH OF THE SLOT AND HAVING A CONTINUOUS OUTER EDGE FOR SLIDING SEALING ENGAGEMENT WITH THE AXIAL INNER WALL OF THE CYLINDER, AND AT LEAST ONE OTHER OF SAID STRIPS COMPRISING A MULTIPLE PART MEMBER HAVING AT LEAST OPPOSITE END PORTIONS WITH RADIAL END SURFACES FOR SLIDING SEALING ENGAGEMENT WITH THE END WALLS OF THE CYLINDER AT THE ENDS OF THE PISTON.
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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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |