US3235171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing strip for rotary pistons of internal combustion engines
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1964-06-08
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Granted: 1966-02-15
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Expires: 1984-06-08
Abstract
No abstract record available.
Inventors
- 👤 Frenzel Manfred
- 👤 Baumler Hermann
- 👤 Kiebel Herbert
- 👤 Lorcher Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10; F01C19/005; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A BAR-LIKE SEALING STRIP FOR THE ROTARY PISTON OF A ROTARY PISTON MACHINE, SAID PISTON INCLUDING AN AXIAL SLOT OPENING RADIALLY OUTWARDLY, SAID STRIP BEING DISPOSED IN SAID SLOT, SAID STRIP COMPRISING A MEMBER OF NON-METALLIC MATERIAL FORMING THE MAJOR PORTION OF THE LENGTH OF THE RADIALLY OUTER EDGE OF THE STRIP WHICH ENGAGES THE CIRCUMFERENTIAL WALL OF A CYLINDER IN WHICH THE PISTON IS MOUNTED, AND METALLIC CARRIER MEANS SUPPORTING ENGAGING SAID MEMBER AND INCLUDING END PORTIONS EXTENDING RADIALLY AT THE ENDS OF SAID NON-METALLIC MEMBER COVERING THE ENTIRE SAID ENDS AND ENGAGING AND PROTECTING THE SAID ENDS AND FORMING THE REGION OF SAID STRIP THAT ENGAGES THE END WALLS OF THE CYLINDER, SAID CARRIER INCLUDING METALLIC MEANS CONNECTED TO SAID END PORTIONS AND EXTENDING ALONG THE RADIALLY INNER EDGE OF SAID MEMBER FORM ONE SAID END PORTION TO THE OTHER THEREOF.
Claim 2
Dependent Claim
143 words
A BAR-LIKE SEALING STRIP FOR THE ROTARY PISTON OF A ROTARY PISTON MACHINE, SAID PISTON INCLUDING AN AXIAL SLOT OPENING RADIALLY OUTWARDLY, SAID STRIP BEING DISPOSED IN SAID SLOT, SAID STRIP COMPRISING A MEMBER OF NON-METALLIC MATERIAL FORMING THE MAJOR PORTION OF THE LENGTH OF THE RADIALLY OUTER EDGE OF THE STRIP WHICH ENGAGES THE CIRCUMFERENTIAL WALL OF A CYLINDER IN WHICH THE PISTON IS MOUNTED, AND METALLIC CARRIER MEANS SUPPORTING ENGAGING SAID MEMBER AND INCLUDING END PORTIONS EXTENDING RADIALLY AT THE ENDS OF SAID NON-METALLIC MEMBER COVERING THE ENTIRE SAID ENDS AND ENGAGING AND PROTECTING THE SAID ENDS AND FORMING THE REGION OF SAID STRIP THAT ENGAGES THE END WALLS OF THE CYLINDER, SAID CARRIER INCLUDING METALLIC MEANS CONNECTED TO SAID END PORTIONS AND EXTENDING ALONG THE RADIALLY INNER EDGE OF SAID MEMBER FORM ONE SAID END PORTION TO THE OTHER THEREOF.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |