US3249094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating sealing means for rotary combustion engines
Assignee: Wankel GmbH
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Filing: 1963-10-10
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Granted: 1966-05-03
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Expires: 1983-10-10
Abstract
No abstract record available.
Inventors
- 👤 Hoppner Ernst
- 👤 Lechler Rolf
- 👤 Hoffmann Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:11
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10; F02; F02B; F02B53/00; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN AN INTERNAL COMBUSTION ENGINE OF THE ROTARY PISTON TYPE HAVING A HOUSING, A PISTON MOUNTED FOR ECCENTRIC ROTATION WITHIN SAID HOUSING SUCCESSIVELY TO FORM WITH SAID HOUSING WALLS VARIABLE-VOLUME OPERATING CHAMBERS, A ROTATABLE POWER OUTPUT SHAFT MOUNTED IN SAID HOUSING, AND TRANSMISSION DRIVE MEANS BETWEEN SAID PISTON AND SHAFT PROVIDED WITH CONTINUOUS LUBRICATION, IMPROVED MEANS FOR PREVENTING PASSAGE OF THE TRANSMISSION LUBRICANT INTO THE AFORESAID OPERATING CHAMBERS COMPRISING MEANS SECURED TO SAID SHAFT FOR ROTATION THEREWITH, AND SEALING STRUCTURE CONCENTRIC OF THE AXIS OF ROTATION OF THE PISTON INTERPOSED BETWEEN SAID SHAFT-SECURED MEANS AND A SIDE WALL OF THE PISTON AND MOUNTED IN ONE OF THEM
Claim 2
Dependent Claim
107 words
IN AN INTERNAL COMBUSTION ENGINE OF THE ROTARY PISTON TYPE HAVING A HOUSING, A PISTON MOUNTED FOR ECCENTRIC ROTATION WITHIN SAID HOUSING SUCCESSIVELY TO FORM WITH SAID HOUSING WALLS VARIABLE-VOLUME OPERATING CHAMBERS, A ROTATABLE POWER OUTPUT SHAFT MOUNTED IN SAID HOUSING, AND TRANSMISSION DRIVE MEANS BETWEEN SAID PISTON AND SHAFT PROVIDED WITH CONTINUOUS LUBRICATION, IMPROVED MEANS FOR PREVENTING PASSAGE OF THE TRANSMISSION LUBRICANT INTO THE AFORESAID OPERATING CHAMBERS COMPRISING MEANS SECURED TO SAID SHAFT FOR ROTATION THEREWITH, AND SEALING STRUCTURE CONCENTRIC OF THE AXIS OF ROTATION OF THE PISTON INTERPOSED BETWEEN SAID SHAFT-SECURED MEANS AND A SIDE WALL OF THE PISTON AND MOUNTED IN ONE OF THEM
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |