US3281064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal construction
Assignee: Daimler Benz AG
•
Filing: 1964-12-18
•
Granted: 1966-10-25
•
Expires: 1984-12-18
Abstract
No abstract record available.
Inventors
- 👤 Springer Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:14
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A SEALING BAR STRUCTURE FOR ROTARY PISTON INTERNAL COMBUSTION ENGINES, ESPECIALLY THOSE OF TROCHOIDAL CONSTRUCTION HAVING A POLYGONAL PISTON PROVIDED AT EACH CORNER WITH A RADIAL SEAL DISPOSED IN A GROOVE EXTENDING SUBSTANTIALLY PARALLELY TO THE ENGINE AXIS, COMPRISING SEALING BAR MEANS FORMING EACH AID RADIAL SEAL AND ESSENTIALLY CONSISTING OF A CERAMIC MATERIAL OF HIGH MECHANICAL RIGIDITY AND HIGH RESISTANCE TO TEMPERATURE CHANGE.
Claim 2
Dependent Claim
64 words
A SEALING BAR STRUCTURE FOR ROTARY PISTON INTERNAL COMBUSTION ENGINES, ESPECIALLY THOSE OF TROCHOIDAL CONSTRUCTION HAVING A POLYGONAL PISTON PROVIDED AT EACH CORNER WITH A RADIAL SEAL DISPOSED IN A GROOVE EXTENDING SUBSTANTIALLY PARALLELY TO THE ENGINE AXIS, COMPRISING SEALING BAR MEANS FORMING EACH AID RADIAL SEAL AND ESSENTIALLY CONSISTING OF A CERAMIC MATERIAL OF HIGH MECHANICAL RIGIDITY AND HIGH RESISTANCE TO TEMPERATURE CHANGE.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |