US3194489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial piston for rotary engines
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1964-03-20
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Granted: 1965-07-13
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Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frenzel Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:16
CPC Classifications
F; F01; F01C; F01C19/00; F01C19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A SEALING STRUCTURE FOR ROTATY COMBUSTION ENGINES, A HOUSING, A ROTARY PISTON IN SAID HOUSING, SAID PISTON HAVING GROOVES AT THE CORNERS THEREOF, SEALING MEANS CARRIED BY SAID PISTON AND COOPERATING WITH SAID HOUSING, SAID SEALING MEANS COMPRISING AN INSERT MEMBER OF GENERALLY INVERTED T-SHAPE IN CROSS SECTION INSERTED IN SAID GROOVE IN SAID PISTON WITH THE HEAD OF THE T AT THE RADIAL INNER END OF THE GROOVE AND COOPERABLE WITH THE WALLS THEREOF TO DEFINE TWO GROOVES, AND SEALING STRIPS SLIDABLY RECEIVED IN SAID LAST-NAMED GROOVES.
Claim 2
Dependent Claim
89 words
IN A SEALING STRUCTURE FOR ROTATY COMBUSTION ENGINES, A HOUSING, A ROTARY PISTON IN SAID HOUSING, SAID PISTON HAVING GROOVES AT THE CORNERS THEREOF, SEALING MEANS CARRIED BY SAID PISTON AND COOPERATING WITH SAID HOUSING, SAID SEALING MEANS COMPRISING AN INSERT MEMBER OF GENERALLY INVERTED T-SHAPE IN CROSS SECTION INSERTED IN SAID GROOVE IN SAID PISTON WITH THE HEAD OF THE T AT THE RADIAL INNER END OF THE GROOVE AND COOPERABLE WITH THE WALLS THEREOF TO DEFINE TWO GROOVES, AND SEALING STRIPS SLIDABLY RECEIVED IN SAID LAST-NAMED GROOVES.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |