Patent US3260247A successfully refreshed from Google Patents.
US3260247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston engine
Assignee: Daimler Benz AG
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Filing: 1961-06-08
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Granted: 1966-07-12
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Expires: 1981-06-08
Abstract
No abstract record available.
Inventors
- 👤 Gassmann Johannes
- 👤 Braun Eberhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:42
CPC Classifications
F; 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
126 words
IN A ROTARY PISTON-INTERNAL COMBUSTION ENGINE OF TROCHOIDAL CONSTRUCTION INCLUDING A HOUSING PROVIDED WITH EPITROCHOIDALLY SHAPED INTERNAL SURFACES DEFINING A CHAMBER AND HAVING INLET AND OUTLET MEANS, A POLYGONAL PISTON CARRYING OUT A ROTARY MOVEMENT WITHIN SAID CHAMBER ABOUT AN ECCENTRIC ARRANGED ON THE ENGINE SHAFT SUBSTANTIALLY AS INTERNAL ENVELOPE OF THE EPITROCHOID OF SAID INTERNAL SURFACES, THE IMPROVEMENT ESSENTIALLY CONSISTING OF MEANS FOR IMPARTING SAID ROTARY MOVEMENT TO SAID PISTON INCLUDING AT LEAST APPROXIMATELY TROCHOIDALLYSHAPED CAM MEANS SEPARATE FROM SAID EPITROCHOIDALLY SHAPED INTERNAL SURFACES AND CAM FOLLOWER MEANS COOPERATING WITH SAID CAM MEANS, SAID CAM MEANS BEING ARRANGED AT ONE OF THE TWO PARTS CONSISTING OF SAID HOUSING AND SAID PISTON, AND SAID CAM FOLLOWER MEANS BEING ARRANGED AT THE OTHER OF SAID TWO PARTS.
Claim 2
Dependent Claim
126 words
IN A ROTARY PISTON-INTERNAL COMBUSTION ENGINE OF TROCHOIDAL CONSTRUCTION INCLUDING A HOUSING PROVIDED WITH EPITROCHOIDALLY SHAPED INTERNAL SURFACES DEFINING A CHAMBER AND HAVING INLET AND OUTLET MEANS, A POLYGONAL PISTON CARRYING OUT A ROTARY MOVEMENT WITHIN SAID CHAMBER ABOUT AN ECCENTRIC ARRANGED ON THE ENGINE SHAFT SUBSTANTIALLY AS INTERNAL ENVELOPE OF THE EPITROCHOID OF SAID INTERNAL SURFACES, THE IMPROVEMENT ESSENTIALLY CONSISTING OF MEANS FOR IMPARTING SAID ROTARY MOVEMENT TO SAID PISTON INCLUDING AT LEAST APPROXIMATELY TROCHOIDALLYSHAPED CAM MEANS SEPARATE FROM SAID EPITROCHOIDALLY SHAPED INTERNAL SURFACES AND CAM FOLLOWER MEANS COOPERATING WITH SAID CAM MEANS, SAID CAM MEANS BEING ARRANGED AT ONE OF THE TWO PARTS CONSISTING OF SAID HOUSING AND SAID PISTON, AND SAID CAM FOLLOWER MEANS BEING ARRANGED AT THE OTHER OF SAID TWO PARTS.
References Cited (Backward Citations)
US2988065A
Cited
US3096746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |