US3890071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary steam engine
Assignee: Brien William J O
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Filing: 1973-09-24
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Granted: 1975-06-17
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Expires: 1993-09-24
Abstract
Abstract A rotaty steam engine having a cylindrical housing with an eccentrically mounted cylindrical rotor therein. The rotor is provided with reciprocal vanes that are controlled by a fixed cam surface, and the inner surface of the housing has a flat chordal plate extending thereacross through which inlet and outlet passages are provided. The arrangement is such that the chambers between the inner rotor and the housing approximate an involute in order to take full advantage of isentropic expansion.
Inventors
- 👤 William J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:22
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/30; F01C1/34; F01C1/344; F01C1/3441; F04; F04C; F04C2250/00; F04C2250/30; F04C2250/301
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A rotary steam engine comprising a substantially circular housing, an intake passage and an exhaust passage through said housing, a header plate mounted in said housing with an inner surface extending substantially on a chord of the circular housing, spaced intake and exhaust passages at opposite ends of the header plate, a cylindrical rotor eccentrically mounted in said housing to have a point of tangency at a point removed from the center of said header plate and closer to the intake passage than the exhaust passage, a shaft passing through the axis of said cylindrical rotor, the axis of said rotor located below a plane passing through the horizontal axis of said housing, a plurality of vanes reciprocally mounted in said rotor, stationary cam means located within the housing engaging the radially inner end of said vanes, said vanes contacting the housing or the header plate throughout.
Claim 2
Dependent Claim
147 words
A rotary steam engine comprising a substantially circular housing, an intake passage and an exhaust passage through said housing, a header plate mounted in said housing with an inner surface extending substantially on a chord of the circular housing, spaced intake and exhaust passages at opposite ends of the header plate, a cylindrical rotor eccentrically mounted in said housing to have a point of tangency at a point removed from the center of said header plate and closer to the intake passage than the exhaust passage, a shaft passing through the axis of said cylindrical rotor, the axis of said rotor located below a plane passing through the horizontal axis of said housing, a plurality of vanes reciprocally mounted in said rotor, stationary cam means located within the housing engaging the radially inner end of said vanes, said vanes contacting the housing or the header plate throughout.
Claim 3
Dependent Claim
22 words
A rotary steam engine as in claim 1 wherein a groove extends from the exhaust port substantially to the point of tangency.
References Cited (Backward Citations)
US835045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |