Patent US3764239A successfully refreshed from Google Patents.
US3764239A
Expired / Lapsed
US
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Rotary piston engine with trochoidal construction
Assignee: Dornier System GmbH
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Filing: 1971-12-06
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Granted: 1973-10-09
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Expires: 1991-12-06
Abstract
Abstract This invention relates to an improvement in a rotary piston engine, of trochoidal construction, wherein for pairing reasons the formation of the housing and the piston rotor is based not only upon the trochoid but also upon the inner or outer envelope curve branches being coordinated thereto, and wherein the gas check between two adjacent working spaces or chambers is effected by means of radial packing strips; the improvement comprising that the housing and piston rotor delimitations consist of a pair of parallel curves on the same side, facing away from the radial packing strip, of the gemoetrically exact curve and extending equidistantly with respect thereto.
Inventors
- 👤 F Huf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:42
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/22; F01C1/08; F01C1/082; F01C1/086; 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: 4
Claim 1
Independent Claim
258 words
A rotary piston engine of trochoidal construction, comprising; two major structural elements corresponding to a piston and a housing enclosing said piston, respectively, said structural elements forming working chambers between them, one of said structural elements having a shape corresponding exactly to a curve parallel to a geometrically exact trochoid, the other of said structural elements having a shape corresponding exactly to a curve parallel to a geometrically exact envelope curve of said trochoid, the distance of said curve parallel to said trochoid from said trochoid is greater than the distance of said curve parallel to said envelope curve from said envelope curve and both of said parallel curves are on the same side of said trochoid and said envelope curver, respectively and radial sealing strips, said sealing strips being mounted on said structural element having a shape corresponding to a curve parallel to said envelope curve, adapted to slide on said structural element having a shape corresponding to a curve parallel to said trochoid and form a seal between each pair of adjacent working chambers, positioned on the side of one of said trochoid and said envelope curve opposite said two parallel curves and having that portion, which slides on said structural element having a shape corresponding to a curve parallel to said trochoid, formed as a semi-cylinder whose radius is equal to said distance of said curve parallel to said trochoid from said trochoid and whose axis passes through said trochoid at the point of intersection of the inner and outer envelope curves of said trochoid.
Claim 2
Dependent Claim
258 words
A rotary piston engine of trochoidal construction, comprising; two major structural elements corresponding to a piston and a housing enclosing said piston, respectively, said structural elements forming working chambers between them, one of said structural elements having a shape corresponding exactly to a curve parallel to a geometrically exact trochoid, the other of said structural elements having a shape corresponding exactly to a curve parallel to a geometrically exact envelope curve of said trochoid, the distance of said curve parallel to said trochoid from said trochoid is greater than the distance of said curve parallel to said envelope curve from said envelope curve and both of said parallel curves are on the same side of said trochoid and said envelope curver, respectively and radial sealing strips, said sealing strips being mounted on said structural element having a shape corresponding to a curve parallel to said envelope curve, adapted to slide on said structural element having a shape corresponding to a curve parallel to said trochoid and form a seal between each pair of adjacent working chambers, positioned on the side of one of said trochoid and said envelope curve opposite said two parallel curves and having that portion, which slides on said structural element having a shape corresponding to a curve parallel to said trochoid, formed as a semi-cylinder whose radius is equal to said distance of said curve parallel to said trochoid from said trochoid and whose axis passes through said trochoid at the point of intersection of the inner and outer envelope curves of said trochoid.
Claim 3
Dependent Claim
70 words
A rotary piston engine according to claim 1 wherein the structural element having a shape corresponding to a curve parallel to an envelope curve of the trochoid has a shape corresponding to a curve parallel to a geometrically exact inner envelope curve of said trochoid and is outside said envelope curve and the structure element having a shape corresponding to a curve parallel to said trochoid is outside said trochoid.
Claim 4
Dependent Claim
71 words
A rotary piston engine according to claim 1 wherein the structural element having a shape corresponding to a curve parallel to an envelope curve of the trochoid has a shape corresponding to a curve parallel to a geometrically exact outer envelope curve of said trochoid and is inside said outer envelope curve and the structural element having a shape corresponding to a curve parallel to said trochoid is inside said trochoid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |