Patent EP0231023A2 successfully refreshed from Google Patents.
US3800526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot gas engine constructed as rotary piston engine
Assignee: Daimler Benz AG
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Filing: 1971-03-29
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Granted: 1974-04-02
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Expires: 1991-03-29
Abstract
Abstract A hot gas engine in the form of a rotary piston internal combustion engine of trochoidal type of construction in which one or several pairs of working chambers of the rotary piston engine serve as warm and cold spaces of the hot gas engine which are connected with one another.
Inventors
- 👤 E Braun
- 👤 J Wahnschaffe
- 👤 D Gwinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:25
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02B; F02B53/00; F02B2053/005; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
183 words
A hot gas engine: a chamber, a polygonal piston rotatably mounted in said chamber, a working medium disposed in said chamber, said chamber and said piston delimiting first and second cold working chamBer spaces and first and second warm working chamber spaces, first line means operatively interconnecting said first cold chamber space with said first warm chamber space such that at least a portion of the working medium is communicated from said first cold chamber space to said first warm chamber space during part of the rotation of the piston and from said first warm chamber space to said first cold chamber space during another part of the rotation of the piston, and second line means operatively interconnecting said second cold chamber space with said second warm chamber space such that at least a portion of the working medium is communicated from said second cold chamber space to said second warm chamber space during part of the rotation of the piston and from said second warm chamber space to said second cold chamber space during another part of the rotation of the piston.
Claim 2
Dependent Claim
183 words
A hot gas engine: a chamber, a polygonal piston rotatably mounted in said chamber, a working medium disposed in said chamber, said chamber and said piston delimiting first and second cold working chamBer spaces and first and second warm working chamber spaces, first line means operatively interconnecting said first cold chamber space with said first warm chamber space such that at least a portion of the working medium is communicated from said first cold chamber space to said first warm chamber space during part of the rotation of the piston and from said first warm chamber space to said first cold chamber space during another part of the rotation of the piston, and second line means operatively interconnecting said second cold chamber space with said second warm chamber space such that at least a portion of the working medium is communicated from said second cold chamber space to said second warm chamber space during part of the rotation of the piston and from said second warm chamber space to said second cold chamber space during another part of the rotation of the piston.
Claim 3
Dependent Claim
37 words
An engine according to claim 1, wherein a cooler means, a regenerator means and a heater means are serially arranged in said first line means with said cooler means being closest to said first cold chamber space.
Claim 4
Dependent Claim
41 words
An engine according to claim 1, wherein a cooler means, a regenerator means and a heater means are arranged in each of the first and second line means with said respective cooler means being closest to said respective cold chamber spaces.
Claim 5
Dependent Claim
50 words
An engine according to claim 1, wherein the piston is of eiptrochoidal shape with an odd number of arcs, wherein said chamber has an even number of arcs formed in the walls thereof and wherein said respective chamber spaces are delimited on the outside by respective arcs of said chamber.
Claim 6
Dependent Claim
26 words
An engine according to claim 4, wherein the number of arcs of the piston is 2n-1 and the number of arcs of said chamber is 2n.
Claim 7
Dependent Claim
47 words
An engine according to claim 5, wherein the piston has three arcs, wherein the chamber has four arcs, wherein two of said chamber arcs delimit said first cold and warm chamber spaces while the other two of said chamber arcs said second cold and warm chamber spaces.
Claim 8
Dependent Claim
41 words
An engine according to claim 6, wherein a cooler means, a regenerator means and a heater means are arranged in each of the first and second line means with said respective cooler means being closest to said respective cold chamber spaces.
Claim 9
Dependent Claim
30 words
An engine according to claim 1, wherein said first cold chamber space and said first warm chamber space are spaced 90* from one another around the circumference of the chambers.
Claim 10
Dependent Claim
73 words
An engine according to claim 3, wherein said first cold chamber space and said first warm chamber space are spaced 90* from one another around the circumference of the chambers, and wherein said second cold chamber space is spaced 90* from each of said first and second warm chamber spaces and 180* from said first cold chamber space, whereby six complete closed thermodynamic cycles are realized upon each complete rotation of the piston.
Claim 11
Dependent Claim
73 words
An engine according to claim 7, wherein said first cold chamber space and said first warm chamber space are spaced 90* from one another around the circumference of the chambers, and wherein said second cold chamber space is spaced 90* from each of said first and second warm chamber spaces and 180* from said first cold chamber space, whereby six complete closed thermodynamic cycles are realized upon each complete rotation of the piston.
Claim 12
Dependent Claim
54 words
An engine according to claim 7, wherein said chamber is bounded by chamber walls, and wherein said first line means is so constructed that, during a single revolution of the piston with respect to respective walls forming said chamber, the flow of working medium through said first line means reverses directions at least once.
Claim 13
Dependent Claim
63 words
An engine according to claim 1, wherein said chamber is bounded by chamber walls, and wherein said first line means is so constructed that, during a single revolution of the piston with respect to respective walls forming saId chamber, the flow of working medium through said first line means and associated cooler means, regenerator means, and heater means reverses directions at least once.
Claim 14
Dependent Claim
58 words
An engine according to claim 1, wherein said chamber is bounded by chamber walls, and wherein said first and second line means are so constructed that, during a single revolution of the piston with respect to respective chamber walls, the flow of working medium through each of said first and second line means reverses directions at least once.
Claim 15
Dependent Claim
67 words
An engine according to claim 3, wherein said chamber is bounded by chamber walls, wherein said first and second line means are so constructed that, during a single revolution of the piston with respect to respective chamber walls, the flow of working medium through each of said first and second line means and associated respective cooler means, regenerator means, and heater means, reverses directions at least once.
Claim 16
Dependent Claim
73 words
An engine according to claim 14, wherein said first cold chamber space and said first warm chamber space are spaced 90* from one another around the circumference of the chambers, and wherein said second cold chamber space is spaced 90* from each of said first and second warm chamber spaces and 180* from said first cold chamber space, whereby six complete closed thermodynamic cycles are realized upon each complete rotation of the piston.
Claim 17
Dependent Claim
17 words
An engine according to claim 1, wherein only one chamber with only one polygonal piston is provided.
Claim 18
Dependent Claim
17 words
An engine according to claim 11, wherein only one chamber with only one polygonal piston is provided.
Claim 19
Dependent Claim
17 words
An engine according to claim 12, wherein only one chamber with only one polygonal piston is provided.
Claim 20
Dependent Claim
17 words
An engine according to claim 14, wherein only one chamber with only one polygonal piston is provided.
Claim 21
Dependent Claim
33 words
An engine according to claim 3, wherein said chamber, said first and second line means, and said respective cooler means, regenerator means, and heater means form a closed system for the working medium.
Claim 22
Dependent Claim
33 words
An engine according to claim 14 wherein said chamber, said first and second line means, and said respective cooler means, regenerator means, and heater means form a closed system for the working medium.
Claim 23
Dependent Claim
33 words
An engine according to claim 15, wherein said chamber, said first and second line means, and said respective cooler means, regenerator means, and heater means form a closed system for the working medum.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |