US3863452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas engine heater
Assignee: US Philips Corp
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Filing: 1973-08-15
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Granted: 1975-02-04
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Expires: 1993-08-15
Abstract
Abstract A hot-gas engine in which the heater is formed by a number of pipes which are arranged in the flow path of a combustion gas flow and which are arranged over a part of their length inside a common heat pipe which is elsewhere provided with a heat source so as to equalize the temperature of the pipes.
Inventors
- 👤 George Albert Apoloni Asselman
- 👤 Frits Reinink
- 👤 Der Leegte Joseph Wilhelmu Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:12
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
In a hot-gas engine including a burner providing a flow of hot combustion gases, an expansion space for working gas, and a heater using thermal energy from said combustion gases to heat said working gas, the heater formed of a plurality of pipes, each pipe having a first part thereof situated in the flow path of said combustion gases, the improvement in combination therewith comprising a heat pipe also situated in the flow path of said combustion gases, with a second part of each heater pipe situated inside the heat pipe, whereby said second parts of the heater pipes within the heat pipe are maintained at substantially the same temperature.
Claim 2
Dependent Claim
110 words
In a hot-gas engine including a burner providing a flow of hot combustion gases, an expansion space for working gas, and a heater using thermal energy from said combustion gases to heat said working gas, the heater formed of a plurality of pipes, each pipe having a first part thereof situated in the flow path of said combustion gases, the improvement in combination therewith comprising a heat pipe also situated in the flow path of said combustion gases, with a second part of each heater pipe situated inside the heat pipe, whereby said second parts of the heater pipes within the heat pipe are maintained at substantially the same temperature.
Claim 3
Dependent Claim
33 words
Apparatus according to claim 1 wherein said heat pipe has an annular shape, and said second parts of the heater pipes within the heat pipe are arranged to also define an annular shape.
Claim 4
Dependent Claim
50 words
Apparatus according to claim 1 wherein said heat pipe maintains the temperature of the heater pipe second parts therein at a temperature at least substantially equal to the mean temperature of the first parts of the heater pipes outside the heat pipe which are directly heated by the combustion gases.
Claim 5
Dependent Claim
63 words
Apparatus according to claim 2 wherein said engine has four working spaces situated annularly and in parallel about the engine axis, each comprising a compression and an expansion space, the compression space of each working space being in communication with the expansion space of another working space, said annular heat pipe and annular arrangement of heater pipes and engine axis all being coaxial.
Claim 6
Dependent Claim
42 words
Apparatus according to claim 4 wherein said heater pipes for the four cylinders form parts of a continuous conduit for said working gas, and said heat is a single component for providing thermal energy to all of said heater pipe second parts.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |