Patent US4117679A successfully refreshed from Google Patents.
US4117679A
Expired / Lapsed
US
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Hot gas engine heater head
Assignee: United Stirling AB and Co
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Filing: 1977-03-02
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Granted: 1978-10-03
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Expires: 1997-03-02
Abstract
Abstract A heater head is arranged about the central axis of a multiple cylinder hot gas turbine with a manifold ring of a diameter substantially smaller than the combustion chamber and connected to cylinders and regenerators by heat exchanger tubes extending upwardly therefrom and inwardly toward the manifold.
Inventors
- 👤 Per Goran Grahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:01
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055; F02G2244/00; F02G2244/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A hot gas engine heater head comprising in combination, a set of cylinders and regenerators positioned about an axis, a combustion chamber surrounding said axis with a predetermined internal diameter, heat exchange tubes connecting said cylinders and regenerators extending upwardly into said combustion chamber and inwardly toward said axis, and a set of manifold segments coupling together the respective heat exchange tubes connecting said cylinders and regenerators forming a ring about said axis of a diameter substantially smaller than that of said combustion chamber.
Claim 2
Dependent Claim
84 words
A hot gas engine heater head comprising in combination, a set of cylinders and regenerators positioned about an axis, a combustion chamber surrounding said axis with a predetermined internal diameter, heat exchange tubes connecting said cylinders and regenerators extending upwardly into said combustion chamber and inwardly toward said axis, and a set of manifold segments coupling together the respective heat exchange tubes connecting said cylinders and regenerators forming a ring about said axis of a diameter substantially smaller than that of said combustion chamber.
Claim 3
Dependent Claim
29 words
A heater head according to claim 1, wherein the mean diameter of the manifold ring is not greater than one half of the internal diameter of the combustion chamber.
Claim 4
Dependent Claim
29 words
A heater head as defined in claim 1, wherein said manifold segments are joined to said heat exchange tubes at a plurality of at least two vertically displaced positions.
Claim 5
Dependent Claim
92 words
A heater head according to claim 3, wherein each of said heat exchange tubes has an approximately vertical portion and an inwardly-extending portion, the latter having an end connected to a respective one of said manifold segments and the approximately vertical portion having an end connected to a respective cylinder or regenerator top, and the inwardly-extending portions being inclined relative to one another so that gaps for the passage of combustion gases between the inwardly-extending portions are of substantially constant effective width and resistance to the flow of the said combustion gases.
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) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |