Patent US4069671A successfully refreshed from Google Patents.
US4069671A
Expired / Lapsed
US
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Stirling engine combustion assembly
Assignee: United Stirling AB and Co
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Filing: 1976-07-02
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Granted: 1978-01-24
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Expires: 1996-07-02
Abstract
Abstract In a double-acting multi-cylinder V-configuration Stirling cycle engine having a single burner unit, the regenerator-cooler units are clustered around a central axis of the heater head with radially extending heater pipes to keep manifold volumes small and temperatures on the heater pipes high.
Inventors
- 👤 John Osvald Berntell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044; F02G2244/00; F02G2244/02; F02G2244/06; F02G2244/10; F02G2244/50; F02G2270/00; F02G2270/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A multiple-cylinder double-acting hot gas engine having a single burner unit having a plurality of regenerator-cooler units interconnected with respective ones of said cylinders by heater pipes wherein the burner unit has a heater head disposed about a central axis to direct combustion gases toward said heater pipes, wherein said cylinders are disposed about said central axis with said regenerator-cooler units clustered around said central axis inside said cylinders, and wherein the regenerator-cooler units are mounted in a common housing.
Claim 2
Dependent Claim
80 words
A multiple-cylinder double-acting hot gas engine having a single burner unit having a plurality of regenerator-cooler units interconnected with respective ones of said cylinders by heater pipes wherein the burner unit has a heater head disposed about a central axis to direct combustion gases toward said heater pipes, wherein said cylinders are disposed about said central axis with said regenerator-cooler units clustered around said central axis inside said cylinders, and wherein the regenerator-cooler units are mounted in a common housing.
Claim 3
Dependent Claim
28 words
A hot gas engine according to claim 1, wherein the heater pipes have portions which extend approximately radially outwards with respect to the said axis from the regenerators.
Claim 4
Dependent Claim
24 words
A hot gas engine according to claim 2, wherein the heater pipe portions which extend approximately radially outwards are substantially co-planar with each other.
Claim 5
Dependent Claim
40 words
A hot gas engine according to claim 1, wherein the cylinders are disposed in V-configuration and the pistons therein are connected to a common crank-shaft, and the burner unit is arranged to direct hot combustion products towards the crank-shaft axis.
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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |