US3822553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot gas engine heater heads
Assignee: United Stirling AB and Co
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Filing: 1973-08-15
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Granted: 1974-07-09
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Expires: 1993-08-15
Abstract
Abstract Four pairs of manifolds of the heater head have four corresponding pipes disposed in 90* segments of a circle with the ends bent more than 90* to connect with the manifolds. This configuration provides improved engine efficiency by uniform heating and shielding of the manifolds from the most intensive radiation and convection by parts of the pipes disposed between the manifolds and the center of the heater head.
Inventors
- 👤 P Grahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/055
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
A hot gas engine heater head of the kind comprising at least one pair of parallel manifolds connected to at least one cylinder top and one top of a regenerator-cooler unit, the two manifolds in each said pair of manifolds being interconnected by substantially parallel pipes extending in planes perpendicular to the axis of the manifolds, characterised in that said pipes are formed as segments of circles along the greater parts of their lengths and that adjacent to their ends they are bent through more than 90* prior to their connections to said manifolds.
Claim 2
Dependent Claim
94 words
A hot gas engine heater head of the kind comprising at least one pair of parallel manifolds connected to at least one cylinder top and one top of a regenerator-cooler unit, the two manifolds in each said pair of manifolds being interconnected by substantially parallel pipes extending in planes perpendicular to the axis of the manifolds, characterised in that said pipes are formed as segments of circles along the greater parts of their lengths and that adjacent to their ends they are bent through more than 90* prior to their connections to said manifolds.
Claim 3
Dependent Claim
34 words
A heater head according to claim 1, characterised in that it comprises four pairs of manifolds and that the said segments are of substantially equal length each extending through approximately 90* of a circle.
References Cited (Backward Citations)
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Cited
US2828601A
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US3074229A
Cited
US3223155A
Cited
US3412787A
Cited
US3662817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |