Patent US3996745A successfully refreshed from Google Patents.
US3996745A
Expired / Lapsed
US
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Stirling cycle type engine and method of operation
Assignee: D CYCLE ASSOC
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Filing: 1975-07-15
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Granted: 1976-12-14
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Expires: 1995-07-15
Abstract
Abstract An improved Stirling cycle type engine is provided wherein the working fluid is a condensible fluid such as steam and a portion of the steam is condensed prior to the introduction of the steam into the cold cylinder zone. Before and/or during compression of the steam in the cold cylinder zone, water is injected in an amount equal to, greater than or less than the amount condensed.
Inventors
- 👤 John Gordon Davoud
- 👤 Jerry Allen Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:20
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044; F02G2253/00; F02G2253/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A method of operating a Stirling cycle type engine comprising the steps: A. directing a heated heat exchange fluid externally about the hot end of a cylinder of a Stirling cycle type engine and in indirect heat exchange with a condensible working fluid; B. directing the heated vapor of the working fluid from the hot cylinder through a heat exchanger; C. condensing a portion of the vapor after it has passed through the heat exchanger; D. directing the remaining portion of the vapor to the cold cylinder space of the Stirling cycle type engine; and
Claim 2
Independent Claim
95 words
A method of operating a Stirling cycle type engine comprising the steps: A. directing a heated heat exchange fluid externally about the hot end of a cylinder of a Stirling cycle type engine and in indirect heat exchange with a condensible working fluid; B. directing the heated vapor of the working fluid from the hot cylinder through a heat exchanger; C. condensing a portion of the vapor after it has passed through the heat exchanger; D. directing the remaining portion of the vapor to the cold cylinder space of the Stirling cycle type engine; and
Claim 3
Dependent Claim
36 words
E. before and during compression of the vapor in the cold cylinder space injecting a liquid of the working fluid in an amount equal to, greater than or less than the portion condensed in step C.
Claim 4
Dependent Claim
36 words
E. before and during compression of the vapor in the cold cylinder space injecting a liquid of the working fluid in an amount equal to, greater than or less than the portion condensed in step C.
Claim 5
Dependent Claim
60 words
The method of operating a Stirling cycle type engine as defined in claim 1 wherein the heat exchange fluid directed externally about the hot end of a cylinder of a Stirling cycle type engine and in indirect heat exchange with a condensible working fluid is selected from the group consisting of tetraphenyl silane; Dowtherm A; Therminol 88; and elemental sulphur.
Claim 6
Dependent Claim
22 words
The method of operating a Stirling cycle type engine comprising the steps defined in claim 1 wherein the working fluid comprises water.
Claim 7
Dependent Claim
32 words
The method of operating a Stirling cycle type engine as defined in claim 1 wherein the amount of liquid injected in step E is equal to the amount condensed in step C.
Claim 8
Dependent Claim
32 words
The method of operating a Stirling cycle type engine as defined in claim 1 wherein the amount of liquid injected in step E is greater than the amount condensed in step C.
Claim 9
Dependent Claim
32 words
The method of operating a Stirling cycle type engine as defined in claim 1 wherein the amount of liquid injected in step E is less than the amount condensed in step C.
Claim 10
Dependent Claim
147 words
A Stirling cycle type power generating means comprising: A. means directing a heated heat exchange fluid externally about a hot end of a cylinder of a Stirling cycle type engine and means for directing said heat exchange fluid in indirect heat exchange with a condensible working fluid; B. means for directing the heated vapor of the working fluid from the hot cylinder space through a heat exchanger; C. means for condensing a portion of the vapor after it has passed through the heat exchanger; D. means for directing the remaining portion of the vapor to the cold cylinder space of the Stirling engine; and E. means for injecting a liquid of the working fluid in an amount equal to, greater than or less than the portion of the working fluid condensed in the condenser means during and/or before compression of the vapor in the cold cylinder space.
Claim 11
Dependent Claim
147 words
A Stirling cycle type power generating means comprising: A. means directing a heated heat exchange fluid externally about a hot end of a cylinder of a Stirling cycle type engine and means for directing said heat exchange fluid in indirect heat exchange with a condensible working fluid; B. means for directing the heated vapor of the working fluid from the hot cylinder space through a heat exchanger; C. means for condensing a portion of the vapor after it has passed through the heat exchanger; D. means for directing the remaining portion of the vapor to the cold cylinder space of the Stirling engine; and E. means for injecting a liquid of the working fluid in an amount equal to, greater than or less than the portion of the working fluid condensed in the condenser means during and/or before compression of the vapor in the cold cylinder space.
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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |