Patent US3699770A successfully refreshed from Google Patents.
US3699770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirling engine control system
Assignee: Motors Liquidation Co
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Filing: 1971-05-27
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Granted: 1972-10-24
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Expires: 1991-05-27
Abstract
Abstract A working gas control system for a double acting hot gas engine particularly adapted for vehicle installation and including a manually adjustable system for variably controlling the pressure of the engine working gas to provide for load control of the engine. The system includes a gas reservoir for working gas to supply the engine system with gas at a suitable mean working pressure through an operator actuator control system. A gas supply tank is provided to maintain a predetermined minimum gas pressure in the reservoir.
Inventors
- 👤 James E Bennethum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/045; F02G1/05; F02G2270/00; F02G2270/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
278 words
A power control system for a hot gas engine of the type having a plurality of closed variable volume working chambers each having a hot space and a cold space and adapted to contain a working gas, said engine including means for heating and for cooling such working gas and means to transfer such gas between said hot and cold chambers while passing it through a working cycle, said control system comprising: a gas storage reservoir means including a gas reservoir and a supply tank interconnected by a pair of conduits, one of which contains a pressure regulator valve to control the flow of gas from said supply tank to said reservoir and the other containing a one-way check valve connecting said reservoir to said supply tank, first gas transfer means connecting said reservoir with said engine working chambers for unidirectional gas flow from said reservoir to the individual chambers, second gas transfer means connecting said reservoir with said engine working chambers for unidirectional gas flow from the individual chambers to said reservoir, regulating means arranged to control the admission to and exhaust from said working chambers of working gas through said first and second gas transfer means respectively and a gas pump in said second gas transfer means between said regulating means and said reservoir and adapted to aid the return flow of gas to said reservoir when the return flow of gas is below a predetermined pressure relative to the pressure of gas in the reservoir while permitting direct return flow of gas to said reservoir when the return flow of gas is above a predetermined pressure relative to the pressure of gas in the reservoir.
Claim 2
Dependent Claim
278 words
A power control system for a hot gas engine of the type having a plurality of closed variable volume working chambers each having a hot space and a cold space and adapted to contain a working gas, said engine including means for heating and for cooling such working gas and means to transfer such gas between said hot and cold chambers while passing it through a working cycle, said control system comprising: a gas storage reservoir means including a gas reservoir and a supply tank interconnected by a pair of conduits, one of which contains a pressure regulator valve to control the flow of gas from said supply tank to said reservoir and the other containing a one-way check valve connecting said reservoir to said supply tank, first gas transfer means connecting said reservoir with said engine working chambers for unidirectional gas flow from said reservoir to the individual chambers, second gas transfer means connecting said reservoir with said engine working chambers for unidirectional gas flow from the individual chambers to said reservoir, regulating means arranged to control the admission to and exhaust from said working chambers of working gas through said first and second gas transfer means respectively and a gas pump in said second gas transfer means between said regulating means and said reservoir and adapted to aid the return flow of gas to said reservoir when the return flow of gas is below a predetermined pressure relative to the pressure of gas in the reservoir while permitting direct return flow of gas to said reservoir when the return flow of gas is above a predetermined pressure relative to the pressure of gas in the reservoir.
Claim 3
Dependent Claim
83 words
A power control system according to claim 1 wherein said gas reservoir is sized in respect to the volumes of said engine working spaces and the components of said first and second gas transfer means such that said volumes can be supplied with gas from said reservoir to the maximum mean working pressure condition from only said reservoir, additional gas from said supply tank flowing to said reservoir at a predetermined pressure below the maximum mean working pressure through said pressure regulator valve.
Claim 4
Dependent Claim
68 words
A power control system according to claim 1, further including bypass valve means interconnecting out of phase pairs of said closed variable volume working chambers to permit the bypassing of gas from said out of phase working chambers to effect rapid reduction of engine output torque thereby and pressure responsive means and manually actuated lever means in said regulating means to effect operation of said bypass valve means.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |