US4075844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-gas reciprocating engine having controlled coupling of a combustion air fan
Assignee: US Philips Corp
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Filing: 1976-06-15
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Granted: 1978-02-28
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Expires: 1996-06-15
Abstract
Abstract A hot-gas reciprocating engine whose shaft is coupled to the combustion air fan via sucessively a variable transmission, constructed as a slip coupling whose degree of slip is inversely proportional to the temperature of the heater, and a fixed transmission.
Inventors
- 👤 Johannes W. Schiferli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:11
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G2243/00; F02G2243/02; F02G2243/04; F02G2270/00; F02G2270/85
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A hot-gas reciprocating engine, comprising at least one working space in which a working medium performs a thermodynamic cycle, a burner device, a heater for applying heat from the burner to the working medium, a fan on a fan shaft for applying combustion air to the burner device, and a variable transmission coupling a shaft of the engine to the fan, the transmission including an input shaft coupled to the engine shaft and an output shaft coupled to the fan shaft, the transmission ratio of said variable transmission being influenced by a control signal which represents an engine parameter, wherein between the output shaft to the variable transmission and the fan shaft a transmission having a fixed transmission ratio is coupled, the variable transmission is constructed as a slip coupling, and the engine comprises means for maintaining the degree of slip of the slip coupling inversely proportional to the heater temperature, said means including a temperature sensor for sensing temperature as the engine parameter.
Claim 2
Dependent Claim
164 words
A hot-gas reciprocating engine, comprising at least one working space in which a working medium performs a thermodynamic cycle, a burner device, a heater for applying heat from the burner to the working medium, a fan on a fan shaft for applying combustion air to the burner device, and a variable transmission coupling a shaft of the engine to the fan, the transmission including an input shaft coupled to the engine shaft and an output shaft coupled to the fan shaft, the transmission ratio of said variable transmission being influenced by a control signal which represents an engine parameter, wherein between the output shaft to the variable transmission and the fan shaft a transmission having a fixed transmission ratio is coupled, the variable transmission is constructed as a slip coupling, and the engine comprises means for maintaining the degree of slip of the slip coupling inversely proportional to the heater temperature, said means including a temperature sensor for sensing temperature as the engine parameter.
Claim 3
Dependent Claim
57 words
A hot-gas reciprocating engine as claimed in claim 1, wherein the slip coupling is constructed as a spring-loaded plate coupling and said means comprises a pressurized medium in a duct system for controlling slip coupling pressure, the temperature sensor actuating a pressure control member included in the duct system in order to control the medium control pressure.
Claim 4
Dependent Claim
23 words
A hot-gas reciprocating engine as claimed in claim 2, wherein the duct system forms part of a lubricating oil system of the engine.
References Cited (Backward Citations)
GB1281142A
Cited
US3859794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |