US3797247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound brayton-cycle engine
Assignee: Individual
•
Filing: 1972-08-10
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Granted: 1974-03-19
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Expires: 1992-08-10
Abstract
Abstract A system is disclosed incorporating a reciprocating-piston compressor and drive arrangement for converting a portion of the heat of a working fluid to attain a pressure increase, with the resulting working fluid supplied to a turbine. As disclosed, the reciprocating structure is a free-piston engine with the compressor piston and drive-engine piston an integral structure. The housing of the free-piston structure incorporates cooling structure, for example so that the reciprocating compressor may approach isothermal operation. As disclosed, working fluid is heated to drive the free-piston engine, exhausting to drive the turbine which supplies mechanical output power. Also as disclosed, the turbine drives a rotary compressor or supercharger, which supplies intake fluid to the free-piston compressor, the output of which supplies the heater.
Inventors
- 👤 E Schwartzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:15
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F02; F02C; F02C5/00; F02C5/06; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10S; Y10S60/00; Y10S60/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
An engine system for providing mechanIcal power from heat energy, comprising: a reciprocating-piston compressor connected to receive intake fluid for providing pressure fluid; a reciprocating-piston fluid-actuated drive engine for driving said reciprocating-piston compressor; a heater for receiving said heat energy to heat said pressure fluid from said compressor, said heater being connected to supply drive fluid to said drive engine; and a turbine means connected to be driven by exhaust fluid from said drive engine to provide mechanical power.
Claim 2
Dependent Claim
79 words
An engine system for providing mechanIcal power from heat energy, comprising: a reciprocating-piston compressor connected to receive intake fluid for providing pressure fluid; a reciprocating-piston fluid-actuated drive engine for driving said reciprocating-piston compressor; a heater for receiving said heat energy to heat said pressure fluid from said compressor, said heater being connected to supply drive fluid to said drive engine; and a turbine means connected to be driven by exhaust fluid from said drive engine to provide mechanical power.
Claim 3
Dependent Claim
17 words
An engine system according to claim 1 wherein said compressor and drive engine comprise a free-piston system.
Claim 4
Dependent Claim
31 words
An engine system according to claim 2 wherein said free-piston system includes a drive piston, a compressor piston mechanically connected to said drive piston and a cylindrical housing enclosing said pistons.
Claim 5
Dependent Claim
13 words
An engine system according to claim 3 wherein said pistons are axially aligned.
Claim 6
Dependent Claim
24 words
An engine system according to claim 2 further including a regenerator for transferring heat from fluid exhaust from said turbine, to said pressure fluid.
Claim 7
Dependent Claim
13 words
An engine system according to claim 3 wherein the housing includes cooling means.
Claim 8
Dependent Claim
30 words
An engine system according to claim 2 further including a rotary compressor connected to supply intake fluid to said reciprocating piston compressor, said rotary compressor being driven by said turbine.
Claim 9
Dependent Claim
26 words
An engine system according to claim 7 further including a cooling unit connected between said rotary compressor and said reciprocating-piston compressor for cooling said intake fluid.
Claim 10
Dependent Claim
28 words
A system according to claim 8 wherein said turbine means comprises a two-stage turbine with one stage providing said mechanical power and another stage driving said rotary compressor.
Claim 11
Dependent Claim
84 words
A system according to claim 2 wherein said free-piston system includes a drive piston, a compressor piston mechanically connected to said drive piston and a cylindrical housing enclosing said pistons, further including a regenerator for transferring heat from fluid exhaust from said turbine, to said pressure fluid, further including a rotary compressor connected to supply intake fluid to said reciprocating piston compressor, said rotary compressor being driven by said turbine, and further, a heater means for adding heat to supply the desired power output.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |