US3945210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy recovery
Assignee: RODINA ENERGY R AND D CORP
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Filing: 1974-06-07
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Granted: 1976-03-23
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Expires: 1994-06-07
Abstract
Abstract System for recovering waste heat energy produced by an internal combustion engine or other waste heat source. Heat energy present in the engine coolant or engine exhaust is used as a power source for a closed secondary power circuit operating on the Rankine cycle. The secondary power circuit incorporates a high efficiency compact evaporator system.
Inventors
- 👤 Bryan W. Chapin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:51
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/065; F01K25/00; F01K25/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
A secondary power system for recovering the waste heat energy of the coolant in a primary power system comprising: means forming a closed motive fluid circuit, said circuit containing motive fluid and, in series, a pump, a preheater, an evaporator, a motor and a condenser; means for passing a portion of said coolant directly from said primary system through said preheater in heat exchange relation with said motive fluid, and means for passing another portion of said coolant directly from said primary system through said evaporator in heat exchange relation with said motive fluid to vaporize said motive fluid for passage to said motor as a power source therefor.
Claim 2
Dependent Claim
109 words
A secondary power system for recovering the waste heat energy of the coolant in a primary power system comprising: means forming a closed motive fluid circuit, said circuit containing motive fluid and, in series, a pump, a preheater, an evaporator, a motor and a condenser; means for passing a portion of said coolant directly from said primary system through said preheater in heat exchange relation with said motive fluid, and means for passing another portion of said coolant directly from said primary system through said evaporator in heat exchange relation with said motive fluid to vaporize said motive fluid for passage to said motor as a power source therefor.
Claim 3
Dependent Claim
34 words
A system according to claim 1 wherein said evaporator comprises a plurality of tubes through which said motive fluid passes, and a flow restrictor in each of said tubes adjacent the downstream end thereof.
Claim 4
Dependent Claim
19 words
The system according to claim 2 wherein said preheater comprises a plurality of tubes through which said coolant passes.
Claim 5
Dependent Claim
36 words
The system according to claim 1 wherein said primary power system is an internal combustion engine, together with means for returning the coolant to said internal combustion engine after passage through said preheater and said evaporator.
Claim 6
Dependent Claim
119 words
For use with an internal combustion engine having a coolant circuit including a radiator, a secondary power system for recovering the waste heat energy in said coolant, said secondary power system including a closed motive fluid circuit having, in series, a pump, a heat exchanger and a motor, means for passing said coolant through said heat exchanger in heat exchange relation with said motive fluid and means for returning said coolant to said engine including temperature response means effective when the temperature of said coolant leaving said heat exchanger exceeds a predetermined value for preventing the direct return of said coolant to said engine and for causing said coolant to pass through said radiator before return to said engine.
Claim 7
Dependent Claim
119 words
For use with an internal combustion engine having a coolant circuit including a radiator, a secondary power system for recovering the waste heat energy in said coolant, said secondary power system including a closed motive fluid circuit having, in series, a pump, a heat exchanger and a motor, means for passing said coolant through said heat exchanger in heat exchange relation with said motive fluid and means for returning said coolant to said engine including temperature response means effective when the temperature of said coolant leaving said heat exchanger exceeds a predetermined value for preventing the direct return of said coolant to said engine and for causing said coolant to pass through said radiator before return to said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |