US3618576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recirculating exhaust gas system for internal combustion engines
Assignee: Individual
•
Filing: 1970-05-18
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Granted: 1971-11-09
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Expires: 1990-05-18
Abstract
Abstract A recirculating exhaust gas system for internal combustion engines includes a filter for solids, a condenser and cooler, a compressor and a secondary condenser and a liquid container, all in a closed circuit connecting the exhaust outlet of an internal combustion engine with the air and fuel inlet thereof. Solids and water are removed from the exhaust gas and the remaining gaseous products are condensed to a liquid and recycled to the engine along with new fuel and air supplies.
Inventors
- 👤 Paul F Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:28
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F02; F02B; F02B47/00; F02B47/04; F02B47/08; F02B47/10; F02G; F02G1/00; F02G1/02; F02M; F02M26/00; F02M26/13; F02M26/22; F02M26/23; F02M26/24; F02M26/35; F04; F04B; F04B47/00; F04B47/06; F04B47/08; F04B47/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A recirculating exhaust gas system for an internal combustion engine having an air and fuel inlet and an exhaust outlet, said system incorporating a solids separating filter, a water vapor condenser and gas cooler, a compressor, a secondary condenser and cooler and a liquid container, said system extending between said exhaust outlet and said air and fuel inlet.
Claim 2
Dependent Claim
58 words
A recirculating exhaust gas system for an internal combustion engine having an air and fuel inlet and an exhaust outlet, said system incorporating a solids separating filter, a water vapor condenser and gas cooler, a compressor, a secondary condenser and cooler and a liquid container, said system extending between said exhaust outlet and said air and fuel inlet.
Claim 3
Dependent Claim
73 words
The recirculating exhaust gas system of claim 1 and wherein the filter communicates with said exhaust outlet of said engine and with said condenser and gas cooler and wherein said condenser and gas cooler communicates with said compressor and said compressor communicates with said secondary condenser and cooler and said secondary condenser and cooler communicates with said liquid container, and said liquid container communicates with said air and fuel inlet of said engine.
Claim 4
Dependent Claim
45 words
The recirculating exhaust gas system of claim 1 and wherein an excess gas return line communicates with the intake sidE of said compressor and the intake side of said condenser and gas cooler and a relief valve is positioned in said excess gas return line.
Claim 5
Dependent Claim
24 words
The recirculating exhaust gas system of claim 1 and wherein said solids separating filter incorporates heat impervious filter elements and a solids collection area.
Claim 6
Dependent Claim
24 words
The recirculating exhaust gas system of claim 1 and wherein a valved water outlet is provided in said water vapor condenser and gas cooler.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |