US3769798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-pollution exhaust system for an internal combustion engine
Assignee: Individual
•
Filing: 1972-03-22
•
Granted: 1973-11-06
•
Expires: 1992-03-22
Abstract
Abstract An anti-pollution exhaust system for an internal combustion engine in which the exhaust gases are first diluted and then are fed through a spiral pipe serving as a centrifugal separator to separate the heavier gaseous material from the lighter gaseous material. The heavier gaseous material is fed back to the air inlet of the carburetor to be burned in the engine. Fumes from the crankcase are fed to a condensing unit in which the liquid oil is retained until drained off with the remaining fumes being fed to the air inlet of the carburetor to be burned in the engine.
Inventors
- 👤 H Whittaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:27
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/06; F01; F01N; F01N3/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
An exhaust system for internal combustion engines of the type including a carburetor having an air filter comprising a spiral exhaust gas separator for receiving all of the exhaust gas from an internal combustion engine and separating the exhaust gas into a heavy component and a light component with said separator including a chamber, and a spiral tubular coil having a plurality of bores along the outer edge thereof communicating with said chamber, means extending from said coil in said separator to the atmosphere to convey the light component of the exhaust gases to the atmosphere, means extending from said chamber of said separator to the air filter of an internal combustion engine for feeding the heavier component through the engine, and means for supplying a stream of diluting cooling air under pressure to the exhaust gases just prior to entering the separator.
Claim 2
Dependent Claim
143 words
An exhaust system for internal combustion engines of the type including a carburetor having an air filter comprising a spiral exhaust gas separator for receiving all of the exhaust gas from an internal combustion engine and separating the exhaust gas into a heavy component and a light component with said separator including a chamber, and a spiral tubular coil having a plurality of bores along the outer edge thereof communicating with said chamber, means extending from said coil in said separator to the atmosphere to convey the light component of the exhaust gases to the atmosphere, means extending from said chamber of said separator to the air filter of an internal combustion engine for feeding the heavier component through the engine, and means for supplying a stream of diluting cooling air under pressure to the exhaust gases just prior to entering the separator.
Claim 3
Dependent Claim
49 words
A device as claimed in claim 1 including an oil condenser for said engine, means connecting the crankcase of said engine to said oil condenser to conduct oil fumes thereto, and means extending from said oil condenser to the air cleaner of said engine for conducting oil fumes thereto.
Claim 4
Dependent Claim
28 words
A device as claimed in claim 2 wherein means are provided on said oil condenser for admitting air to maintain said oil condenser at the desired vacuum level.
Claim 5
Dependent Claim
22 words
A device as claimed in claim 2 wherein means are provided on said oil condenser for collecting and discharging condensed oil therefrom.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |