US3589108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner for crankcase ventilation system
Assignee: Motors Liquidation Co
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Filing: 1969-05-21
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Granted: 1971-06-29
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Expires: 1989-05-21
Abstract
Abstract An air cleaner for a closed positive crankcase ventilation system includes an air filter having a pleated filter element which has an enlarged pleat outwardly surrounding the air intake for the ventilation system and a cylindrical filter element disposed inwardly of the pleats and defining with the enlarged pleat a filtering chamber in which the air flowing through the ventilation system to the crankcase during normal engine operating conditions is filtered by the enlarged pleat and the excess blowby gases and crankcase vapors flowing from the crankcase to engine carburetor during high-speed operation of the engine are filtered by the cylindrical filter element.
Inventors
- 👤 Ronald J Dingel
- 👤 Wesley D Tomlinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02M25/00; F02M25/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
An air cleaner adapted for use in a closed positive crankcase ventilation system on an internal combustion engine induction system wherein the air cleaner comprises: a housing formed by an upper member and a lower member, said housing having an air inlet and an air outlet spaced therefrom and adapted to register with the induction system of said engine; an air filter positioned between the air inlet and air outlet having spaced annular end caps disposed interior of said housing with said end caps sealingly engaging said upper member and said lower member, said filter including a first annular accordion-pleated filter element bonded to said end caps having one enlarged pleat, and a second cylindrical filter element disposed within said first-mentioned filter element and in abutment therewith and bonded to said annular end caps to make up a unitized filter and form a filtering chamber with said one pleat, an aperture formed in said housing and in one of said end caps with said aperture being within said one enlarged pleat and in registration with said filtering chamber.
Claim 2
Dependent Claim
178 words
An air cleaner adapted for use in a closed positive crankcase ventilation system on an internal combustion engine induction system wherein the air cleaner comprises: a housing formed by an upper member and a lower member, said housing having an air inlet and an air outlet spaced therefrom and adapted to register with the induction system of said engine; an air filter positioned between the air inlet and air outlet having spaced annular end caps disposed interior of said housing with said end caps sealingly engaging said upper member and said lower member, said filter including a first annular accordion-pleated filter element bonded to said end caps having one enlarged pleat, and a second cylindrical filter element disposed within said first-mentioned filter element and in abutment therewith and bonded to said annular end caps to make up a unitized filter and form a filtering chamber with said one pleat, an aperture formed in said housing and in one of said end caps with said aperture being within said one enlarged pleat and in registration with said filtering chamber.
Claim 3
Dependent Claim
203 words
An air cleaner adapted for use in a closed positive crankcase ventilation system on an internal combustion engine induction system wherein the air cleaner comprises: a housing formed by an upper member and a lower member, said housing having an air inlet and an air outlet spaced therefrom and adapted to register with the induction system of said engine; an air filter positioned between the air inlet and air outlet having spaced annular end caps disposed interior of said housing with said end caps sealingly engaging said upper member and said lower member, said filter including a first annular accordion-pleated filter element bonded to said end caps having one enlarged pleat, and a second cylindrical filter element disposed within said first-mentioned filter element and in abutment therewith and bonded to said annular end caps to make up a unitized filter and form a filtering chamber with said one pleat, an aperture formed in said lower member and in said one end cap engaging said lower member, with said aperture being within said one enlarged pleat and in registration with said filtering chamber; said one enlarged pleat being configured to conform to the shape of the aperture in said lower member and end cap.
Claim 4
Dependent Claim
203 words
An air cleaner adapted for use in a closed positive crankcase ventilation system on an internal combustion engine induction system wherein the air cleaner comprises: a housing formed by an upper member and a lower member, said housing having an air inlet and an air outlet spaced therefrom and adapted to register with the induction system of said engine; an air filter positioned between the air inlet and air outlet having spaced annular end caps disposed interior of said housing with said end caps sealingly engaging said upper member and said lower member, said filter including a first annular accordion-pleated filter element bonded to said end caps having one enlarged pleat, and a second cylindrical filter element disposed within said first-mentioned filter element and in abutment therewith and bonded to said annular end caps to make up a unitized filter and form a filtering chamber with said one pleat, an aperture formed in said lower member and in said one end cap engaging said lower member, with said aperture being within said one enlarged pleat and in registration with said filtering chamber; said one enlarged pleat being configured to conform to the shape of the aperture in said lower member and end cap.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |