US3877451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
PCV valve filter
Assignee: Individual
•
Filing: 1973-12-28
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Granted: 1975-04-15
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Expires: 1993-12-28
Abstract
Abstract A PCV valve filter is provided that includes a means for mounting the filter between an engine crank case and a PCV valve. There is provided for the filter a housing and cover as well as a cartridge that can be removed and replaced when desired.
Inventors
- 👤 Virgil J Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:34
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411; B01D46/0002; B01D46/0005; F; F01; F01M; F01M13/00; F01M13/04; F01M2013/0438
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A PCV valve filter for internal combustion engines of the type which include a crankcase, an intake manifold and a PCV valve connecting said crankcase to said intake manifold for venting the fumes from the intake manifold comprising a hollow stem having an internally threaded end portion and an externally threaded opposite end portion, a housing secured on said stem and having said stem extending therethrough, a cover mounted on said housing, a securing element extending through said cover and engaging the internally threaded end portion of said stem, said stem having a plurality of openings therein, a filter material cartridge arranged in said housing surrounding said stem, resilient means mounted on said securing element adjacent said cover for supporting said cartridge in position on said stem, a mounting bracket securing said housing to said engine and a pair of hoses detachably secured to said housing and connected between said PCV valve and said crankcase.
Claim 2
Dependent Claim
155 words
A PCV valve filter for internal combustion engines of the type which include a crankcase, an intake manifold and a PCV valve connecting said crankcase to said intake manifold for venting the fumes from the intake manifold comprising a hollow stem having an internally threaded end portion and an externally threaded opposite end portion, a housing secured on said stem and having said stem extending therethrough, a cover mounted on said housing, a securing element extending through said cover and engaging the internally threaded end portion of said stem, said stem having a plurality of openings therein, a filter material cartridge arranged in said housing surrounding said stem, resilient means mounted on said securing element adjacent said cover for supporting said cartridge in position on said stem, a mounting bracket securing said housing to said engine and a pair of hoses detachably secured to said housing and connected between said PCV valve and said crankcase.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |