Patent US3659573A successfully refreshed from Google Patents.
US3659573A
Expired / Lapsed
US
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Crankcase ventilating valve
Assignee: United Filtration Corp
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Filing: 1970-03-19
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Granted: 1972-05-02
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Expires: 1990-03-19
Abstract
Abstract A valve for controlling the crankcase ventilation for an internal combustion engine constructed to be much less expensive than prior valves but to have better performance characteristics due to a unique flow control.
Inventors
- 👤 Raymond G Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:22
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F16; F16K; F16K15/00; F16K15/02; F16K15/025; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6855; Y10T137/6858; Y10T137/6862; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7857
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
For use in an engine crankcase ventilating system, a metering valve adapted to be positioned in a conduit between the crankcase and the inlet manifold, the valve including a two-part housing with a passage through it for the flow of crankcase vapors, a pin having a small end in the passage in the housing having an exterior which is tailored to the blowby characteristics of the engine, a spring biasing said pin, and an orifice in the housing in the form of a washer having a passage therethrough surrounding the small end of the pin when the pin is in its free state and having an outstanding flange held between the two parts of the housing and the passage through said orifice being tapered and extending downstream to form a cylindrical flow regulator defining an annular flow orifice with the exterior of the pin, the various cross sections of the pin being less than the passage through the orifice and flow regulator in all normal positions of the pin.
Claim 2
Dependent Claim
169 words
For use in an engine crankcase ventilating system, a metering valve adapted to be positioned in a conduit between the crankcase and the inlet manifold, the valve including a two-part housing with a passage through it for the flow of crankcase vapors, a pin having a small end in the passage in the housing having an exterior which is tailored to the blowby characteristics of the engine, a spring biasing said pin, and an orifice in the housing in the form of a washer having a passage therethrough surrounding the small end of the pin when the pin is in its free state and having an outstanding flange held between the two parts of the housing and the passage through said orifice being tapered and extending downstream to form a cylindrical flow regulator defining an annular flow orifice with the exterior of the pin, the various cross sections of the pin being less than the passage through the orifice and flow regulator in all normal positions of the pin.
Claim 3
Dependent Claim
42 words
The structure of claim 1 further characterized in that the two parts of the housing are socketed together, one part being piloted into the other, with the opposed surfaces clamping the outstanding flange on the orifice between them in a tight joint.
Claim 4
Dependent Claim
27 words
The structure of claim 1 further characterized in that the spring surrounding and positioning the pin, at its large end, engages the outward flange on the orifice.
Claim 5
Dependent Claim
45 words
The structure of claim 1 further characterized by and including an inlet and outlet at each end of the passage through the housing, the inlet being aligned with the longitudinal direction of movement of the pin and the outlet being disposed at generally 90* thereto.
Claim 6
Dependent Claim
24 words
The structure of claim 1 further characterized in that the housing is made of plastic and the pin and orifice are made of metal.
References Cited (Backward Citations)
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US3105477A
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |