US3570461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive crankcase ventilating devices
Assignee: Nycal Co Inc
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Filing: 1969-12-02
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Granted: 1971-03-16
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Expires: 1989-12-02
Abstract
Abstract Connected into the downdraft side of the carburetor at one end and adapted to be connected via a conduit into the crankcase at the other end, an adjustable flow control valve is cam operated by the accelerator pedal linkage or mechanism which controls the degree of opening of the butterfly valve, or engine throttle. The valve has a range between a minimum and a maximum flow positions and is adjusted to provide for minimum flow when the throttle is at its minimum opening while the engine is idling and for maximum flow when the throttle is wide open at its maximum position.
Inventors
- 👤 Vincent Guarnaschelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:53
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
244 words
In an internal combustion engine having an opening into the downdraft side of the carburetor thereof, a housing having a longitudinal passage therethrough and including an inlet end and an outlet end, said outlet end being connected to said opening, said housing having a second passage extending therethrough at an angle to said longitudinal passage and intersecting said longitudinal passage, a stem longitudinally slideablE in said second passage and having a third passage extending therethrough in the same direction as said longitudinal passage, said longitudinal passage and said third passage having substantially the same cross-sectional area, limit stop means limiting slideable movement of said stem between a first position in which said longitudinal passage and said third passage are in minimum mutual alignment and a second position in which the same are substantially in maximum mutual alignment, said inlet end of the housing being adapted to be connected to a conduit leading from the crankcase of the engine to convey crankcase gases into said opening, a cam operatively connected to the accelerator mechanism of the engine and engaging the end of said stem remote from said housing for rotation of the cam proportionally as the butterfly valve of the engine is actuated, said cam having a configuration such that it moves said stem from said first position toward said second position proportionally as said butterfly valve is more widely opened, and means on said stem for normally urging said stem into said first position.
Claim 2
Dependent Claim
244 words
In an internal combustion engine having an opening into the downdraft side of the carburetor thereof, a housing having a longitudinal passage therethrough and including an inlet end and an outlet end, said outlet end being connected to said opening, said housing having a second passage extending therethrough at an angle to said longitudinal passage and intersecting said longitudinal passage, a stem longitudinally slideablE in said second passage and having a third passage extending therethrough in the same direction as said longitudinal passage, said longitudinal passage and said third passage having substantially the same cross-sectional area, limit stop means limiting slideable movement of said stem between a first position in which said longitudinal passage and said third passage are in minimum mutual alignment and a second position in which the same are substantially in maximum mutual alignment, said inlet end of the housing being adapted to be connected to a conduit leading from the crankcase of the engine to convey crankcase gases into said opening, a cam operatively connected to the accelerator mechanism of the engine and engaging the end of said stem remote from said housing for rotation of the cam proportionally as the butterfly valve of the engine is actuated, said cam having a configuration such that it moves said stem from said first position toward said second position proportionally as said butterfly valve is more widely opened, and means on said stem for normally urging said stem into said first position.
Claim 3
Dependent Claim
15 words
In an internal combustion engine according to claim 1, said angle being an acute angle.
Claim 4
Dependent Claim
21 words
In an internal combustion engine according to claim 1, said second passage and said stem being complementarily noncircular in cross section.
Claim 5
Dependent Claim
21 words
In an internal combustion engine according to claim 1, said second passage and said stem being complementarily rectangular in cross section.
Claim 6
Dependent Claim
21 words
In an internal combustion engine according to claim 2, said second passage and said stem being complementarily rectangular in cross section.
Claim 7
Dependent Claim
73 words
In an internal combustion engine according to claim 1, said stem extending through both sides of said housing, said limit stop means comprising a first projection on the stem on one side of the housing engageable with the housing when said stem is in said first position and a second projection on the stem on the other side of the housing engageable with the housing when said stem is in said second position.
Claim 8
Dependent Claim
25 words
In an internal combustion engine according to claim 6, said means consisting of a spring surrounding positioned between one of said projections and said housing.
Claim 9
Dependent Claim
49 words
In an internal combustion engine according to claim 7, said means consisting of a coiled spring surrounding positioned between said second projection and said housing. 9 In an internal combustion engine according to claim 6, said second projection including an adjustable screw whose axis is directed toward said housing.
Claim 10
Dependent Claim
21 words
In an internal combustion engine according to claim 2, said second passage and said stem being complementarily circular in cross section.
Claim 11
Dependent Claim
15 words
In an internal combustion engine according to claim 1, said angle being a right angle.
Claim 12
Dependent Claim
29 words
In an internal combustion engine according to claim 2, said second passage and said stem being complementarily circular in cross section, and means constraining said stem to longitudinal movement.
Claim 13
Dependent Claim
29 words
In an internal combustion engine according to claim 11, said second passage and said stem being complementarily circular in cross section, and means constraining said stem to longitudinal movement.
Claim 14
Dependent Claim
124 words
In an internal combustion engine according to claim 1, the inlet end portion of said housing having an enlarged internal diameter, a unitary plug having including a body portion registering part way in said inlet end portion and an inner extension of smaller diameter than said body portion extending from said body portion thereby providing a circumferential space around said inner extension, a nipple extending from the outer end of said body portion and adapted to have said conduit connected thereto, said plug including a blocking wall at the inner extremity of said inner extension blocking the longitudinal passage through the plug, said inner extension having a plurality of spaced holes through the circumferential wall thereof between said blocking wall and said body portion.
Claim 15
Dependent Claim
217 words
In an internal combustion engine haVing an opening in the downdraft side of the carburetor thereof, a housing having a longitudinal passage therethrough and an inlet and an outlet end, said outlet being connected to said opening, said housing having a second passage extending therethrough at an acute angle to said longitudinal passage and intersecting said longitudinal passage, a stem longitudinally slideable in said second passage having a third passage extending therethrough in the same direction as said longitudinal passage, said longitudinal passage and said third passage having substantially the same cross- sectional area, limit stop means limiting slideable movement of said stem between a first position in which said longitudinal passage and said third passage are in minimum mutual alignment and a second position in which the same are substantially in maximum mutual alignment, said inlet end of said housing being adapted to be connected to a conduit leading from the crankcase of the engine to convey crankcase gases into said opening, and means operatively connected between the accelerator mechanism of the engine and one end of said stem for sliding said stem from said first position toward said second position proportionally as the butterfly valve of the engine is more widely opened, and means on said stem normally urging said stem into said first position.
Claim 16
Dependent Claim
217 words
In an internal combustion engine haVing an opening in the downdraft side of the carburetor thereof, a housing having a longitudinal passage therethrough and an inlet and an outlet end, said outlet being connected to said opening, said housing having a second passage extending therethrough at an acute angle to said longitudinal passage and intersecting said longitudinal passage, a stem longitudinally slideable in said second passage having a third passage extending therethrough in the same direction as said longitudinal passage, said longitudinal passage and said third passage having substantially the same cross- sectional area, limit stop means limiting slideable movement of said stem between a first position in which said longitudinal passage and said third passage are in minimum mutual alignment and a second position in which the same are substantially in maximum mutual alignment, said inlet end of said housing being adapted to be connected to a conduit leading from the crankcase of the engine to convey crankcase gases into said opening, and means operatively connected between the accelerator mechanism of the engine and one end of said stem for sliding said stem from said first position toward said second position proportionally as the butterfly valve of the engine is more widely opened, and means on said stem normally urging said stem into said first position.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |