US3766898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase ventilation valve
Assignee: Motors Liquidation Co
•
Filing: 1971-10-21
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Granted: 1973-10-23
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Expires: 1991-10-21
Abstract
Abstract A crankcase ventilation valve for an internal combustion engine has an undercut portion of the plunger body which acts as a deposit storage area for adherent deposits scraped from the flow control portion of the plunger body through its reciprocating movement in the flow control orifice. The undercut portion is located on the plunger body so that the closest end thereof enters but does not pass through the flow control orifice when the plunger is in its extreme position against its stop. In this way positive scraping of deposits into the storage area is assured without substantial effect on the valve flow curve being caused by the presence of the undercut storage area.
Inventors
- 👤 Mullen W Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:09
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02; F02F; F02F7/00; F02F7/006; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
A flow control valve for use with an internal combustion engine to control the flow of blow-by gases or the like to the engine induction system, said valve comprising a housing defining a fluid flow path and having a flow control orifice in said flow path, a valve plunger within said housing, said plunger having an elongated body including a flow control portion of variable cross sectional area longitudinally thereof, which is reciprocably movable within said orifice in response to pressure differentials across the valve plunger to control fluid flow through the orifice, and stop means in the housing and engagable by the valve plunger only at one predetermined position thereof to stop movement of the valve plunger in one direction at said predetermined position within said orifice, said valve plunger body having an undercut portion adjacent the flow control portion, said undercut portion being positioned so that one end thereof extends into but does not pass through the orifice when said valve plunger is against said stop means, whereby said undercut portion forms a storage volume for adherent deposits scraped from the surface of the plunger body flow control portion during its movement within the orifice.
Claim 2
Dependent Claim
197 words
A flow control valve for use with an internal combustion engine to control the flow of blow-by gases or the like to the engine induction system, said valve comprising a housing defining a fluid flow path and having a flow control orifice in said flow path, a valve plunger within said housing, said plunger having an elongated body including a flow control portion of variable cross sectional area longitudinally thereof, which is reciprocably movable within said orifice in response to pressure differentials across the valve plunger to control fluid flow through the orifice, and stop means in the housing and engagable by the valve plunger only at one predetermined position thereof to stop movement of the valve plunger in one direction at said predetermined position within said orifice, said valve plunger body having an undercut portion adjacent the flow control portion, said undercut portion being positioned so that one end thereof extends into but does not pass through the orifice when said valve plunger is against said stop means, whereby said undercut portion forms a storage volume for adherent deposits scraped from the surface of the plunger body flow control portion during its movement within the orifice.
Claim 3
Dependent Claim
165 words
A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having an orifice therein to restrict fluid flow therethrough, a valve element in said housing and having an elongated body portion and a head at one end thereof, said body portion including a deposit collection portion adjacent the head and a generally tapering flow control portion on the end opposite the head, and stop means in the housing and engagable by the head only at one predetermined position of the valve element to prevent movement of the valve element beyond said predetermined position in one direction, said deposit collection portion being formed by a substantial undercut of the elongated portion, said deposit collection portion extending from adjacent the head to a point on the body portion which enters but does not pass through the orifice when the head moves into engagement with the stop means.
Claim 4
Dependent Claim
165 words
A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having an orifice therein to restrict fluid flow therethrough, a valve element in said housing and having an elongated body portion and a head at one end thereof, said body portion including a deposit collection portion adjacent the head and a generally tapering flow control portion on the end opposite the head, and stop means in the housing and engagable by the head only at one predetermined position of the valve element to prevent movement of the valve element beyond said predetermined position in one direction, said deposit collection portion being formed by a substantial undercut of the elongated portion, said deposit collection portion extending from adjacent the head to a point on the body portion which enters but does not pass through the orifice when the head moves into engagement with the stop means.
Claim 5
Dependent Claim
190 words
A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having a fluid flow control orifice therein, a valve plunger reciprocably carried in said housing and having an elongated body portion and a head at one end thereof, said body portion including a sharp-edged undercut forming a deposit collection portion adjacent the head and a generally tapered flow control portion having a larger diameter, ending immediately adjacent the deposit collection portion, and a smaller diameter at its end opposite from the head, said flow control portion being free to rub the edges of said orifice during reciprocation therein, stop means in the housing and engagable by the head in only one predetermined position of the plunger to prevent movement of the plunger in one direction beyond said predetermined position wherein the end of said larger diameter portion adjacent said undercut is within said orifice to provide a maximum flow restriction, and spring means in sAid housing and biasing said plunger in a flow increasing direction away from said stop means.
Claim 6
Dependent Claim
190 words
A crankcase ventilation valve for use with an internal combustion engine to control the flow of blow-by gases and vapors into the engine induction system, said valve comprising a housing having a fluid flow control orifice therein, a valve plunger reciprocably carried in said housing and having an elongated body portion and a head at one end thereof, said body portion including a sharp-edged undercut forming a deposit collection portion adjacent the head and a generally tapered flow control portion having a larger diameter, ending immediately adjacent the deposit collection portion, and a smaller diameter at its end opposite from the head, said flow control portion being free to rub the edges of said orifice during reciprocation therein, stop means in the housing and engagable by the head in only one predetermined position of the plunger to prevent movement of the plunger in one direction beyond said predetermined position wherein the end of said larger diameter portion adjacent said undercut is within said orifice to provide a maximum flow restriction, and spring means in sAid housing and biasing said plunger in a flow increasing direction away from said stop means.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |