Back to results
US 4,044,996 AGranted
Valve means
OwnerHeiichi Kodairainventor
Life of this patent
Estimating the term…
Abstract
A valve means comprising a valve lever pivotably supported by a valve guide and having a valve disk at one end thereof, a flexible seal covering the supporting portion of the valve guide and supporting the valve lever, and a cam mechanism, said valve means being arranged to open and close the valve instantaneously by an extremely weak force by operating the valve lever by means of the cam mechanism.
Claims8
A valve means comprising:
- a valve lever pivotably supported by a valve guide and having a valve disk at one end thereof,
- a seal of flexible material sealing the supporting portion of said valve guide and supporting said valve lever;
- said seal being formed integral with said valve disk and covering a portion of said valve lever, and
- a cam mechanism comprising:
- a first cam having a cam surface of a high portion and low portion;
- a second cam rotatable integrally with said first cam and having
- a cam surface formed as a curved surface;
- the distance of said curved surface from the center of rotation of said second cam being varied gradually from the highest portion toward the lowest portion of said cam surface;
- a first lever pivotably supported by a shaft and biased so that one end thereof is pushed against said cam surface of said first cam, and
- a second lever pivotably supported by another shaft and biased so that one end thereof is pushed against said cam surface of said second cam;
- said valve means being arranged to integrally rotate both of said first and second cams so that said valve disk is opened when said one end of said first lever drops from said high portion to said low portion of said first cam as the other end of said first lever operates said valve lever and that said valve disk is closed when said one end of said second lever drops from said highest portion to said lowest portion of said second cam as said second lever pushes said first lever to return said first lever to the original position;
- said seal being deformed when said valve lever is operated.
9 more elements
A valve means comprising:
- a valve lever pivotably supported by a valve guide and having a valve disk at one end thereof,
- a seal of flexible material sealing the supporting portion of said valve guide and supporting said valve lever,
- said seal being deformed when said valve lever is operated, and
- a cam mechanism for operating said valve lever, comprising:
- a first cam having a cam surface consisting of a high portion and low portion,
- a second cam rotatable integrally with said first cam and having a cam surface formed as a curved surface,
- the distance of said curved surface from the center of rotation of said second cam being varied gradually from the highest portion toward the lowest portion of said cam surface,
- a first lever pivotably supported by a shaft a biased so that one end thereof is pushed against said cam surface of said first cam, and
- a second lever pivotably supported by another shaft and biased so that one end thereof is pushed against said cam surface of said second cam,
- said valve means being arranged to integrally rotate both of said first and second cams,
- so that said valve disk is opened when said one end of said first lever drops from said high portion to said low portion of said first cam as the other end of said first lever operates said valve lever, and
- that said valve disk is closed when said one end of said second lever drops from said highest portion to said lowest portion of said second cam as said second lever pushes said first lever to return said first lever to the original position.
9 more elements
Dependencies are inferred from the claim text.