Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1983-12-19
1985-10-15
Schwadron, Martin P.
Fluid handling
Line condition change responsive valves
Direct response valves
1375278, F16K 1503
Patent
active
045467927
ABSTRACT:
This invention relates to a check valve having a straight-through flow passage wherein a ball-plug of a cylindrical geometry with a hemispherical end is pendulously confined in a cavity included in the valve body. The ball-plug has a through-hole with the central axis substantially passing through the center of a spherical surface including the hemispherical end of the ball-plug, which central axis substantially intersects the central axis of the ball-plug in an oblique angle. The ball-plug is pendulously confined in the cavity within the valve body by a trunnion in such a way that the ball plug is allowed to swing on a plane including the central axis of the flow passage of the check valve passing through the cavity confining the ball plug and the central axis of the ball plug. At one extreme position in the swinging movement, the through-hole included in the ball plug lines-up with the flow passage allowing straight-through flow for the fluid from one extremity to the other extremity of the check valve. At the other extreme position in the swinging movement a portion of the hemispherical end of the ball-plug adjacent to the wall of the through-hole plugs up the flow pass.
REFERENCES:
patent: 3610163 (1971-10-01), Edwards et al.
patent: 4150811 (1979-04-01), Condit
patent: 4230150 (1980-10-01), Scaramucci
patent: 4258925 (1981-03-01), Guyton
patent: 4433702 (1984-02-01), Baker
Lew Hyok S.
Stranahan Michael
Schwadron Martin P.
Shay James R.
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