Block and bleed valve
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United States of America Patent
Stats
-
Dec 8, 1992
Grant Date -
N/A
app pub date -
Nov 8, 1991
filing date -
Nov 8, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve for use with a first working fluid conduit and a second working fluid conduit, the valve includes a valve body with a valve bore formed therein. A piston is slidably disposed within the valve body. There is a first opening and a second opening formed within and defined by the valve body. The first opening is in communication with the first working fluid conduit and the second opening is in communication with the second working fluid conduit. Displacement of the piston in a first direction to a first position results in restriction of working fluid passage through the second working fluid conduit. Displacement of the piston in a second direction, opposed to the first direction, to a second position results in restriction of working fluid passage through the first working fluid conduit. There is a spring which biases the piston into the second position. There is also a variable displacing fluid pressure actuation device capable of overcoming the bias of the spring for displacing the piston into the first position.
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