US PATENT SUBCLASS 166 / 86.3
.~.~ Gate type (perpendicular to pipe) valve

Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
86.1  DF  .~ Inner member anchor or seal with valve {3}
86.3.~.~ Gate type (perpendicular to pipe) valve

DEFINITION

Classification: 166/86.3

Gate type (perpendicular to pipe) valve:

(under subclass 86.1) Inner member seal with valve including a flow regulating device movable perpendicular to the pipe, rod, tubing, or wireline.

(1) Note. The gate valve can only moves to the closed position after the inner member has been removed or disconnected.