Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1991-04-30
1992-09-22
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
251267, 251305, F16K 122
Patent
active
051488310
ABSTRACT:
The present invention is a shaftless bi-directional butterfly valve that does not require a valve housing and may be mounted to a length of pipe by merely drilling a hole into the wall of the pipe. A stuffing box is attached to a pipe by a U-bolt or other conventional means. The stuffing box serves as a drill jig to center the hole that must be drilled in the pipe. A threaded rotatable stem is arranged to penetrate one side of a pipe perpendicularly to the axis thereof. In the interior of the pipe, the stem is threaded into a stem nut which travels along the length of the stem as the stem rotates. Its travel is limited by a stop pin which is located at the extremity of the stem in the interior of the pipe. Two elliptical discs are attached to the stem nut, each by a separate hinge pin protrusion, at points which are diametrically opposite. The valve is closed and opened by rotating the stem nut along the threaded rotatable stem, which in turn forces each of the two discs to pivot about the stem nut and also about the center of the pipe.
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Barnard Ralph R.
Chambers A. Michael
Kennedy Manufacturing, Inc.
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