Valves and valve actuation – Mechanical movement actuator – Screw
Reexamination Certificate
2007-01-16
2009-08-25
Bastianelli, John (Department: 3753)
Valves and valve actuation
Mechanical movement actuator
Screw
C251S327000, C251S329000
Reexamination Certificate
active
07578496
ABSTRACT:
A valve arrangement includes a valve body defining an enclosure, having a bonnet connected to the valve body. A stem is rotatably attached to the valve body and positioned at least partially within the valve body. A handle is in operable communication with the stem and configured to rotate the stem. An actuation portion is positioned distal from the handle and in direct or indirect contact with the stem, wherein the actuation portion is configured to move when the stem is rotated. The stem includes a first thread portion and a second thread portion, the first thread portion having a first thread pitch and configured to interact with and move the actuation portion. The second thread portion is in communication with the bonnet having a second thread pitch and configured to move the stem with respect to the body. The second thread pitch is smaller than the first thread pitch.
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Gustafson Gary M.
Heelan, Jr. Raymond V.
Allegheny Valve and Coupling, Inc.
Bastianelli John
The Webb Law Firm P.C.
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