Valve actuator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 12, 1985
Grant Date -
N/A
app pub date -
Apr 25, 1983
filing date -
Apr 25, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A valve operator having a piston or diaphragm and connected polygonal piston rod which supplies reciprocable motion to a key or follower which acts within a spiraled slot formed in a coupling member attached to a valve gate to rotate the valve gate to a desired angular position. One embodiment includes means to bias the piston and the valve gate in a desired angular position from closed to open or therebetween.
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Cited Art Landscape
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