Valve actuator apparatus
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United States of America Patent
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Apr 8, 2003
Issued Date -
N/A
app pub date -
Nov 29, 2000
filing date -
Nov 30, 1999
priority date (Note) -
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Abstract
A valve actuator includes two parallel tracks in each of which a slider block is disposed to slide with a pivot pin and nut carried between the slider blocks; a valve stem engaging member is provided with an arm terminating in a sleeve in which a pin having an eccentrically shaped central portion is disposed; from each slider block, an arm extends to connect to an end of the pin in the sleeve; a set screw is employed to fix the position of the pin once the angular position of the arms is set to obtain the optimum mechanical advantage.
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