Valve actuators
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United States of America Patent
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May 10, 2016
Grant Date -
Apr 23, 2015
app pub date -
Nov 27, 2012
filing date -
Nov 28, 2011
priority date (Note) -
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Abstract
A valve actuator having a drive shaft, which, in use, is configured to adjust a valve between an open position and a closed position, an AC induction motor for driving the drive shaft a contactless position sensor configured to, in use, output a signal representing an angular position of the drive shaft or the valve, and a controller configured to control the AC motor in accordance with the signal output by position sensor.
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