ACTUATOR WITH DUAL DRIVE
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United States of America Patent
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app pub date -
Mar 5, 2013
filing date -
Oct 17, 2012
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Abstract
A manually operated actuator is provided with an over-travel feature. The over-travel feature may be realized with a controlled thread backlash or with a biasing member such as a Belleville spring. When used with a flow control device such as a diaphragm valve, the over-travel feature allows the valve to open and close at actuator positions other than full stop positions. Embodiments for manual actuators and hybrid actuators are presented.
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