Actuator
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United States of America Patent
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May 24, 2016
Grant Date -
Aug 28, 2014
app pub date -
Oct 19, 2012
filing date -
Oct 21, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An actuator, including a cylinder, an actuator piston displacably arranged in the cylinder, a pressure fluid circuit having a channel mouthing in the cylinder, an indirectly electrically controlled first valve body, arranged in the channel for controlling a flow of a pressure fluid in the channel, and a second valve body, arranged in or at the channel to open and close the channel, the second valve body being a member fixedly connected to the actuator piston, and the first valve body and the second valve body being arranged in series with each other in the channel. The actuator further includes an electrically controlled three-way valve that is arranged to alternately open for a pressure fluid flow from a high pressure source and a pressure fluid flow from a low pressure source, chosen pressure fluid flow being arranged to act against and admit displacement of the first valve body.
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