Stroke detection device
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United States of America Patent
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Oct 16, 2018
Grant Date -
Jun 1, 2017
app pub date -
Jun 30, 2014
filing date -
Jun 30, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A stroke detection device for detecting, along a longitudinal direction, a stroke amount of a spool arranged in a valve main body. The stroke detection device includes: a device main body attached to the valve main body; a detection rod extending along the longitudinal direction of the spool, and movably arranged along the longitudinal direction inside the device main body, in a position where a tip end portion faces an end surface of the spool; a stroke detection unit configured to output a detection signal according to the stroke amount of the detection rod with respect to the device main body; and an attracting unit arranged in the tip end portion of the detection rod, the attracting unit being attracted to the end surface of the spool by magnetic force.
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