Integrated magnetostrictive linear displacement transducer and limit switch for an actuator
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United States of America Patent
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Apr 7, 2015
Grant Date -
Nov 26, 2009
app pub date -
May 12, 2009
filing date -
May 26, 2008
priority date (Note) -
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Abstract
The present invention relates to a position sensor and limit switch apparatus for an actuator. The actuator has a cylinder and a piston with at least one magnetized portion reciprocatingly disposed within the cylinder. The apparatus includes an elongate housing aligned parallel with the cylinder. A magnetostrictive linear displacement transducer is disposed within the housing for sensing the position of the at least one magnetized portion. The apparatus includes a switch means responsive to the transducer for operatively interrupting actuation of the piston upon the at least one magnetized portion reaching a limit position.
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