Linear solenoid
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United States of America Patent
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Jan 9, 2018
Grant Date -
Aug 11, 2016
app pub date -
Feb 5, 2016
filing date -
Feb 10, 2015
priority date (Note) -
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Abstract
A linear solenoid has a coil, a plunger, a magnetic attractive core, and a magnetic delivery core. The coil generates a magnetic force when being energized. The plunger is supported to be movable in an axial direction on an inner side of the coil. The magnetic attractive core magnetically attracts the plunger in the axial direction by the magnetic force generated by the coil. The magnetic delivery core delivers a magnetic flux to an outer surface of the plunger. A shaft that is non-magnetic and extends in the axial direction is fixed on the inner side of the coil. The plunger has a shaft hole defined around an axial center of the plunger, and the shaft is inserted in the shaft hole. The plunger slides while being in contact with the shaft. One end of the shaft is fixed to the magnetically attractive core.
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