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US 4,785,210 AGranted
Linear motor
AssigneeSony Corporation
InventorsShigehisa Maruyama, Hideo Niikura
Life of this patent
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Abstract
The present invention is concerned with a linear motor adapted to produce a thrust in a linear direction, wherein the magnetic fluxes produced by coils of a stationary part are passed through a closed magnetic circuit including a gap of a movable part for lowering the power consumption and the manufacture costs while also reducing the size and weight of the motor.
Claims11
A linear motor, comprising:
- first yoke means including a pair of magnetic yokes having a gap separating a first of said yokes from a second of said yokes;
- second yoke means slidably coupled to said first yoke means;
- permanent magnet means for generating magnetic fluxes passing through said first and second yoke means;
- and
- coil means secured to said second yoke means for generating control magnetic fluxes for determining the relative position of said first yoke means and second yoke means.
2 more elements
Dependencies are inferred from the claim text.