Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mutsuo Hirano0
Date of Patent
March 18, 2008
0Patent Application Number
115491570
Date Filed
October 13, 2006
0Patent Primary Examiner
Patent abstract
In an electromagnetic driver according to the invention, electromagnetic units are arranged in the axial direction of a shaft, and a power supply change-over device is so formed that, when an attractive magnetic field arises between the coil unit and the magnetic unit of the one of the electromagnetic units, a repulsive magnetic field is generated between the coil unit and the magnet unit of the other of the electromagnetic units. As the polarity is alternately changed over by the power supply change-over device when a direct current is supplied to the exciting coils of the electromagnetic units, the coil unit or the magnetic unit reciprocates, and further the shaft reciprocates in the axial direction.
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