Electricity: motive power systems – Reciprocating or oscillating motor
Reexamination Certificate
2008-03-18
2008-03-18
Duda, Rina (Department: 2837)
Electricity: motive power systems
Reciprocating or oscillating motor
C318S121000, C310S021000, C310S027000
Reexamination Certificate
active
11549157
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.
REFERENCES:
patent: 4990805 (1991-02-01), Zieve
patent: 5025183 (1991-06-01), Fuschetto
patent: 5367277 (1994-11-01), Kaidou
patent: 6874750 (2005-04-01), Muraji
patent: 2-79699 (1990-06-01), None
Duda Rina
Lowe Hauptman & Ham & Berner, LLP
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