Motor

Details Motor Motor

2007-05-29

2007-05-29

Bruce, David (Department: 2809)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S181000

Reexamination Certificate

active

11215231

ABSTRACT:
A stepping motor includes a hollow cylindrical fixed yoke; a magnet disposed coaxially with the fixed yoke and divided into sections in the circumferential direction, the sections being alternately magnetized; a first coil and a second coil coaxially fixed to the fixed yoke; a first rotational yoke facing a magnetized surface of the magnet and excited by the first coil; a second rotational yoke facing the magnetized surface of the magnet and excited by the second coil; and bearing units formed in bobbins for supporting a rotor including the first rotational yoke, a connecting member, and the second rotational yoke such that the rotor is rotatable with respect to the fixed yoke.

REFERENCES:
patent: 4206374 (1980-06-01), Goddijn
patent: 4306164 (1981-12-01), Itoh et al.
patent: 4899072 (1990-02-01), Ohta
patent: 5831356 (1998-11-01), Aoshima
patent: 09-331666 (1997-12-01), None
patent: 2002-51526 (2002-02-01), None

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