Drive apparatus

Details Drive apparatus Drive apparatus

2007-06-22

2009-12-01

Nguyen, Tran N (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156390

Reexamination Certificate

active

07626291

ABSTRACT:
A drive apparatus having a shortened axial dimension. First and second magnets are each formed into a semi-cylindrical shape and each provided with a magnetized pattern portion. A rotor yoke includes a shaft portion and a magnetic pole portion facing magnetized surfaces of the magnets. First and second stator yokes are each disposed to cooperate with the rotor yoke to sandwich therebetween a part of the first or second magnet where the magnetized pattern portion is formed. First and second coils each magnetize a part of the magnetic pole portion of the rotor yoke which faces the first or second stator yoke.

REFERENCES:
patent: 3479539 (1969-11-01), Brion
patent: 4767958 (1988-08-01), Sasaki
patent: 5925945 (1999-07-01), Aoshima
patent: 6172440 (2001-01-01), Sasaki et al.
patent: 6876109 (2005-04-01), Matsushita et al.
patent: 7173352 (2007-02-01), Aoshima
patent: 09-331666 (1997-12-01), None
patent: 2002-051526 (2002-02-01), None
patent: 2005-204453 (2005-07-01), None

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