Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-11-30
2010-06-01
Le, Dang D (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S219000, C310S231000
Reexamination Certificate
active
07728479
ABSTRACT:
In a DC-motor according to the present invention, contact areas of first brushes can be enlarged without enlarging the external diameter of a disk on which a commutator is provided; therefore, the wear resistance of the first brushes can be enhanced while maintaining a good control-response; and at the same time, the axial dimension can be shortened dramatically, so that the DC-motor can be downsized. The first brushes14are radially in contact with the commutator11, and second brushes15are axially in contact with slip rings12that are formed circumferentially inside the commutator11.
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Fujita Youichi
Miyoshi Sotsuo
Oketani Naohiro
Yokoyama Masayuki
Birch Stewart Kolasch & Birch, LLP.
Le Dang D
Mitsubishi Electric Corporation
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