Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2009-09-10
2010-12-07
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S235000
Reexamination Certificate
active
07847467
ABSTRACT:
An electric rotary machine which may be employed as a dc motor in an automotive engine starter. The motor includes an armature equipped with an armature shaft, a commutator, brushes, and a bearing retaining an end of the armature shaft. The surface of the commutator has a plurality of protrusions extending in parallel to each other in a direction of rotation of the commutator. Each of the brushes has formed in the bottom thereof grooves in which the protrusions of the commutator are fit. The brushes are urged into constant engagement of the grooves with the protrusions on the commutator to establish electrical contacts between the brushes and the commutator and minimize movement of the armature shaft relative to the bearing.
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Denso Corporation
Desai Naishadh N
Leung Quyen
Oliff & Berridg,e PLC
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