Dynamo-electric machine and vehicular air blower having the...

Details Dynamo-electric machine and vehicular air blower having the... Dynamo-electric machine and vehicular air blower having the...

2006-10-31

2009-06-30

Leung, Quyen P (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S245000, C310S242000

Reexamination Certificate

active

07554239

ABSTRACT:
Each brush box, which receives a corresponding brush, has a contact wall. The contact wall becomes deformable when the temperature of the contact wall reaches a predetermined temperature. A radially outer end surface of the brush is tilted relative to the contact wall, so that the brush is urged against the contact wall by a compression coil spring, which urges the brush against a commutator of an armature. Upon energization of the armature, when the temperature of the brush reaches a predetermined temperature, an urging force of the spring, which is conducted to the contact wall through the brush, causes deformation of the contact wall to disengage a radially inner end of the brush from the commutator.

REFERENCES:
patent: 5717271 (1998-02-01), Aoki et al.
patent: 6922003 (2005-07-01), Uchida
patent: 7067946 (2006-06-01), Noda et al.
patent: 2004/0164643 (2004-08-01), Ortt et al.
patent: 2006/0192449 (2006-08-01), Noda et al.
patent: 406315251 (1994-11-01), None

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