Motor-driven tool

Details Motor-driven tool Motor-driven tool

2008-01-29

2008-01-29

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S049540, C310S047000, C310S239000, C310S242000, C310S071000, C310S043000

Reexamination Certificate

active

10634814

ABSTRACT:
In a motor-driven tool, a carbon brush part8is arranged between a suction port6and a commutator11of the motor and includes a cylindrical side wall8a. The cylindrical side wall8alocated on an outer periphery of the commutator11is provided with a tapered portion8bwhich grows wider toward the commutator11and grows narrower toward a coil end10of the armature. Between the carbon brush part8and the coil end10, there is provided a heat radiating plate4made of metal and adapted to be engaged with the carbon brush part8.

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