Patent ID: 7671507

Claim:
A brush bag for a current transfer unit of a dynamo-electric machine comprising a commutator, especially for an electric motor, wherein the brush bag, which is especially made of metal, has guiding areas for guiding a brush which is displaceable with respect to a longitudinal extension, which is especially embodied as a multi-layer carbon brush, and a spacing is provided between the guiding areas and the brush transverse to the longitudinal extension of the brush, wherein in a front guiding area of the brush bag facing the commutator, a first distance in at least one longitudinal extension located transverse to the brush is shorter than a second distance in a rear guiding area of the brush bag facing away from the commutator, wherein the front guiding area of the brush bag facing the commutator is in a first plane that lies at a first end of the brush bag facing the commutator, and wherein the rear guiding area of the brush bag facing away from the commutator is in a second plane that lies at a second end of the brush bag away from the commutator.