US 6,445,104 B1 · Washer pump and motor brush support structure

Abstract

A washer pump motor includes a case having a pair of arcuate walls and a pair of flat walls. A pair of brushes are opposed to a commutator. A lid, which forms part of the case, includes a pair of brush supports for respectively supporting the brushes. Each brush support includes a base plate, which is fixed to the lid, and a plate spring, which detachably engages with the base plate. The plate spring has a retained portion retained by the corresponding base plate and a resilient arm portion to which the corresponding brush is fixed. The resilient arm portion extends from the retained portion and is substantially parallel to the flat walls. This maximizes the length of the resilient arm portion and maintains the performance of the motor. Also, this arrangement permits miniaturization of the motor and facilitates assembly.

Claims9

Dependent claims

A motor brush support structure, wherein the motor includes a case having a detachable lid, an output shaft, and a commutator located on the output shaft, the support structure comprising:

a brush, which is opposed to the commutator;
a resilient member, which urges the brush toward the commutator such that the brush contacts the commutator;
a base, which is attached to the lid, wherein the base includes a retainer for retaining the resilient member;
an engagement structure, which is located between the resilient member and the retainer such that the resilient member is detachably secured to the retainer;
and
an input terminal, which is attached to the lid to supply the brush with electricity, wherein the input terminal is located between the retainer and the commutator.

3 more elements

Dependencies are inferred from the claim text.

Washer pump and motor brush support structure

Life of this patent

Washer pump and motor brush support structure

Life of this patent

Abstract

Claims9