Patent ID: 6339272
Filing Date: 2002-01-15
Classification: H01R,H02K

Abstract:
A pump comprising:a housing, which includes a motor chamber, wherein the housing includes a drain structure for connecting the motor chamber to the exterior of the housing, wherein the drain structure is arranged to guide a liquid from the motor chamber to the exterior of the housing, and wherein the drain structure includes passages that extend in at least two different directions; an impeller, which draws in and pumps out a liquid; and a motor, which is accommodated in the motor chamber to drive the impeller, the motor including: a case, which has a flat wall located inward of an imaginary circle circumscribing the case, wherein the drain structure is radially aligned with the flat wall such that at least part of the drain structure is located inward of the imaginary circle; an output shaft, which is coupled to the impeller; a commutator, which is located on the output shaft; 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, wherein the resilient member includes a fixed portion supported by the case and a resilient arm portion to which the brush is fixed, wherein the resilient arm portion extends from the fixed portion such that the resilient arm portion is substantially perpendicular to the output shaft and is substantially parallel to the flat wall; and an input terminal, which is attached to the case to supply the brush with external electricity, wherein the input terminal is located between the fixed portion and the commutator.