Patent ID: 7284969
Filing Date: 2007-10-23
Classification: F04D

Abstract:
1. A washer pump comprising: a case which is partitioned into a motor chamber and a pump chamber by a partition wall at one end of a cylindrical pump case; an armature accommodated in the motor chamber, the armature having an armature shaft rotatable when the armature is electrically energized; an impeller accommodated in the pump chamber and coupled to the armature shaft so as to be rotatable; a liquid suction port in a circumferential wall of said cylindrical pump case and communicating with the pump chamber from which washing liquid is sucked into the pump chamber by a rotation of the impeller; and a filter detachably attached in the liquid suction port for filtering the washing liquid, wherein a ventilation hole is formed in said partition wall between the pump chamber and the liquid suction port, so that an air passage communicating with the ventilation hole is provided in the filter.