Patent ID: 6524085
Filing Date: 2003-02-25
Classification: F04D

Abstract:
A pump for a vehicle accommodated in a housing in which a motor chamber supporting a motor shaft is formed at the tip end side thereof and a pump chamber is formed at the base end side thereof via a partitioning wall, said pump motor comprising at least one ventilation hole for communicating the interior of said motor chamber with the exterior thereof for venting so that said ventilation hole bypasses said pump chamber from the base end side of said housing to said motor chamber, wherein said ventilation hole is formed by communicating an outer hole opened to the base end side of said housing with an inner hole that is located closer to an axial center of said motor shaft than said outer hole and is opened to the interior of said motor chamber, wherein said ventilation hole is formed so as to incline and reach from the base end side of at least one projection, which is formed opposite to said pump chamber so as to protrude from the outer circumferential surface of said housing, to the interior of said motor chamber.