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US 2002/0001528 A1Published application
Pump motor for vehicle
AssigneeMitsuba Corporation
InventorsHirokazu Shoda, Masakatsu Kimura
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AssigneeMitsuba Corporation
InventorsHirokazu Shoda, Masakatsu Kimura
Estimating the term…
The invention relates to a pump motor for a vehicle, wherein when integrally forming the housing of a motor pump, in which the pump accommodating portion is made larger in diameter than the motor accommodating portion, by using metal dies, ventilation holes that communicate from the base end side of the housing to the motor accommodating portion are formed without making the motor accommodating portion of the housing larger in diameter, wherein projections are formed so as to be continuous to the base end side at the portion opposed to the pump accommodating portion on the outer circumferential surface of the housing, and the ventilation holes are formed to incline inwardly so that they reach from the base end side of the projections to the inside of the motor accommodating portion.
A pump motor 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.
Dependencies are inferred from the claim text.