Patent ID: 7156623

Claim:
An electric oil pump apparatus comprising: a pump housing having a suction port for inhaling oil and a discharging port for discharging the oil, the pump housing comprising an axially extending projecting portion possessing an outer surface; a motor housing comprising an opening possessing an inner surface; a shaft possessing one end and an other end, the one end of the shaft extending in the pump housing and provided with a drive rotor capable of feeding the oil in response to rotation of the shaft, and the other end of the shaft extending in the motor housing and provided with a permanent magnet; the shaft being supported by a bearing portion located on one side of the drive rotor between the drive rotor and the permanent magnet and being unsupported on an opposite side of the drive rotor; the axially extending projecting portion of the pump housing having the bearing portion and being positioned in the opening in the motor housing so that the outer surface of the axially extending projecting portion is engaged with the inner surface of the opening in the motor housing; and an electromagnetic coil fixed to the motor housing at a position with a predetermined distance from the permanent magnet in a radially outward direction of the shaft and capable of rotating the shaft by controlling exciting operation applied to the electromagnetic coil.