Patent ID: 7588433

Claim:
A vane pump comprising: a housing having a pump room, the pump room having an approximately circular inner wall; a rotor rotating at an eccentric position relative to a center of the pump room and sliding in contact with a part of the inner wall of the pump room; and a vane rotated by the rotor, for dividing the pump room into a plurality of spaces full-time, wherein in the housing, among spaces divided by a center line drawn between the center of the pump room and a center of rotation of the rotor, an intake passage in one space and an exhaust passage in another space are formed, respectively, an oil supply passage intermittently communicating with the pump room owing to the rotation of the rotor is formed in the rotor and the housing, a lubricating oil is intermittently fed through a communicating hole of the oil supply passage formed in the pump room, the communicating hole being formed in a space on a side of the exhaust passage from a center line in the pump room and being formed at a back side from a position at which the exhaust passage is formed, the back side being seen from an upstream side in a rotational direction of the vane, and the vane passes the communicating hole at the same time when the oil supply passage and the pump room are adapted to communicate with each other.