Patent attributes
A vane pump comprising a housing, a rotor and a vane is provided. The housing comprises a pump room having an approximately circular inner wall. The rotor rotates at an eccentric position relative to a center of the pump room and slides in contact with a part of the inner wall of the pump room. The vane is rotated by the rotor, for dividing the pump room into a plurality of spaces full-time. 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 the other space are formed, respectively. An oil supply passage is formed in the rotor and the housing. A lubricating oil is intermittently fed through a communicating hole of the oil supply passage.
