Patent attributes
A variable displacement vane pump includes a first body, a second body, an adapter ring, a cam ring, and a rotor. The first body includes a cylinder portion, and a base portion covering a first longitudinal end of an inner space of the cylinder portion. The second body covers a second longitudinal end of the inner space of the first body. The adapter ring has an outer radial periphery fitted and fixed to an inner radial periphery of the cylinder portion of the first body. The cam ring is mounted inside the adapter ring and supported by the adapter ring for lateral motion in contact with the contact area of the adapter ring. The rotor is mounted inside the cam ring. The adapter ring has a radial thickness that gradually increases when followed longitudinally of the adapter ring from the base portion of the first body toward the second body.
