Variable displacement vane pump and method of manufacturing...

Details Variable displacement vane pump and method of manufacturing... Variable displacement vane pump and method of manufacturing...

2007-10-23

2010-11-16

Denion, Thomas E (Department: 3748)

Rotary expansible chamber devices

With changeable working chamber magnitude

Cylinder or cylinder portion moved linearly and radially

C418S030000, C417S220000, C029S888025

Reexamination Certificate

active

07832995

ABSTRACT:
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.

REFERENCES:
patent: 6382925 (2002-05-01), Oba et al.
patent: 6976830 (2005-12-01), Uchino
patent: 7128542 (2006-10-01), Suzuki et al.
patent: 7-119648 (1995-05-01), None

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