Vane pump with a throttling groove in the rotor

Details Vane pump with a throttling groove in the rotor Vane pump with a throttling groove in the rotor

1991-10-23

1993-02-23

Bertsch, Richard A.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Grooved working member surface

418 82, 418212, 418268, F04C 200, F04C 230, F04C 232

Patent

active

051885220

ABSTRACT:
A vane pump is disclosed, which comprises a body structure defining a space which has mutually opposed surfaces; a cam ring tightly disposed in the space; a rotor having a plurality of radially extending vane mounting grooves and rotatably disposed in the cam ring having both sides thereof slidably contacting with the opposed surfaces of the body structure; and a plurality of vanes slidably disposed in the vane mounting grooves in such a manner that heads of the vanes slidably contact with an inner surface of the cam ring. In the invention, the rotor is formed at at least one side thereof with a throttle groove to which bottom portions of the vane mounting grooves are exposed.

REFERENCES:
patent: 3399826 (1968-09-01), Andriulis
patent: 4507065 (1985-03-01), Shibuya et al.
patent: 4795325 (1989-01-01), Kishi et al.

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