Oil pump assembly

Details Oil pump assembly Oil pump assembly

1983-04-05

1985-09-03

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Plural pump units with individual or relative control

417299, 418102, 418133, 418212, F04B 4908, F04C 200, F04C 1100

Patent

active

045389667

ABSTRACT:
An oil pump assembly comprises a pump body assembly composed of a pair of front and rear pump bodies, the rear pump body housing in a pump housing space a pair of pumps each including a pump cartridge having a rotor supported on a common drive shaft rotatably supported on the front pump body, and a cam ring accommodating the rotor. A single side plate is axially slidably interposed between the pump cartridges. A pressure plate is disposed between one of the pump cartridges remote from the front pump body and a pump discharge pressure chamber defined at the bottom of the pump housing space and communicating with a main passage through which one of the pumps communicates with a discharge port. The other pump is selectively connected by a directional control valve to the main passage. The pump and valve parts can easily be assembled into the pump bodies, and hence the oil pump assembly can be mass-produced efficiently, less costly, and is small in size and lightweight.

REFERENCES:
patent: 2411606 (1946-11-01), Wilson
patent: 2720171 (1955-10-01), Harrington et al.
patent: 3985472 (1976-10-01), Virtue et al.
patent: 4116577 (1978-09-01), Lauck
patent: 4412789 (1983-11-01), Ohe et al.
Japanese Preliminary Patent Publication No. Sho 57-28889, published on Feb. 16, 1982.

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