Compound gear pumps and engine hydraulic circuits using same

Details Compound gear pumps and engine hydraulic circuits using same Compound gear pumps and engine hydraulic circuits using same

1998-02-13

2000-04-04

Freay, Charles G.

Pumps

Successive stages

With interstage discharge or additional discharge from...

417310, 418 3, 123 9017, F01C 130

Patent

active

060453389

ABSTRACT:
A compound gear pump includes an internal gear pump including an outer rotor having on the outer periphery external teeth, an external gear pump including a rotor having on the outer periphery an external teeth circumscribed with the external teeth of the outer rotor, and a guide face arranged on the outer periphery of the outer rotor and being adjacent to the external teeth of the outer rotor in the axial direction thereof.

REFERENCES:
patent: 3238738 (1966-03-01), Webber et al.
patent: 4597726 (1986-07-01), Soderlund et al.
patent: 5586875 (1996-12-01), Ondrejko et al.
patent: 5669343 (1997-09-01), Adachi

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