Gear pump or motor with tooth tips of dissimilar metal

Details Gear pump or motor with tooth tips of dissimilar metal Gear pump or motor with tooth tips of dissimilar metal

1986-03-25

1987-07-28

Vrablik, John J.

Rotary expansible chamber devices

With wear surface treatment or integrally plated wear layer

418179, 418206, F03C 208, F04C 218

Patent

active

046829393

ABSTRACT:
A gear pump and motor is provided having increased life and efficiency as a result of improved wiping action of the gear teeth on the inner periphery of the pump chamber. This is accomplished by providing a non-smooth surface layer of a dissimilar metal such as a carbide on the tip ends of the teeth.

REFERENCES:
patent: 2491677 (1949-12-01), McCulloch
patent: 3483825 (1969-12-01), Difford et al.
patent: 3544244 (1970-12-01), Haupt
patent: 3878880 (1975-04-01), Jones
patent: 3886637 (1975-06-01), Ellis et al.

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