Rotary internal gear pump having teeth with asymmetrical trailin

Details Rotary internal gear pump having teeth with asymmetrical trailin Rotary internal gear pump having teeth with asymmetrical trailin

1990-07-02

1992-05-19

Vrablik, John J.

Rotary expansible chamber devices

Moving cylinder

Rotating

418190, F04C 210

Patent

active

051143259

ABSTRACT:
A trochoid type gear pump features an outer rotor formed with internal teeth and an inner rotor formed with external teeth which can be receivable in the external ones. The profiles of one or both of the internal and external teeth are rendered asymmetric and arranged to engage only in the region of an intake opening formed in the casing in which the two rotors are housed.

REFERENCES:
patent: 2389728 (1945-11-01), Hill
patent: 2434135 (1948-01-01), Witchger
patent: 2830542 (1958-04-01), Erickson et al.
patent: 3536426 (1970-10-01), Albrecht et al.
patent: 4155686 (1979-05-01), Eisenmann et al.
Hill, Kinematics of Gerotors, The Peter Reilly Co, Philadelphia, 1927, pp. 29-30, copy in 418-171.

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