Gerotor pump having inlet and outlet relief ports

Details Gerotor pump having inlet and outlet relief ports Gerotor pump having inlet and outlet relief ports

1996-12-02

1998-03-31

Vrablik, John J.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Working fluid portion fills intertooth spaces or spaces...

418171, 418189, F04C 210

Patent

active

057331111

ABSTRACT:
A gerotor pump includes a pair of relief ports superimposed on and directly communicating with the pump's inlet and outlet channels, respectively. The relief ports simultaneously communicate with an open mesh pumping chamber so as to provide an intermittent controlled leak from the open mesh pumping chamber. Upon rotation of the gear members of the gerotor pump when the volume in the open mesh pumping chamber is increasing to a maximum volume, fluid in the open mesh pumping chamber vents into the relief port superimposed on and communicating with the outlet channel while continuing to communicate with the relief port superimposed on and communicating with the inlet channel. Upon further rotation of the gear member when the volume in the open mesh pumping is decreasing, fluid in the open mesh pumping chamber is prevented from venting into the relief port superimposed and communicating with the inlet channel while continuing to communicate with the relief port superimposed on and communicating with the outlet channel. Thus, fluid over-pressure in an excessive fluid leakage from the open mesh pumping chamber is limited.

REFERENCES:
patent: 1129090 (1915-02-01), Hawley
patent: 2870720 (1959-01-01), Lorenz
patent: 2884864 (1959-05-01), Bobnar
patent: 2990783 (1961-07-01), Oliver
patent: 3034448 (1962-05-01), Brundage
patent: 3130682 (1964-04-01), Meads
patent: 3267862 (1966-08-01), Mosbacher
patent: 3303792 (1967-02-01), Littlewood
patent: 3995978 (1976-12-01), Khan et al.
patent: 4008018 (1977-02-01), McDermott
patent: 4290739 (1981-09-01), Korse
patent: 4767296 (1988-08-01), Satomoto et al.

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