Helical gear pump and stator with constant rubber wall thickness

Details Helical gear pump and stator with constant rubber wall thickness Helical gear pump and stator with constant rubber wall thickness

1991-05-31

1992-09-08

Vrablik, John J.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

418153, 418178, F04C 2107, F04C 500

Patent

active

051453436

ABSTRACT:
A helical gear pump having a stator in which the wall thickness of the stator is substantially constant. This reduces heating in dry running conditions and this effect can be improved by providing anti-friction surfaces on both the rotor and stator.

REFERENCES:
patent: 2527673 (1950-10-01), Byram
patent: 3499389 (1970-03-01), Seeberger et al.
patent: 3612734 (1971-10-01), Dawson et al.
patent: 4863359 (1989-09-01), Unterstrasser
patent: 4948432 (1990-08-01), Leach

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