Vane type positive displacement pump having multiple pump units

Details Vane type positive displacement pump having multiple pump units Vane type positive displacement pump having multiple pump units

1990-01-19

1991-08-06

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418178, 418213, 418255, F04C 2344, F04C 1100

Patent

active

050372831

ABSTRACT:
Vane type positive displacement pump includes three separate vane type pump units on a single shaft, with spacers between the middle pump unit and both end pump units for axially positioning the pump vanes for the middle pump unit at both ends and axially positioning the pump vanes for the two end pump units at one end. The shaft has reduced diameter journal portions adjacent opposite ends of the barrel portion for the middle pump unit on which the spacers are mounted. Also, the outer diameter of the barrel portions for the two end pump units corresponds to the outer diameter of the journal portions for the spacers. At the other end of the end pump units are end bearings for axially positioning the vanes for the end pump units at such other ends.

REFERENCES:
patent: 949638 (1910-02-01), Stormer
patent: 1165852 (1915-12-01), Darlington
patent: 2293119 (1942-08-01), Davis
patent: 2676545 (1954-04-01), Barr
patent: 4619594 (1986-10-01), Moir

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