Pump assembly

Details Pump assembly Pump assembly

1976-01-12

1978-02-07

Freeh, William L.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

F04C 1500

Patent

active

040724506

ABSTRACT:
An improved pump assembly includes a pressure plate having inlet and outlet ports for conducting fluid to and from a pumping chamber. The pressure plate includes three layers formed by plate sections having major side surfaces which are bonded together to prevent leakage between the layers. A first one of the plate sections has an outer side surface which is disposed adjacent to the pump rotor. This first plate section is advantageously made of a wear-resistant material to minimize wear upon rotation of the rotor. An intermediate plate section is disposed between the first plate section and a second plate section. The intermediate plate section cooperates with at least one of the two outer plate sections to form a passage which interconnects a pair of ports formed in the pressure plate. In the illustrated embodiment of the invention, the passage is utilized to connect a pair of inlet ports in fluid communication.

REFERENCES:
patent: 3171359 (1965-03-01), Spencer et al.
patent: 3200752 (1965-08-01), Clark et al.
patent: 3499390 (1970-03-01), Prijatel
patent: 3822965 (1974-07-01), Drutchas

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