Rotary pump with wiper insert

Details Rotary pump with wiper insert Rotary pump with wiper insert

1997-11-25

2000-04-25

Denion, Thomas

Rotary expansible chamber devices

With mechanical sealing

Seal on working member periphery separates inlet and outlet...

418 1, 418113, 4182066, F01C 1902

Patent

active

060537175

ABSTRACT:
A positive displacement rotary pump with an improved impeller design integrating a replaceable wiper insert. The impeller generally has or more lobes and an equal number of conjugate surfaces. Each lobe has a cavity which holds a wiper blade. The wiper blade improves efficiency by making a seal with a pump chamber or the conjugate surface on the other impeller as it rotates. The wiper is pressed radially outward from a central axis of the impeller by a biasing means such as a spring.

REFERENCES:
patent: 1348772 (1920-08-01), Auger
patent: 1407496 (1922-02-01), Storey
patent: 1665120 (1928-04-01), Wendell
patent: 5567140 (1996-10-01), Dodd

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