Multistage centrifugal chopper pump

Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices

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Details

4151211, F01D 504

Patent

active

054565804

ABSTRACT:
A centrifugal pump has an impeller with vanes including cutting edges at the intake side of the pump bowl. The intake side of the bowl is closed by an intake plate, and an external cutter has blades in close cutting relationship to raised anvil ribs on the intake plate. The intake plate has an outward opening recess including a first portion of one diameter and a second portion of a greater diameter. The external cutter has respective first and second portions closely received in the first and second recess portions, respectively. The first portion of the external cutter cooperates with the first portion of the intake plate recess, and the second portion cooperates with the second recess portion, to chop solid matter entering the pump through the intake plate.

REFERENCES:
patent: 2265758 (1941-12-01), Klosson
patent: 2714354 (1955-08-01), Farrand
patent: 2934023 (1960-04-01), Lamkin et al.
patent: 3155046 (1964-11-01), Vaughan
patent: 3325107 (1967-06-01), Peterson
patent: 3340812 (1967-09-01), Schlesiger
patent: 3444818 (1969-05-01), Sutton
patent: 3447475 (1969-06-01), Blum
patent: 3915394 (1975-10-01), Ferguson, Jr.
patent: 3973866 (1976-08-01), Vaughan
patent: 4378093 (1983-05-01), Keener
patent: 4430214 (1984-02-01), Baker
patent: 4527947 (1985-07-01), Elliott
patent: 4575308 (1986-03-01), Corkill
patent: 4842479 (1989-06-01), Dorsch
patent: 5256032 (1993-10-01), Dorsch
Vaughan Company, Inc., "General Notes on Adding an Integral Cutter to a Vaughan Cutter Bar in The Field," (1987).

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