Positive displacement pump

Details Positive displacement pump Positive displacement pump

1983-02-28

1984-06-12

Smith, Leonard E.

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

F04C 200, F01C 124

Patent

active

044539010

ABSTRACT:
A sanitary positive displacement pump having increased internal clearances to allow increased operating pressures without detrimental wear while maintaining high volumetric efficiency. The invention includes rigid and accurate positioning of the liquid impellers to the shafts while maintaining ease of disassembly and assembly. The impellers are secured on the shafts by cooperating frusto-conical surfaces on each of a pair of nuts. A rubber retainer ring enables manual release of the nuts but prevents inadvertent spinoff.

REFERENCES:
patent: 1116095 (1914-11-01), Mellis
patent: 1457455 (1923-06-01), Peters
patent: 1494129 (1924-05-01), Ravier
patent: 1639803 (1927-08-01), Jonsson
patent: 1717789 (1929-06-01), Larrad
patent: 2449846 (1948-09-01), Gilman
patent: 3494399 (1970-02-01), Heighberger
patent: 4057375 (1977-11-01), Nachtrieb
patent: 4290736 (1981-09-01), Bernasconi

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