Pump for hot and cold fluids

Details Pump for hot and cold fluids Pump for hot and cold fluids

1996-11-26

1998-08-25

Vrablik, John J.

Rotary expansible chamber devices

Multistage

Interengaging rotary members

418171, 418179, F04C 210, F04C 1300

Patent

active

057977348

ABSTRACT:
A gear-type pump having an inner rotor and an outer rotor and in which the outer rotor is supported for rotation by a plurality of roller bearings interposed between a support housing and the outer rotor and in which the inner and outer rotors and the support housing are made of the same material and have essentially the same width dimension so that the thermal contraction of the support housing and the thermal contraction of the inner and outer rotors while pumping super-cooled fluid does not adversely affect the end-clearance between the end plates and the inner and outer rotors to an extent where the efficiency of the pump would differ if it were pumping fluid at a temperature of 70 degrees Fahrenheit.

REFERENCES:
patent: 2337903 (1943-12-01), Lauck
patent: 2956512 (1960-10-01), Brundage
patent: 2966118 (1960-12-01), McAlvay
patent: 3272130 (1966-09-01), Mosbacher
patent: 3288034 (1966-11-01), White, Jr. et al.
patent: 3459337 (1969-08-01), Williamson
patent: 3722329 (1973-03-01), Van Hecke et al.
patent: 4992034 (1991-02-01), Uppal
patent: 5139395 (1992-08-01), Kemmner
patent: 5618171 (1997-04-01), von Behr et al.

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