Positive displacement pump having synchronously rotated non-circ

Details Positive displacement pump having synchronously rotated non-circ Positive displacement pump having synchronously rotated non-circ

1995-07-10

1997-10-07

Thorpe, Timothy

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 42, 4174234, 41742312, 4182011, F04B 4106

Patent

active

056740514

ABSTRACT:
A positive displacement pump includes a plurality of rotors accommodated in a housing, each of the rotors having a non-circular sectional shape, bearings for supporting rotation of the rotors, a fluid inlet formed in the housing on its suction side and a fluid outlet formed in the housing on its discharge side, motors for independently rotating the plurality of rotors, and detecting devices for detecting a rotating angle and/or a rotation frequency of each of the rotors. While the plurality of rotors are controlled to be synchronously rotated basis on of signals from the detecting devices, a change of a volume of a space defined by the rotors and housing from the suction side to the discharge side is utilized to thereby draw in and discharge a fluid.

REFERENCES:
patent: 4808077 (1989-02-01), Kan et al.
patent: 5197861 (1993-03-01), Maruyama et al.
patent: 5271719 (1993-12-01), Abe et al.
patent: 5302089 (1994-04-01), Maruyama et al.
patent: 5314312 (1994-05-01), Ikemoto et al.
patent: 5348448 (1994-09-01), Ikemoto et al.
patent: 5352097 (1994-10-01), Itou et al.
patent: 5354179 (1994-10-01), Maruyama et al.

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