Pump apparatus

Details Pump apparatus Pump apparatus

1986-06-05

1988-11-15

Stout, Donald E.

Pumps

Motor driven

Electric or magnetic motor

41742314, 4174231, F04B 1700, F04B 3504

Patent

active

047845872

ABSTRACT:
A pump apparatus comprises a pump housing, an impeller having a plurality of radial grooves rotatably disposed within the pump housing, first and second fluid passages each defined by the impeller and the pump housing at both sides of the impeller, a motor having an output shaft for driving the impeller, a first radial clearance between the impeller and the output shaft of the motor, and a second radial clearance between an outer peripheral surface of the impeller and the pump housing, which is smaller than the first clearance.

REFERENCES:
patent: 3315607 (1967-04-01), McInnes
patent: 3418991 (1968-12-01), Shultz et al.
patent: 3658444 (1972-04-01), Rhodes et al.
patent: 4295797 (1981-10-01), Ruhl et al.
patent: 4445820 (1984-05-01), Hayashi et al.
patent: 4445821 (1984-05-01), Watanabe et al.
patent: 4449891 (1984-05-01), Kemmner
patent: 4451213 (1984-05-01), Takei et al.
patent: 4466781 (1984-08-01), Kemmner et al.
patent: 4478550 (1984-10-01), Watanabe et al.
patent: 4516915 (1985-05-01), Jensen et al.
patent: 4573882 (1986-03-01), Watanabe et al.

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