Electric motor driven pump

Details Electric motor driven pump Electric motor driven pump

1993-12-06

1994-08-09

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

41742314, F04B 1700

Patent

active

053360648

ABSTRACT:
An electric motor driven pump for pumping a hazardous liquid includes an electric motor having a housing, energizing means surrounded by the housing and a rotatable output shaft extending from the housing. The housing contains a non-hazardous liquid that displaces oxygen in the housing so that explosions due to an electrical spark caused by failure of the electric motor is resisted. The pump further includes an impeller connected to the output shaft for pumping the hazardous liquid and an outer shell surrounding the electric motor. The outer shell and the electric motor define an outer space which contains an inert atmosphere and which isolates the electric motor from the hazardous liquid that is being pumped. In this way, explosions due to an electrical spark caused by failure of the electric motor and the presence of a hazardous liquid vapor are further resisted.

REFERENCES:
patent: 2545422 (1951-03-01), Blom
patent: 4886430 (1989-12-01), Veronesi et al.
patent: 5061157 (1991-10-01), Arakawa
patent: 5074764 (1991-12-01), Kobayashi et al.
patent: 5101128 (1992-03-01), Veronesi et al.
patent: 5118466 (1992-06-01), Raymond et al.
Framo Electric Pump Sales Brochure, Jan. 1993.

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