Pump unit

Pumps – Motor driven – Electric or magnetic motor

Patent

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Details

41742313, 41742314, 417368, F04D 100

Patent

active

049328484

ABSTRACT:
The invention relates to a pump unit comprising a liquid filled electric motor with a house and with a vertical driving shaft extending downwards, a pump comprising a pump house, and a pump portion which is connected with a driving shaft, and a chamber around said driving shaft, between the motor and the pump with a mechanical packing between motor and chamber. The pump unit is characterized by the fact that the motor house and the pump house are combined to a press shell which is closed to the ouside. The chamber has a pressure equalizing connection with a first place in the pump. The liquid filled motor house has a pressure equalizing connection with a second place in the said pump where the pressure is higher than at said first place.

REFERENCES:
patent: 1974678 (1934-09-01), LaFont
patent: 2406947 (1946-09-01), Harlamoff
patent: 2674194 (1954-04-01), Arutunoff
patent: 2682229 (1954-06-01), Luenberger
patent: 3694110 (1972-09-01), Guinard
patent: 3764236 (1973-10-01), Carter
patent: 3975117 (1976-08-01), Carter

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