Pump with medium tight shell and venting means

Details Pump with medium tight shell and venting means Pump with medium tight shell and venting means

1994-01-14

1995-07-25

Bertsch, Richard A.

Pumps

Motor driven

Pump fluid communicates with sealed chamber containing armature

417370, 417420, 417366, 417435, F04B 1700, F04B 3902, F04B 3900

Patent

active

054357012

ABSTRACT:
A pump (1) includes a pumphouse (2) having an inlet (3) for admitting a medium at a suction side of the pump and an outlet (4) for discharching the medium at a delivery side of the pump. A pumping device is rotatably arranged on an axle (6), the axle being driven by a driver including a rotor and a device for coupling energy to the rotor. A medium tight shell (11) is arranged around the rotor and the axle; and a first canal (18) extends from a first location at a level near or beyond an axial bearing to a second location (24) in the pump where a lower pressure is dominant than at the first location.

REFERENCES:
patent: 2687695 (1954-08-01), Blom et al.
patent: 2939399 (1960-06-01), Rutschi
patent: 2994795 (1961-08-01), Cattabiani
patent: 3280750 (1966-10-01), White
patent: 4013053 (1977-03-01), Dinkelkamp et al.
patent: 4416586 (1983-11-01), Diederich et al.
patent: 4871301 (1989-10-01), Buse
patent: 5038891 (1991-08-01), Wallis
patent: 5248245 (1993-09-01), Behnke et al.

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