Pump with improved seal

Details Pump with improved seal Pump with improved seal

1987-07-09

1989-08-08

Croyle, Carlton R.

Pumps

Motor driven

Electric or magnetic motor

41742311, 41742312, 4174241, 415111, 4151684, F04B 4702

Patent

active

048548340

ABSTRACT:
A pump has a rotor-carrying pump shaft rotatably supported within an internal pipe by a plurality of spaced bearings. A lowermost bearing is located in the vicinity of the rotor near the end of the internal pipe. Adjacent to the lowermost bearing is a seal provided in a reduced-pressure chamber within the internal pipe, the chamber being closed off at the lower end by the bearing juxtaposed to the rotor. The reduced-pressure chamber is connected to an outlet opening in an external pipe which surrounds the internal pipe and is spaced therefrom to provide a transport channel for effluent material being moved by the rotating rotor.

REFERENCES:
patent: 1902431 (1933-03-01), Wais
patent: 1928795 (1933-10-01), Reid
patent: 2149602 (1939-03-01), Horvarth
patent: 2868233 (1959-01-01), Clark
patent: 3408942 (1968-11-01), Davenport et al.
patent: 3716309 (1973-02-01), Mitchell
patent: 4073606 (1978-02-01), Eller
patent: 4362471 (1982-12-01), Langes et al.
patent: 4530641 (1985-07-01), Gschwender
patent: 4614453 (1986-09-01), Tsune et al.
patent: 4621981 (1986-11-01), Lorett
patent: 4669953 (1987-06-01), Gschwender
patent: 4671740 (1987-06-01), Ormistan et al.
patent: 4679994 (1987-07-01), Brown

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