Submersible deep well pump

Details Submersible deep well pump Submersible deep well pump

1977-07-01

1979-01-30

Freeh, William L.

Pumps

Including means to prevent foreign material settling from...

By application of separate fluid

417559, F04B 4700, F04B 2104

Patent

active

041370171

ABSTRACT:
A submersible deep well pump having two interconnecting chambers slidably receiving a movable hollow piston, each chamber having a check valve wherein movement of the piston alternately opens and closes the check valves allowing liquid displaced by the piston to be progressively moved through the chambers into the hollow piston and to the surface.

REFERENCES:
patent: 191448 (1877-05-01), Lewis
patent: 353897 (1886-12-01), Tengue
patent: 356750 (1887-02-01), Cully
patent: 445962 (1891-02-01), Montgomery
patent: 747728 (1903-12-01), Kirk
patent: 814312 (1906-03-01), Nevins
patent: 1065225 (1913-06-01), Conningham
patent: 1785834 (1930-12-01), Kilgore
patent: 1817659 (1931-08-01), Weaver
patent: 1909454 (1933-05-01), Brunner
patent: 2262128 (1941-11-01), Zehner
patent: 2326378 (1943-08-01), McConnollie
patent: 3945774 (1976-03-01), Doan

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