Pumping apparatus particularly for oil wells

Details Pumping apparatus particularly for oil wells Pumping apparatus particularly for oil wells

1975-06-06

1977-12-20

Freeh, William L.

Pumps

Motor driven

Relatively movable pumping members driven by relatively...

7424215R, 92137, F04B 1700

Patent

active

040638251

ABSTRACT:
A pair of pumps which are joined by a flexible connection passing over a rotatable device positioned for rotation in a substantially vertical plane. The rotatable means is driven alternately in clockwise and counterclockwise directions whereby the lifting of one pump occurs as the other pump is lowered.

REFERENCES:
patent: 300665 (1884-06-01), Vandervoort
patent: 476398 (1892-06-01), Long
patent: 961039 (1910-06-01), Starr
patent: 1359644 (1920-11-01), Wright
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patent: 2229115 (1941-01-01), Murray
patent: 2341864 (1944-02-01), Grumbaugh
patent: 2613915 (1952-10-01), Stone
patent: 3464317 (1969-09-01), Woodward
patent: 3709105 (1973-01-01), Ridley
patent: 3749525 (1973-07-01), Hooper et al.
patent: 3839865 (1974-10-01), Chardonneau et al.

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