Motors: expansible chamber type – Cyclically operable
Patent
1978-07-11
1980-05-06
Geoghegan, Edgar W.
Motors: expansible chamber type
Cyclically operable
91303, 60369, 60379, 60456, 74590, F01L 1500, F16D 3100
Patent
active
042011159
ABSTRACT:
An oil well pump jack with dual hydraulically operated piston and cylinder assemblies for pivoting the walking beam of the pump jack and including a unique control arrangement for controlling operation of the piston and cylinder assemblies. The pump jack includes a unique base or skid and an adjustable knee brace assembly to facilitate positioning of the pump jack in properly supported relation to the oil well at the oil well site. The control arrangement for the piston and cylinder assemblies includes a reversing valve, a linkage mechanism for operating the reversing valve to cause controlled oscillation of the walking beam and a cushioning device for controlling acceleration and deceleration of the oscillating walking beam to reduce abrupt tension forces exerted on the polish rod and sucker rods and impact forces imparted to the pump jack during oscillation of the walking beam. The control arrangement also enables the hydraulic piston and cylinder assemblies to be operated in a double acting mode or a single acting mode and includes a lockout device to convert automatic operation of the pump jack to manual operation thereof.
REFERENCES:
patent: 2131910 (1938-10-01), Vernon et al.
patent: 2232449 (1941-02-01), Habenicht
patent: 2550723 (1951-05-01), Ross
patent: 2704998 (1955-03-01), Day et al.
patent: 3175513 (1965-03-01), Dulaney
patent: 3221568 (1965-12-01), Ross
patent: 3369490 (1968-02-01), Hawk
patent: 3405605 (1968-10-01), Ross
patent: 3884095 (1975-05-01), Miyao
patent: 3971213 (1976-07-01), Kelley
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