Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...
Patent
1977-10-17
1979-09-11
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Cyclically operable reciprocating or oscillating motor or...
60372, 60378, 60413, F15B 1518
Patent
active
041670981
ABSTRACT:
A horizontally exposed pumping unit including a hollow base structure containing a volume of hydraulic fluid and compressed air, the base structure supporting a horizontally aligned reciprocating piston assembly deployed for horizontal translation along a support track formed thereon. The piston assembly terminates at the free end in a roller attached to the cylinder structure, the piston rod in turn being secured to yet another fixed roller. A sheave chain connected to the cylinder exterior passes around the rollers to be played out along the track, the chain being turned around the translating roller to a guide roller deployed above an oil well. The articulation of the piston assembly is achieved by way of an electrically driven hydraulic pump communicating between the hollow base structure and the cylinder. Two reversing switches are deployed within the track to change the direction of the hydraulic pump according to the stroke position of the piston assembly. In addition two single action pistons are adjustably deployed at the ends of the cylinder stroke for transferring hydraulic fluid in or out of the hollow base structure to compensate for the variations in the pneumatic spring.
REFERENCES:
patent: 1848736 (1932-03-01), Mason
patent: 2390124 (1945-12-01), Ross
patent: 2802336 (1957-08-01), Ball
patent: 3230711 (1966-01-01), Swain et al.
patent: 3782117 (1974-01-01), James
Bak-Boychuk I. Michael
Geoghegan Edgar W.
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