Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...
Patent
1978-08-21
1980-04-22
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Cyclically operable reciprocating or oscillating motor or...
60372, 60387, 91275, F15B 1518
Patent
active
041988205
ABSTRACT:
A pumping unit for a well pump has a surface main cylinder with a main piston reciprocable therein, the piston having a connection to a standard well pump. In a flow cylinder of a relatively large diameter, a flow piston reciprocates within and divides the flow cylinder into a first flow chamber and a second flow chamber. The first flow chamber is in communication with the main cylinder. Air under pressure substantially to counterbalance the load on the well pump connection is supplied to the second flow chamber. There is a drive cylinder divided into a first drive chamber and a second drive chamber by a drive piston connected to but substantially smaller in diameter than the flow piston. A source of liquid under relatively high pressure and a sink for liquid under relatively low pressure are joined through a reversing valve to the opposite ends of the drive cylinder through ducts controlled by a reversing valve connecting the opposite drive chambers alternately between the pressure source and the pressure sink. In one of the ducts is a throttling valve movable between a restricted flow position and an unrestricted flow position, the valve being moved in response to the position of the drive piston. The combination provides an automatically operating, hydraulically actuated and air balanced intensifier actuating device for a well pump.
REFERENCES:
patent: 2613703 (1932-10-01), Calvert
patent: 3916768 (1975-11-01), Martin
Roth Albert B.
Thacher Wallace L.
Geoghegan Edgar W.
N L Industries, Inc.
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