Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...
Patent
1983-06-30
1985-08-13
Cohen, Irwin C.
Power plants
Pressure fluid source and motor
Cyclically operable reciprocating or oscillating motor or...
91304, 91314, 91337, 91338, F04B 4704, F15B 13042
Patent
active
045341680
ABSTRACT:
A pump jack having a walking beam oscillated in a vertical arc by a hydraulic actuating cylinder that receives pressurized hydraulic fluid from a variable displacement pump. The hydraulic actuating cylinder is controlled by a hydraulic valve having an operating member mechanically shifted by a second hydraulic actuating cylinder near the end points of the pivotation arc of the walking beam to reverse the direction of movement of the walking beam during the shifting of the operating member of the hydraulic valve. The second hydraulic actuating cylinder is controlled by a second hydraulic valve that transmits pressure to the second hydraulic actuating cylinder from the variable displacement pump and reverses the flow of pressurized hydraulic fluid to the ports of the second hydraulic actuating cylinder near the end points of the pivotation arc of the walking beam.
REFERENCES:
patent: 2488596 (1949-11-01), Hungate
patent: 2699154 (1955-01-01), Smith
patent: 2887955 (1959-05-01), Owen
patent: 2972863 (1961-02-01), Hyde
patent: 2977040 (1961-03-01), Dulebohn et al.
patent: 3164325 (1965-01-01), Veum
patent: 3369490 (1968-02-01), Hawk
patent: 4066239 (1978-01-01), Hall
patent: 4346620 (1982-08-01), Stanton
patent: 4374485 (1983-02-01), Lattuada
LandOfFree
Pump jack does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pump jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump jack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2311115