Hydraulic jack

Details Hydraulic jack Hydraulic jack

1975-04-21

1976-06-01

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

60481, 60482, 254 93H, 291564R, F15B 1518

Patent

active

039599701

ABSTRACT:
The present invention relates to a hydraulic jack with a base plate on which are attached a pump cylinder, a jack cylinder, and a reservoir concentrically surrounding the jack cylinder, the reservoir being connected to the pump cylinder by means of a first passage, passing through the base plate, and a first nonreturn valve which enables hydraulic medium to flow from the reservoir on pumping, the pump cylinder being connected to the jack cylinder by means of a second passage, passing through the base plate, and a second nonreturn valve which enables hydraulic medium to flow from the pump cylinder on pumping, and the jack cylinder being connected to the reservoir by means of a relief passage and a blocking member including an adjustable bolt.

REFERENCES:
patent: 1364865 (1921-01-01), Capell
patent: 1482256 (1924-01-01), Prall
patent: 2038974 (1936-04-01), Werner
patent: 2527428 (1950-10-01), Kemerer
patent: 3782689 (1974-01-01), Barosko
patent: R16900 (1928-03-01), Dybens

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