Patent ID: 7640737

Claim:
A hydraulic jack system of a kind having a large hydraulic cylinder for elevating a ram piston, a small hydraulic cylinder hydraulically interconnected with the large cylinder for applying an input load via a plunger, comprising: a base plate upon which the large cylinder and the small cylinder are mounted; a push rod for reciprocally moving the plunger on a first axis and, thereby, for causing the plunger to apply an input load through the small cylinder to the jack system so as to elevate the ram piston of the large cylinder; a camshaft configured to rotate about a second axis and, thereby, to exert a reciprocating motion to the push rod and to the plunger, the camshaft having a first terminal end and a second terminal end, each terminal end lying on the second axis; wherein, each of the first and second terminal ends of the camshaft is tipped only by a nut rotationally fixed to each terminal end; and each nut fixed to each terminal end is positioned in relation to the jack system to receive a socket that is mounted on a powered driver.