Patent ID: 8025006
Filing Date: 2011-09-27
Classification: B63H

Abstract:
1. A hydraulic cylinder unit comprising: a cylinder; a piston disposed within the cylinder; a piston rod connected to the piston, the piston rod being reciprocatingly received within the cylinder, and the piston rod being movable between a first position in which the piston rod is substantially disposed within the cylinder and a second position in which the piston rod is fully extended outside the cylinder; a first hydraulic port and a second hydraulic port hydraulically connecting the cylinder unit to a reservoir, hydraulic fluid being received by the first hydraulic port and hydraulic fluid being discharged by the second hydraulic port when the piston rod is actuated to move towards the first position, and hydraulic fluid being received by the second hydraulic port and hydraulic fluid being discharged by the first hydraulic port when the piston rod is actuated to move towards the second position; and a bore connecting the cylinder to a down gallery, the bore allowing hydraulic fluid within the cylinder to recirculate to the reservoir when the piston rod is fully extended outside the cylinder.