Patent ID: 6470787
Filing Date: 2002-10-29
Classification: F15B

Abstract:
A fluid pressure cylinder in which a stroke a piston is adjustable, comprising:a hollow cylinder tube; a pair of ports disposed on the hollow cylinder tube; a head cover and a rod cover, which are attached to opposite ends of said hollow cylinder tube; a head side pressure chamber and a rod side pressure chamber, each connected to one of the pair of ports; a piston, which is slidably accommodated within said cylinder tube; a piston rod including a hollow shape, a top end which is sealed and a base end which is connected to the head side pressure chamber through a central hole of the piston, the base end is slidably coupled with said piston and of which front end passes through said rod cover to be elongated to the outside of said cylinder tube; a stopper rod including a base end attached to said head cover so that the location thereof can be adjusted and a front end elongated toward and within said cylinder tube and passing through the central hole of said piston and being fitted within the hollow portion of said piston rod; a stopper portion, which is attached to a front end of said stopper rod and which is engaged from the inside of the piston rod to an engaging portion around said central hole of said piston at a forwarding stroke end of said piston; and an engaging portion formed inside the piston, the stopper portion engaging with the engaging portion; wherein the stopper rod and the stopper portion are inserted into the central hole disposed between the piston and the piston rod so that a gap is formed inside.