Patent ID: 6347573
Filing Date: 2002-02-19
Classification: F16F

Abstract:
A piston-cylinder unit having an adjustable stroke length, comprisinga cylinder having an axis, a closed end and a rod end, a piston rod supported in the rod end of the cylinder in sealed and sliding relation, a piston received on the piston rod for axial movement relative to the piston rod and received in the cylinder for axial movement relative to the cylinder, a threaded connection between the piston rod and the piston, a stop surface on a side of the piston facing the rod end of the cylinder, and a counterstop surface associated in fixed relation with the cylinder and facing the closed end of the cylinder, the stop surface being engageable with the counterstop surface when the rod is extended from the cylinder to a full stroke length position and upon such engagement the piston being held rotationally fixed to the cylinder such that upon rotation of the cylinder about the axis, the piston is rotated relative to the piston rod and is moved axially along the piston rod by the threaded connection to change the stroke length.