Patent Number: 6,612,221

Title: Piston-cylinder device with piston rod locking means

Abstract: A pressure medium activated piston-cylinder device comprises a cylinder with two end walls both having pressure medium communication ports, a piston movably guided in the cylinder and connected to a piston rod which extends out of the cylinder through a sealed-off passageway in a first one of the end walls, and a piston rod locking device located in the passageway and including a clamping element axially locked to the first end wall, and an activating member which is continuously spring biased toward a clamping element activating position and shiftable by pressure medium toward a release position, against the spring bias force, wherein a manually operable release mechanism comprises a tubular thrust element movable in the first end wall between a rest position and an activating member releasing position, and a maneuver spindle having a cam surface for co-operation with a cam surface on the thrust element for moving the thrust element between its rest position and the activating member releasing position as the maneuver spindle is rotated.

Inventors: Rollg.ang.rdh; Folke Lennart (Dannike, SE)

Assignee: Parker Hannifin AB

International Classification: F15B 15/26 (20060101); F15B 15/00 (20060101); F15B 015/26 ()

Expiration Date: 09/02/2020