Patent ID: 6612221
Filing Date: 2003-09-02
Classification: F15B

Abstract:
Pressure medium activated piston-cylinder device, comprising a cylinder (10) with two opposite end walls (11,12) provided with pressure medium communication ports (16,17), a piston (13) movably guided in said cylinder (10) and connected to a piston rod (14) which extends out of said cylinder (10) through a sealed-off passageway (18) in a first one (12) of said end walls (11,12), a piston rod locking device (21) located in said passageway (18) and including at least one clamping element (22) axially locked relative to said first end wall (12) and arranged to frictionally engage said piston rod (14), and an activating member (23) continuously spring biassed toward a clamping element (22) activating position and shiftable by pressure medium toward a release position against said spring bias force,characterized in that said piston rod locking device (21) comprises a manually operable release mechanism which includes a thrust element (32) movably supported in said first end wall (12) between a rest position and an activating member (23) releasing position, a maneuver spindle (33) rotatably supported in said first end wall (12) and having a maneuverable end portion (48) extending outside said first end wall (12), a first cam surface (41) provided on said thrust element (32) and a second cam surface (46) provided on said maneuver spindle (33), said first cam surface (41) being engaged by said second cam surface (46) for accomplishing movement of said thrust element (32) between said rest position and said activating member (23) releasing position as said maneuver spindle (33) is rotated.