Fluid pressure operating means with a protective cover

摘要

The drive (10) has a piston rod (16) closed by a protection sleeve (22) whose end (22a) is fixed to the drive. A free end of the piston rod is engaged at a releasing element (18) i.e. coupling lever. The piston rod and the releasing element form a friction point (20). Another end (22b) of the protection sleeve is fixed to the piston rod outside the friction point. The point is surrounded by another protection sleeve (24) whose one end (24a) is fixed to the rod and another end (24b) lies against the releasing element in a pre-stressed manner. The sleeves are designed as folding bellows.