Seal for rodless cylinder with shuttle piston

摘要

The invention relates to a shuttle piston cylinder whose axially moving piston carries a power transmission element projecting out through a longitudinal slot in the wall of the cylinder barrel. A flexible seal band looped through the power transmission element seals off the slot in the parts thereof between the ends of the cylinder and the piston. The seal band is made in one piece and has a sealing lip that causes a sealing effect when acted upon by internal pressure. Furthermore the seal band has beads that are able to lock into the longitudinal slot of the barrel and hold the band therein and furthermore act to keep out dirt from the cylinder. Preferably the flexible band is reinforced by a steel band that is partly embedded in the seal band or is bonded by vulcanization onto the inner face thereof.