Importance

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Abstract

A cushioned clamp cylinder with proximity switches includes a cap of square shape defining a plurality of right angularly related end faces with a cushion chamber in the cap and a sensing port in each end face communicating with the cushion chamber. A normally open proximity switch is selectively positioned in one of the sensing ports adjacent the chamber; one sensing port is connected to a pressure conduit and the other two sensing ports are plugged. A piston rod mounting a piston is positioned within the cylinder and mounts an inductive sleeve movable into the cushion chamber to activate the proximity switch. A flexible annular insert ring is positioned within the cap and has a wiping bead which extends into the cushion chamber and seals over the sleeve sealing the cushion chamber providing a pressure build-up and bringing the piston to a smooth stop as it bottoms out within the cylinder. A bleed screw is adjustably threaded into the cap and communicates with the cushion chamber.

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First Claim