Pneumatic cylinder and control valve therefor

Motors: expansible chamber type – With motive fluid valve – Contracting chamber exhaust valve controlled by expanding...

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91422, 91442, 91443, 91452, 91520, 251117, 1375133, F15B 1108, F15B 1304

Patent

active

056238614

ABSTRACT:
A pneumatic cylinder, especially for a spot-welding machine, has a sleeve valve mounted on the piston rod. The sleeve valve provides a venting valve for dumping pressure from a return chamber at the end of the forward stroke, and a progressive restrictor to close off a forward chamber and provide cushioning at the end of the return stroke.

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