Patent ID: 6178868
Filing Date: 2001-01-30
Classification: B23D,F15B

Abstract:
A system for producing a controlled deceleration of piston travel, at either or both ends of a piston stroke, in an air cylinder having pressure/exhaust ports, and being used to move an external load in a mostly linear path, said system comprising:a) an air pressure supply line to the pressure/exhaust ports of said cylinder;b) control valve means in said supply line causing piston travel and stroke reversal on receipt of an electrical signal; andc) an exhaust circuit for each cylinder port including a pressure surge tank, admission and venting valve means connected to said surge tank; said admission and venting valve means causing back pressure to be applied against said piston travel or vented to the atmosphere on receipt of an electrical signal;said control valve means and said admission and venting valve means causing start and reversal of said piston travel and a controlled deceleration thereof.