Patent ID: 6375156
Filing Date: 2002-04-23
Classification: B23K,Y10T

Abstract:
A valve piston and cylinder assembly having a frame for housing two coaxial back-to-back cylinders having a common end wall, a piston and rod operably mounted in each respective cylinder for independently controlling the extension of each piston rod, said valve piston and cylinder assembly comprising:said common end wall forming a manifold with a first bore therein for receiving a spool valve; said manifold having a first set of pneumatic control passageways leading to the bore and in communication with an air supply, both ends of at least one cylinder, and an exhaust port; a spool valve slidably mounted in said first bore for controlling the communication of passageways of the first set with one another; and a first actuator pilot valve mounted at the side of the manifold at one end of said first bore for controlling the position of said spool valve.