Patent ID: 6179004
Filing Date: 2001-01-30
Classification: B31B,Y10T

Abstract:
A valving manifold assembly for transferring fluid pressure between a stationary frame and a rotary frame comprising a distribution manifold section connected to rotate with the rotary frame, a stationary manifold hub mounted on the stationary frame and forming part of the manifold assembly, a piston having a cylindrical outer surface carried by and surrounding said hub and having a plurality of part annular grooves on an outwardly facing first end surface thereof which first end surface is perpendicular to an axis of rotation, the part annular grooves having an annular length to provide fluid pressure to ports on the surface of the distribution manifold section aligning with the part annular grooves on the first end surface of the piston during selected portions of rotation of the distribution manifold section, a pressure chamber formed on a second end surface of the piston opposite from the outwardly facing first end surface to provide a force on the piston urging the piston toward the distribution manifold section, the part annular grooves on the first end surface of said piston having a smaller area than the second end surface of the piston, and a conduit for carrying pressure from the distribution manifold section to a remote actuator on the rotary frame to operate the actuator.