Patent ID: 6203311
Filing Date: 2001-03-20
Classification: B29C,Y10T

Abstract:
A sliding ring non-return valve comprising:a frame having fluid passages extending from a proximal end of the frame to a distal end of the frame, a portion of the frame's outer surface defining an axial sealing surface;a retainer attached to proximal end of the frame, a portion of the retainer defining a radial scaling surface;an inlet groove formed in the frame and extending circumferentially about the outer surface of the frame, the inlet groove intersecting the fluid passages at the proximal end of the frame, the inlet groove having a pair of opposed sidewalls defining a groove width; anda ring member, longer than the width of the inlet groove and slidable between a closed position in which the inlet groove in the frame is obstructed and the ring abuts and seals with the axial and radial seal surfaces, and an open position in which the fluid passages are not obstructed.