Sleeve valve mandrel and seal means for indexing valve assembly

Claim 1

A sleeve valve for use over a ported member for alternately opening and closing the ports in the ported member, said sleeve valve comprising: a generally cylindrical tubular housing adapted to be telescoped over a ported member and having ports through the wall alignable with ports in the ported member; a ported carrier sleeve slidably telescoped within said housing, having ports aligned with said housing ports, and further having two diametrically opposed windows through the wall thereof angularly displaced from said sleeve ports; locking means between said housing and said sleeve adapted to prevent rotational movement therebetween; two seal inserts, one in each of said windows, said seal inserts being arcuate plates with curvature substantially the same as the curvature of said carrier sleeve, said inserts having seal receiving channels on the inside surface thereof arranged to encircle the ports on the ported member; and, resilient seals in each of said inserts arranged to seat in said receiving channels and abut the ported member and form a fluid-tight seal therebetween.