Patent ID: 6748974
Filing Date: 2004-06-15
Classification: F16K,Y10T

Abstract:
A valve member for a valve assembly for mixing hot and cold water including:a rotable non-reciprocal valve member positioned within said valve assembly to control the mixture of hot and cold water, said valve member including a hollow stem tube having hot and cold water inlet and outlet ports therein and a sealless reciprocally movable pressure balancing spool positioned within said stem tube, said stem tube including at least one wear plate receiving area, said spool and stem tube providing two spaced chambers, said stem tube cold water inlet and outlet ports opening into one chamber and said stem tube hot water inlet and outlet ports opening into the other chamber, with a portion of said chamber walls forming balancing surfaces such that said spool provides for balancing of pressures between the hot and cold water inlet ports; and at least one wear plate disposed on said at least one wear plate receiving area, said at least one wear plate being in fluid communication with at least one of said stem tube hot and cold water inlet and outlet ports.