Toilet tank supply valve assembly

Claim 1

A ball cock valve assembly comprising, in combination, a tubular shank for connection to a portable water supply and adapted for mounting the assembly in upstanding relation within a flush tank, a valve body having upper and lower portions and a valve member housed between such portions, said lower portion being removably secured to and in communication with said shank for receiving supply water therefrom, said valve body having a water outlet adjacent said shank for silent filling of an associated flush tank, float means for controlling said valve member, and a noise-free check valve positioned between said lower portion of the valve body and said shank upstream of said valve member for preventing backflow of water through said shank, said check valve comprising a tubular body portion having an inlet valve seat and a ball valve element movable against said seat, said body portion being provided with circumferentially spaced ribs caging said ball valve element and constraining the same against undue lateral wobble during rising and falling thereof relative to said inlet valve seat, said lower portion of said valve body includes a depending portion engaging said shank, and a pressure reducing member seated within said depending portion, said check valve being positioned against said pressure reducing member on the upstream side thereof.