Patent ID: 7694693

Claim:
A mixing valve assembly operable to deliver an output fluid with a composition determined by a selected ratio of input fluids, said assembly comprising: an incrementally positionable ball element having an adjustable rotational position within said mixing valve assembly, said ball having continuously varying restrictive inlets, a mixing chamber in fluid communication with said inlets, and an outlet for delivery of said outlet fluid, said outlet being in fluid communication with said mixing chamber wherein said ball is further characterized by spaced apart interior restrictor walls defining on opposite sides thereof inlet chambers and between them said mixing chamber wherein said interior restrictor walls are disposed between said inlet chambers to channel fluids from said inlet chambers to said mixing chamber, and wherein; said selected ratio is determined by the rotational position of said ball, and wherein each said opening has a corresponding inlet flow resistance, further wherein each said inlet has a size which is proportional to each said corresponding inlet flow resistance, wherein said inlets are substantially wedge shaped, each having a wide forward edge and a narrow rear apex.