Push-pull single handle water faucet valve

Claim 1

A single handle hot and cold water mixing and flow control faucet valve of the type having a main body enclosing relatively movable valve means selectively operable to connect or isolate hot and cold water sources with water outlet means and an elongate manually movable operating stem operably connected to said valve means for movement therewith and projecting from said main body, said stem being reciprocally movable along its longitudinal axis between a retracted off position and an extended full volume position to vary the flow volume through said faucet valve and rotatable about its own axis between a cold water only position and a hot water only position to vary the proportions of hot and cold water passing through said faucet valve. the improvement comprising: first and second fixed stop means spaced apart on the outer periphery of said main body and extending substantially parallel to said axis, third fixed stop means adjacent said second fixed stop means on the outer periphery of said main body and extending at an angle from said second stop means, and first movable stop means secured to said stem for movement therewith, said third fixed stop means and said first movable stop means cooperating to prevent axial movement of said stem to the retracted off position unless said stem is in the cold water only rotational position, said first movable stop means in said retracted off position being received between said first and second fixed stop means and cooperating therewith to prevent rotation of said stem from the cold water only position while permitting axial movement of said stem towards the extended full volume position, said first movable stop and said first fixed stop means cooperating to prevent rotation of said stem in a first rotational direction from said cold water only position when said stem is in all axial positions.