Single handled mixing valve

In a valve structure, a valve body having wall means defining a chamber, a valve seat in said chamber, means forming a pair of inlet ports in said seat and opening into said chamber, a valve plate slideable on said seat, flow control means in said valve plate cooperable with said inlet ports for determining the relative opening of said ports and the combined volume of flow therethrough, actuating means for moving said valve plate, means confining said valve plate for sliding movement on said valve seat, a connection between said valve plate and said actuating means, means associated with said actuating means for shifting said valve plate laterally along a central axis of said valve plate a controlled amount from an off position of said valve wherein said flow control means prevents flow through said inlet ports, to a full-on position wherein said flow control means permits a maximum combined flow through said inlet ports, with a varying combined volume of flow through said ports permitted by said flow control means at positions of said valve plate between said off position and said full-on position, a first stop means limiting said lateral motion of said valve plate to said extreme off and full-on positions, means associated with said actuating means for rotating said valve plate about its axis through a predetermined arc, and a second stop means limiting rotational motion of said valve plate to extreme positions of said arc wherein said flow control means permits flow only through one or the other of said inlet ports, with varying proportions of flow through said respective inlet ports permitted by said flow control means at angular positions of said valve plate between said extreme stop positions of said valve plate in said arc, said flow control means in the said valve plate being arranged to communicate with said inlet ports in said valve seat, means forming an outlet port in said valve seat and opening into said chamber, said flow control means being arranged to communicate with said outlet port means forming an outlet from said chamber and communicating with said outlet port, said flow control means comprising a pair of separate flow control passages in said valve plate, said inlet ports in said valve seat comprising a pair of arcuately shaped outwardly divergent ports, said control passages in said valve plate comprising a pair of arcuate grooves in the bottom of said valve plate, the inner ends of said arcuate grooves being arranged to selectively communicate with one or both of said arcuate inlet ports over varying areas of said respective inlet ports when said valve plate is shifted away from its off-position, the outer ends of said arcuate grooves being positioned for communication with said outlet port in said valve seat.

In a valve structure, a valve body including a cup defining a chamber, a fitting supporting said cup, a cover positioned on said cup, a pair of inlet holes in said fitting and a pair of inlets in the bottom of said cup, said inlet holes communicating respectively with said inlets, a flat valve seat mounted in said cup above the bottom thereof, a pair of arcuately shaped outwardly divergent ports in said valve seat, said ports communicating with said respective inlets, a valve plate slideable on said valve seat, circular groove means comprising a pair of arcuate grooves in the bottom of said valve plate, first adjacent inner ends of said arcuate grooves being arranged respectively to communicate with said arcuate inlet ports over varying areas of said respective inlet ports during sliding movement of said valve plate on said valve seat, an outlet hole in said fitting, an outlet in the bottom of said cup, said outlet communicating with said outlet hole, an outlet port in said valve seat and forming a mixing chamber, said outlet port communicating with said outlet, second adjacent outer ends of said arcuate grooves in said valve plate opposite said first adjacent ends being positioned for communication with said outlet port in said valve seat, and a member mounted on said cover in slideable contact with the upper surface of said valve plate and confining said valve plate for slideable movement on said valve seat.