Mixing valve for controlling pressure and temperature of a liquid

Claim 1

In a mixing valve for mixing two input liquids having different temperatures and pressures, more particularly for mixing cold and hot water having variable openings of passage for controlling both the temperature and quantity of liquid output using a pressure equalizing cartridge, the improvement comprising: said cartridge having a cylindrical housing, a liner member disposed about said cartridge; a plurality of radial discharge openings on said housing, a piston within said cartridge and axially movable in response to pressure variations; a combined control means for controlling liquid temperatures and quantities, said openings forming a part of said control means; said liner having two series of discharge ports and said control means operable to completely block each of the two series of discharge ports in sections of the liner pipe said discharge ports disposed in operative variable connection with the discharge openings; said cartridge disposed for both rotatory and axial movement relative to the liner to vary the operative connection of said discharge ports and discharge openings; said relative axial movement of the pressure equalizing cartridge with a corresponding section of the liner pipe varying the proportions of the input liquids to control the temperature, and said relative rotary movement of the pressure equalizing cartridge with the sections of the liner pipe blocking said discharge ports to control quantity.