Mixing device for mixing two fluids, especially hot and cold water

Claim 1

A mixing valve for mixing two liquids having different temperatures and for controlling the volume and temperature of the mixed liquids, said mixing valve comprising: a valve housing having two inlets for the supply of the two liquids and an outlet for the discharge of the mixed liquids; a fixed valve disc fixed on said housing and having two inlet apertures aligned with said inlets and an outlet aperture aligned with said outlet; a movable valve disc mounted against said fixed valve disc for rectilinear and rotary movement relative thereto, said movable valve disc having therein a recess confronting said fixed valve disc and connecting said inlet apertures; a handle mounted on said housing for rotation relative thereto; means operably connected between said handle and said movable valve disc, for, upon rotation of said handle relative to said housing, controlling the volume of mixed liquids discharged through said outlet by moving said movable valve disc rectilinearly between a first volume control position, whereat said recess connects said inlet apertures to said outlet aperture thereby discharging the mixed liquids through said outlet, and a second volume control position, whereat said recess is out of communication with said outlet aperture and thereby discharge of the mixed liquids through the outlet is blocked; an electric motor mounted on said housing and having a rotatable output member; and means, operably connected between said output member and said movable valve disc, for, upon rotation of said output member selectively in opposite directions, controlling the temperature of the mixed liquids discharged through said outlet by rotating said movable valve disc in opposite directions to cause said recess to increase or decrease the relative cross-sectional areas of said inlet apertures connected to said outlet aperture.