IMPROVED WATER TAP WITH BALL VALVE Russian patent published in 1999 - IPC

FIELD: applicable in water pipe-line fittings, in particular, in water tap mixing valve. SUBSTANCE: mixing valve comprises a movable ball valve member installed in the body cavity. The body has several inlet ports and an outlet port. The latters communicate with the cavity. The ball valve member is engageable with the inlet ports for control of the flow rate and temperature of mixture running through the ports. The body has a through hole. The lever is connected to the ball valve member and projects through the mentioned hole in the body. The valve body accommodates a bush assembly. The body of the bush assembly has an upper opening for passage of the operating lever, and a lower end. The bush assembly body around the upper opening has a location to receive the packing. The packing is positioned in its location and hermetically pressed into the movable ball valve member. The bush assembly body has a longitudinal groove. The latter passes between the upper opening and its lower end face. A pin is located across the ball member. The pin projects beyond the ball member and is located in the groove for sliding and turning. The pin provides for turning of the ball member along the first axis coinciding with the pin and second axis. The latter is located across the longitudinal groove and the first axis. The invention has modifications. One modification concerns the specific features of the body of the mixing valve with location of the first longitudinal groove in the symmetry plane. The symmetry plane is positioned between several inlet ports. The next modification concerns the specific features of the design of the bush assembly with the ball member for the mixing valve. EFFECT: improved and facilitated temperature control at a full opening of the tap. 16 cl, 6 dwg