Thermostatically controlled motorized hot water valve sealed by fluid pressure

Claim 1

IN A VALVE HAVING A HOUSING INCLUDING A VALVE CHAMBER, AN INLET PORT AND AN OUTLET PORT IN THE VALVE CHAMBER, A VALVE MEMBER FOR OPENING AND CLOSING THE VALVE CHAMBER, AND A THERMOSTATICALLY CONTROLLED NON-REVERSIBLE MOTOR FOR INTERMITTENTLY ROTATING THE VALVE MEMBER THROUGH NINETY DEGREE TURNS, THE IMPROVEMENT WHEREIN THE VALVE CHAMBER HAS A CYLINDRICAL SIDE WALL, A ROTATABLE VALVE SHAFT PROJECTING INTO THE VALVE CHAMBER, THE OUTLET PORT HAVING A SMALLER DIAMETER THAN THAT OF THE CYLINDRICAL SIDE WALL, THE VALVE MEMBER HAVING A THIN CYLINDRICAL WITHIN AND GENERALLY COAXIAL WITH THE CYLINDRICAL WALL OF THE VALVE CHAMBER, A PAIR OF DIAMETRICALLY OPPOSED OPENINGS THROUGH THE CYLINDRICAL WALL OF THE VALVE MEMBER, THE VALVE MEMBER HAVING SOLID WALLS BETWEEN THE OPENINGS, THE EXTERNAL DIAMETER OF THE VALVE MEMBER BEING LESS THAN THE INTERNAL DIAMETER OF THE VALVE CHAMBER, THE VALVE MEMBER HAVING A TOP BY WHICH IT IS SLIDABLY SUSPENDED FROM THE VALVES SHAFT, WHEREBY ROTATION OF THE VALVE SHAFT ROTATES THE VALVE MEMBER TO ALTERNATELY ESTABLISH COMMUNICATION BETWEEN THE INLET AND OUTLET PORTS THROUGH THE OPENINGS IN THE VALVE MEMBER AND TO BLOCK SUCH COMMUNICATION BY POSITIONING A SOLID WALL OPPOSITE THE OUTLET PORT AND A SOLID WALL OPPOSITE THE INLET PORT, THE SLIDEABLE SUPPORT OF THE VALVE MEMBER PERMITTING THE VALVE MEMBER TO SLIDE TOWARD THE OUTLET PORT IN RESPONSE TO INLET PRESSURE AGAINST A SOLID WALL, THE VALVE MEMBER BEING SUFFICIENTLY THIN TO BE DEFORMEBLE BY THE INLET PRESSURE TO INCREASE THE SEATING AREA AROUND THE OUTLET PORT, THE INLET PRESSURE THEREBY SEATING A SOLID WALL AGAINST THE OUTLET PORT, THE VALVE MEMBER BEING SYMMETRICAL IN HAVING DIAMETRICALLY OPPOSED SOLID WALLS AND DIAMETRICALLY OPPOSED HOLES SO THAT CONSECUTIVE OPENING AND CLOSING OF THE VALVE CAN BE ACCOMPLISHED BY ROTATING THE VALVE MEMBER IN A SINGLE DIRECTION.