Valve with nonrotating valve stem

Claim 1

A VALVE HAVING A HOUSING HAVING AN INLET AND AN OUTLET AND A FLUID PASSAGEWAY INTERCONNECTING THE INLET AND THE OUTLET IN SAID HOUSING, AN ELONGATED VALVE MEMBER RECIPROCABLE AXIALLY OF ITSELF TO OPEN AND CLOSE THE PASSAGEWAY, A VALVE ACTUATOR SCREW-THREADEDLY MOUNTED ON THE VALVE FOR HELICAL MOVEMENT COAXIALLY OF THE VALVE MEMBER AND HAVING A CYLINDRICAL SLEEVE WITHIN WHICH ONE END OF THE VALVE MEMBER IS DISPOSED, SAID SLEEVE BEING DISPOSED IN AND HELICALLY MOVABLE RELATIVE TO A CYLINDRICAL BORE IN THE VALVE FIXED RELATIVE TO SAID HOUSING, THE SLEEVE HAVING A PLURALITY OF PERIPHERALLY SPACED HOLES THERETHROUGH IN REGISTRY WITH AN ANNULAR GROOVE ABOUT SAID END OF THE VALVE MEMBER, AND A BALL IN EACH SAID HOLE, EACH BALL BEING OF A DIAMETER GREATER THAN THE DISTANCE FROM THE INNER WALL OF THE VALVE BORE TO THE INNER WALL OF THE SLEEVE THEREBY TO ASSURE THAT THE INNER WALL OF THE BORE SERVES AS A KEEPER TO MAINTAIN THE BALL IN THE HOLES AND IN THE GROOVE SO THAT HELICAL MOVEMENT OF THE VALVE ACTUATOR CAN MOVE THE VALVE MEMBER AXIALLY WITHOUT NECESSARILY TURNING THE VALVE MEMBER, SAID CYLINDRICAL BORE HAVING A CYLINDRICAL SURFACE EXTENDING A SUBSTANTIAL DISTANCE IN BOTH DIRECTIONS FROM SAID BALLS.