Assembly for incremental rotation of a linear motion valve piston

Claim 1

IN COMBINATION WITH A LINEAR MOTION VALVE COMPRISING A PISTON MEMBER, FITTED WITH RINGS, RECIPROCATING WITHIN A VALVE BODY FOR CONTROLLING FLOW THROUGH A FLUID PASSAGE FORMED IN SAID BODY HAVING AT LEAST ONE PORT, APPARATUS TO REDUCE RING WEAR WHICH COMPRISES, IN COMBINATION, A COUPLING SHAFT AFFIXED TO AND COAXIAL WITH SAID RECIPROCATING PISTON MEMBER, A ONE-WAY CLUTCH HAVING AN INNER DRIVEN MEMBER ATTACHED TO SAID COUPLING SHAFT AND A CYLINDRICAL OUTER DRIVING MEMBER ROTATING SAID INNER MEMBER IN ONE DIRECTION OF ROTARY MOVEMENT AND HAVING A NON-DRIVE RELATIONSHIP IN THE OPPOSITE DIRECTION, A PIN MOUNTED ON SAID OUTER MEMBER, A BRACKET RIGIDLY AFFIXED TO SAID VALVE BODY, SAID BRACKET HAVING A CYLINDRICAL FACE AND CONTAINING A CURVED KEYWAY CUT INTO SAID CYLINDRICAL FACE, SAID PIN BEING GUIDED BY SAID CURVED KEYWAY UPON VALVE ACTUATION AND AXIAL MOVEMENT OF SAID CLUTCH TO IMPART A ROTARY MOVEMENT TO SAID DRIVING MEMBER UPON AXIAL MOVEMENT OF SAID CLUTCH IN ONE DIRECTION, SAID ROTARY MOVEMENT BEING TRANSMITTED TO THE PISTON MEMBER VIA SAID COUPLING SHAFT, AXIAL MOVEMENT OF SAID CLUTCH IN THE OPPOSITE DIRECTION IMPARTING NO ROTARY MOVEMENT TO THE DRIVEN MEMBER OR PISTON MEMBER, WHEREBY RECIPROCAL VALVE ACTUATION RESULTS IN INCREMENTAL ROTATION OF SAID PISTON MEMBER.