One shot clutch

Claim 1

A POWER TOOL FOR DRIVING THREADED FASTENERS AND THE LIKE, SAID TOOL COMPRISING: (A) A TOOL BODY; (B) A MOTOR IN SAID BODY; (C) A TOOL SPINDLE IN SAID BODY ADAPTED TO DRIVE A FASTENER; (D) A PAIR OF ROTATABLY MOUNTED CLUTCH MEMBERS IN SAID BODY BETWEEN SAID SPINDLE AND SAID MOTOR FORMING A CLUTCH MECHANISM FOR INTERCONNECTING SAID MOTOR TO SAID SPINDLE; (E) SAID CLUTCH MEMBERS BEING RELATIVELY MOVABLE IN AN AXIAL DIRECTION AND EACH HAVING A TRANSVERSELY EXTENDING FACE FACING THE FACE ON THE OTHER CLUTCH MEMBER; (F) BIASING MEANS URGING SAID CLUTCH MEMBERS AND THEIR FACES AXIALLY TOGETHER; (G) A KEY BALL RESILIENTLY HELD BETWEEN THE FACES OF SAID CLITCH MEMBERS BY SAID BIASING MEANS; (H) A GROOVE LOCATED IN THE FACE OF EACH CLUTCH MEMBER AND RECEIVING A PORTION OF SAID KEY BALL, EACH GROOVE EXTENDING BETWEEN A CLUTCH-RELEASED POSITION OF SAID KEY BALL AT THE AXIS OF ROTATION OF ITS CLUTCH MEMBER AND A CLUTCH-ENGAGED POSITION OF SAID KEY BALL SPACED RADIALLY FROM THE AXIS OF ROTATION OF THE CLUTCH MEMBER AND SHAPED AFOR SAID KEY BALL TO ROLL ALONG THE GROOVE BETWEEN SAID POSITIONS; AND (I) AT LEAST ONE OF SAID GROOVES EXTENDING ALONG A CURVED PATH BETWEEN SAID CLUTCH-ENGAGED AT THE CLUTCHRELEASED FROM SAID CLUTCH-ENGAGED POSITION TO SAID CAMMED FROM SAID CLUTCH-ENGAGED POSITION TO SAID CLUTCH-RELEASED POSITION BY A PREDETERMINED TORQUE LOAD ON SAID CLUTCH MEMBERS.