Roll throttle for air operated hand tool

Claim 1

A THROTTLE CONTROL FOR AIR OPERATED HAND TOOLS AND THE LIKE HAVING AN ELONGATED MOTOR HOUSING ADAPTED FOR HOLDING IN THE HAND, AN AXIAL EXTENSION ON SAID HOUSING HAVING AN AIR PASSAGEWAY THEREIN ADAPTED TO BE CONNECTED TO A SOURCE OF AIR UNDER PRESSURE, A VALVE MECHANISM IN SUCH PASSAGEWAY CONTROLLING THE FLOW OF AIR TO SAID MOTOR HOUSING, A TUBULAR MEMBER SURROUNDING SAID EXTENSION AND ADAPTED TO BE ROTATED WITH RESPECT TO SAID HOUSING, AND MEANS RESPONSIVE TO THE ROTATION OF SAID MEMBER ABOUT SAID EXTENSION TO MOVE SAID VALVE MECHANISM THEREBY TO CONTROL THE FLOW OF AIR TO SAID MOTOR HOUSING, SAID VALVE MECHANISM INCLUDING A VALVE STEM MOUNTED FOR MOVEMENT TRANSVERSELY OF SUCH PASSAGEWAY; SAID MEANS COMPRISING A CAM SURFACE ON THE INTERIOR OF SAID MEMBER ENGAGING SAID VALVE STEM EFFECTIVE UPON ROTATION OF SAID MEMBER THROUGH A PRESCRIBED ARC TO CAUSE MOVEMENT OF SAID VALVE STEM TO AN OPEN POSITION, SPRING MEANS RESILIENTLY TO HOLD SAID VALVE STEM AGAINST SAID CAM SURFACE, AND LOCK MEANS FOR SAID VALVE MECHANISM TO HOLD SAID VALVE IN OPEN POSITION.