Tool for dilating elastic rings and tubes

Claim 1

A TOOL FOR DILATING ARTICLES SUCH AS ELASTIC RINGS AND TUBES, CHARACTERIZED BY: A. A PAIR OF COAXIAL ANNULAR DISC-LIKE MEMBERS, ONE OF SAID MEMBERS PROVIDING A LEVER MOUNTING DISC AND THE OTHER PROVIDING A LEVER ACTUATING DISC; B. MEANS CONNECTING SAID MEMBERS TOGETHER IN FLATWISE JUXTAPOSITION AND CONSTRAINING THEM TO RELATIVE ROTARY MOTION ABOUT THEIR AXIS; C. A NUMBER OF SUBSTANTIALLY IDENTICAL LEVERS SLIDABLY CONFINED BETWEEN THE DISCS AND PIVOTALLY CARRIED BY THE LEVER MOUNTING DISC FOR SWINGING MOTION ABOUT AXES WHICH ARE EQUISPACED RADIALLY FROM SAID CIRCUMFERENTIALLY ABOUT THE DISC AXIS AND PARALLEL THERETO, SAID LEVERS EXTENDING INWARDLY FROM THEIR PIVOTS BEYOND THE EDGE OF THE CENTRAL HOLE IN ONE OF THE DISCS, AND HAVING FINGERS WHICH PROJECT AXIALLY THROUGH SAID HOLE; D. AND MEANS CONNECTING THE LEVERS WITH THE LEVER ACTUATING DISC AT LOACTIONS SPACED EQUAL DISTANCES FROM THEIR PIVOTS, AND OPERABLE UPON ROTARY MOVEMENT OF EITHER DISC RELATIVE TO THE OTHER TO SIMULTANEOUSLY IMPART SWINGING MOTION TO ALL OF SAID LEVERS TO EFFECT EITHER IRIS-LIKE DILATING OR CONTRACTING MOVEMENT TO THE FINGERS ON THE INNER ENDS OF THE LEVERS DEPENDING UPON THE DIRECTION OF SUCH RELATIVE ROTARY MOTION OF THE DISCS, WHEREBY AN ELASTIC TUBE OR RING ENCIRCLING THE FINGERS CAN BE DILATED IN CONSEQUENCE OF RELATIVE ROTARY MOTION OF THE DISCS IN ONE DIRECTION.