Traction instrument for a dental matrix band

Claim 1

IN A TRACTION INSTRUMENT FOR A DENTAL MATRIX BAND; (A) PROXIMAL AND REMOTE SLOTTED HEADS MOUNTED FOR MOVEMENT TOWARD AND AWAY FROM ONE ANOTHER; (B) EACH OF THE SLOTTED HEADS DEFINING A SLOT IN WHICH OVERLAPPED END PORTIONS OF A LOOPED MATRIX BAND MAY BE POSITIONED, WITH THE LOOP OF THE BAND PROJECTING FROM THE PROXIMAL SLOTTED HEAD; (C) THE PROXIMAL SLOTTED HEAD BEING ADAPTED TO BE ARRANGED ADJACENT TO THE LOOP; (D) THE REMOTE SLOTTED HEAD BEING ADAPTED TO HAVE OUTER TERMINAL ENDS OF THE OVERLAPPED END PORTIONS OF THE BAND ANCHORED THERETO; (E) A LONGITUDINAL OPERATING SPINDLE HAVING FRONT AND REAR BLOCKS SUPPORTED THEREON, AT LEAST ONE OF THESE BLOCKS BEING THREADED ON THE SPINDLE, WHEREBY THE BLOCKS MAY BE MOVED TOWARD AND AWAY FROM ONE ANOTHER WHEN THE SPINDLE IS ROTATED; (F) TWO PAIRS OF TOGGLE LINKS ARRANGED TO PROVIDE A SUBSTANTIALLY DIAMOND-SHAPED FRAME, WITH ONE PAIR OF TOGGLE LINKS BEING DISPOSED ON EACH LATERAL SIDE OF THE OPERATING SPINDLE; (G) THE OUTER ENDS OF THE TOGGLE LINKS BEING SWINGABLY SECURED TO THE BLOCKS, AND THE INNER ENDS OF EACH PAIR OF TOGGLE LINKS BEING SWINGABLY SECURED TO ONE ANOTHER; (H) EACH SLOTTED HEAD BEING SECURED TO THE INNER ENDS OF ONE PAIR OF THE TOGGLE LINKS, AND THE SLOTTED HEADS BEING DISPOSED AT OPPOSITE APEXES OF THE DIAMONDSHAPED FRAME, WHEREBY THE SLOTTED HEADS MAY BE SPREAD APART BY ROTATING THE SPINDLE.