Patent ID: 7117573

Claim:
A puller comprising a threaded rod, a drive mechanism receiving the threaded rod and an activation mechanism threadedly engaged with the threaded rod; the threaded rod having a working nut disposed at its upper end and a centering end at an opposing end of the threaded rod to engage a work piece at an axis thereof; the drive mechanism containing a puller and a winged nut, the puller having a head and multiple arms extending downwardly from the head, the head having an opening through which the threaded rod passes, the winged nut being disposed in the opening and being fastened to the threaded rod; the activation mechanism including a connecting base and a bolting base, the connecting base being respectively fixed to the multiple arms of the puller and threadedly engaged with the threaded rod; the connecting base having three connecting arms extending outwardly from a central portion of the connecting base in equal angularly spaced relationship one from another, and an auxiliary connecting arm extending from the central portion of the connecting base in a direction diametrically opposed to one of the three connecting arms; the bolting base being threadedly engaged to the threaded rod to be displaceably disposed between the head of the puller and the connecting base, the bolting base having three fixed arms extending outwardly from a central portion thereof and in angular correspondence with the three connecting arms; the bolting base having an auxiliary fixed arm extending outwardly from the central portion of the bolting base and in angular correspondence with the auxiliary connecting arm, a length of each of the three fixed arms being greater than a length of the three connecting arms extending from the connecting base, and a length of the auxiliary fixed arm being greater than a length of the auxiliary connecting arm; a plurality of jaws selectively respectively connected to the three connecting arms and the three fixed arms or one of the plurality of jaws being selectively connected to the auxiliary fixed arm and the auxiliary connecting arm and another of the jaws being connected to the diametrically opposed connecting arm and corresponding fixed arm, each jaw being pivotally connected to a distal end of a respective fixing arm of the bolting base and an activation arm being pivotally coupled between an intermediate portion of the jaw and a distal end of a corresponding connecting arm extending from the connecting base.