Tapered hinge pin assembly and removal means

Claim 1

In a hinge structure comprising a bifurcated member defining a pair of arms, an intermediate member located between said arms of the bifurcated member, means defining a bore through each arm and said intermediate member, said bores being in concentric alignment, a hinge pin in said bores having a generally cylindrical center portion fitted within the bore in said intermediate member and having tapered end portions, which tapered end portions are within and spaced from the bores of said arms, a generally cup-shaped collar defining generally cylindrical sidewalls and an end wall fitted within each of the arm bores, the interior wall of the collars being tapered so as to be in engagement with the tapered end portions of said hinge pin, said tapered walls containing a plurality of axially entending slots, axially disposed threaded bores in each end of said hinge pin, an end wall opening formed through the end wall of each collar, said opening being in concentric alignment with a respective hinge pin bore, said axially disposed threaded bores adapted to receive first bolt means passing through each end wall bore in spaced relation thereto and threadedly engaged in a respective hinge pin bore and having head means thereon for contacting a respective collar end wall whereby said collar is drawn toward said hinge pin so as to wedge the end portions thereof in respective arm bores when the first bolt means is tightened, and further including threads formed within each collar end wall opening so as to permit a second bolt means to be engaged therewith subsequent to removal of said first bolt means thereby facilitating removal of said collar.