enlarged head that threads into a threaded opening 84 in the bracket 54 referring to fig1 and 11 the upper door hinge assembly 16 has an upper pivot bracket 86 that mounts to the front face of the cabinet 12 by three bolts the bracket 86 includes an opening 88 in which a hinge pin 90 is inserted along the pivot axis to fit within an opening 92 in a handle 94 at the top of the door 14 the pin 90 has an enlarged threaded head that threads into the opening 88 to secure it to the bracket 86 the bracket 86 is spaced a distance from the top of the handle to allow the door 14 to float between the upper 86 and lower 54 brackets and be raised and lowered as needed when being opened and closed as mentioned this arrangement helps to close the door 14 specifically as the door 14 is opened from the closed position it pivots about the pivot axis extending through the hinge pins 82 and 90 this causes the upper cam 60 to rotate with respect to the lower cam 62 as it does opposing ramp surfaces 68 and 69 engage and cause upward axial translation of the upper cam 60 and thus the door.