Patent ID: 7682032

Claim:
A bearing apparatus for pivoting a carrying arm relative to an anchorage having a proximal end and a distal end, the bearing apparatus comprising: a bushing carried by the distal end of the carrying arm attached to the bushing such that the bushing is disposed between the carrying arm and the distal end; a pivot bearing assembly movably disposed in the bushing and configured to pivotably control the carrying arm, a portion of the pivot bearing assembly configured to slidingly engage a section of the bushing such that the carrying arm pivots when the portion engages the section; the pivot bearing assembly has a shaft with a first end and a second end and the portion is a come-along part movably disposed about the shaft, the first end in rotational communication with the carrying arm, the second end configured to be rotationally driven by a drive apparatus, the shaft configured to rotationally engage the come-along part, the come-along part configured to move axially of the shaft to slidingly engage the section upon rotation of the shaft; and a transfer plate removably attached to an area of the carrying arm and to the bushing proximate the first end, the transfer plate configured to transfer rotational movement of the control component to pivot the carrying arm.