Patent ID: 7604450
Filing Date: 2009-10-20
Classification: B66C

Abstract:
1. A portable hoist assembly for attachment to a trailer hitch drawbar having a horizontal drawbar axis, comprising a pivot bar with a first portion adapted for releasable attachment to a trailer hitch drawbar and a cylindrical second portion at and coaxial with the drawbar, a lower collar with a first opening releasably receiving the pivot bar second portion and a second opening orthogonal to the first opening, the lower collar being rotatable on the pivot bar, a mast orthogonal to the pivot bar releasably connectable at its lower end to the lower collar at its second opening and rotatable with the lower collar on the pivot bar about the drawbar axis at the trailer hitch drawbar between horizontal and vertical positions therein enabling the portably hoist assembly to be assembled with the mast horizontal and then rotated on the pivot bar to a mast vertical position, a friction bearing dividing the mast with a mast upper portion rotatable on the friction bearing about a mast longitudinal axis that intersects the pivot bar near the drawbar, a boom with a proximal end releasably connects orthogonally to the mast at a mast upper end, a winch with a winch line, at least one pulley conducting the winch line from the winch to a boom arm distal end with the winch line hanging from the boom arm distal end for attachment to a load.