Patent ID: 7607513
Filing Date: 2009-10-27
Classification: E04G

Abstract:
1. A lifting hand truck comprising: a pair of parallel rectangular tubular member, spaced horizontally from each other by a tubular cross member extending between and welded directly to the tops of the pair of parallel members; wherein each of the pair of parallel members further comprise a telescoping portion such that the parallel members may be extended longitudinally, and wherein the cross member further comprises a first telescoping arm within the cross member and a second telescoping arm within the first telescoping arm, each of the first and second telescoping arms extending outwardly from opposite ends of the cross member; the pair of parallel members further comprising a telescoping stabilizing bar coupled to each end of the pair of parallel members, wherein each of the telescoping stabilizing bars include a leveling foot attached to each end of the telescoping bars; a vertical plate welded directly to the cross member and a motor secured directly to the vertical plate; a first pair of vertical posts connected to the pair of parallel rectangular tubular members; wherein one of the vertical posts of the pair is welded to one of the pair of parallel rectangular tubular members, and the other of the vertical posts is welded to the other of the parallel rectangular tubular members; a second pair of vertical posts, slidably coupled to the outside of the first pair of vertical posts; a third pair of vertical posts, slidably coupled to the outside of the second pair of vertical posts; a fourth, uppermost, pair of vertical posts, slidably coupled to the outside of the third pair of vertical posts; each of the posts of the first, second, third and fourth pairs of vertical posts having a unshaped cross section such that the second posts are fitted around the first posts and the fourth posts are fitted around the third posts which are fitted around the second posts; wherein the pairs of posts are slidably operated by a plurality of pulleys and cables attached to the inside of the vertical posts and coupled to connecting sprockets and axle of the motor; the first, second and third pairs of vertical posts each having blocks disposed on the upper portions of their outer surfaces of the pairs of posts, the blocks acting as stops when internal blocks that are disposed on the internal surfaces of the lower portions of the second, third and fourth pairs of vertical posts respectively are slid upwardly and abut against the externally disposed blocks, limiting the extension of the posts; a first main rectangular platform extending between the fourth pair of vertical posts; each of the uppermost posts having a Y-shaped bracket attached thereto; each of the Y-shaped brackets further comprising a lower portion extending vertically and two upper portions extending upward and away from each other so as to form a Y-shape, each of the Y-shaped brackets comprising a pair of pivot pins on their lowermost portions, and a pair of shackles on their uppermost portions; a second rectangular platform pivotally connected by the pivot pins to the bottom portion of the Y-shaped brackets on one side of the first main platform; and a third rectangular platform pivotally connected by the remaining pivot pins to the bottom portion of the Y-shaped brackets on the other side of the first main platform opposite the second platform such that the first main platform has one pivotally connected platform on either side; each of the Y-shaped brackets further comprising supporting chains that extend from the shackles on the uppermost portions of the Y-shaped brackets, downward to the midpoints of the second and third rectangular platforms; and wherein the second and third rectangular platforms further comprise modular, collapsible railings; the modular collapsible railings being connectable to three sides each of the second and third platforms by a plurality of hinge brackets.