发明名称 Combined hand truck and ladder
摘要 A combined hand truck and ladder having a frame with a pair of elongated side rails and longitudinally spaced interconnecting cross braces. An upper back frame member is pivotally connected at one end to the upper end of the frame and is pivotally movable from locked positions parallel to the frame to an extended 90 DEG angle positions. The pivotally connected end is spaced a short distance from the end of the frame so that when the frame is inverted, an angled support provides a freely supported ladder. The frame member also has lower wheels and an extended support foot to be used in the hand truck mode.
申请公布号 US4106590(A) 申请公布日期 1978.08.15
申请号 US19770779334 申请日期 1977.03.21
申请人 LORDS III RESEARCH & DEVELOPMENT CO. 发明人 TARRAN, PHIL KEITH
分类号 B62B1/00;B62B1/12;(IPC1-7):B62B1/20 主分类号 B62B1/00
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