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专利名称：Load lifting device发明人：Joseph C. Rockwood申请号：US07/913033申请日：19920714公开号：US05245940A公开日：19930921
摘要：A load lifting device for small watercraft has a vertical post having a lower postportion extending downwardly in the water from the top of the dock and rigidly
mounted thereto and having an upwardly extending rectilinear extension and a verticallymoveable cradle cantilevered off the post with a winch at the top of the extensionconnected to the cradle for raising and lowering it; the upwardly extending extension ofthe post being mounted on the lower post portion for rotation relative thereto so thatwhen the cradle is moved vertically to a position carried by the extension it may revolvewith such extension to swing a watercraft carried by the cradle over the dock or thewater as desired. A lock is provided for preventing the post and extension from rotatingduring transition of the cradle between the two.
申请人：ROCKWOOD; JOSEPH C.
代理机构：Brooks & Kushman
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