Lifting gear for construction site - fits on existing vertical post and rotates with telescopic jib and lifting tackle
Реферат: The lifting beam consists of two articulated assemblies; a base to support a pivoted column (1) and a jib on which the lifting gear is suspended. The column (2) is vertical, with the bottom solid with a base (3). On this, turning between stops (16, 17) is a column with a jib (8a) and extension (9). The extension can move horizontally and carries a lifting block in various positions (11, 12, 14). The base is joined by four bolts to a vertical post and has stops to limit rotation. The post employed can be one that already exists on the construction site.
Mobile crane with telescopic boom and jib and method for connecting the latter
Номер патента: US3831771A. Автор: D Wiencek. Владелец: Harnischfeger Corp. Дата публикации: 1974-08-27.