公开(公告)号：US4133411A

公开(公告)日：1979-01-09

申请号：US767828

申请日：1977-02-11

申请人： Walter R. Curb

发明人： Walter R. Curb

IPC分类号： B66C23/693 ,  B66F11/04

CPC分类号： B66F11/046

摘要： An extension and retraction mechanism for a three section extensible boom is disclosed utilizing an internally disposed hydraulic cylinder connected between a stationary boom section and an intermediate boom section with a cable connection located entirely interior of the boom having opposite ends anchored to opposite ends of the stationary section with the cable routed around sheaves on the moving end of the hydraulic cylinder and a base end of the intermediate boom section with a cable attachment to the base end of the inner boom section, the inner boom section being the most extensible boom section.

摘要翻译： 公开了一种用于三段可伸缩臂的延伸和缩回机构，其利用内部设置的液压缸连接在固定悬臂部分和中间悬臂部分之间，液压缸具有位于悬臂的整个内部的电缆连接件，该悬臂具有相对的端部，锚固到固定的相对端 所述电缆布置在所述液压缸的移动端上的滑轮周围，并且所述中间悬臂部分的基端具有连接到所述内部悬臂部分的所述基端的电缆，所述内部悬臂部分是所述可伸缩臂部分。