Prop preloading apparatus
    2.
    发明授权
    Prop preloading apparatus 失效
    支撑预压装置

    公开(公告)号:US5149228A

    公开(公告)日:1992-09-22

    申请号:US721268

    申请日:1991-06-26

    IPC分类号: E21D15/48 E21D15/55

    CPC分类号: E21D15/483 E21D15/55

    摘要: The prop preloading apparatus comprises a frame and means for supporting the frame on an end of an elongate prop in a manner permitting at least limited swivelling movement of the frame relative to the prop about at least one axis transverse to the axis of the prop. The apparatus also includes a flexible preload bag which is inflatable with a settable substance and which is dimensioned to be supported by the frame.

    摘要翻译: 支架预加载装置包括框架和装置,用于以允许框架相对于支柱至少有限的旋转运动的方式将框架支撑在细长支架的端部上,该框架围绕至少一个轴线相对于支柱的轴线。 该装置还包括柔性预加载袋,其可用可固化物质充气并且其尺寸被框架支撑。