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公开(公告)号:US5318387A
公开(公告)日:1994-06-07
申请号:US850927
申请日:1992-03-13
申请人: Frans R. P. Pienaar , Graham H. Clarke , Brian P. Lewis , Mark Howell , Richard G. King , Peter J. Cook
发明人: Frans R. P. Pienaar , Graham H. Clarke , Brian P. Lewis , Mark Howell , Richard G. King , Peter J. Cook
摘要: The yieldable load support comprises a compressible support member in the form of an elongate timber pole. The load support or pole is asymmetrically modified at or near one end thereof in a manner to positively induce sideways brushing of the pole at the modified end, in a preferential direction transverse to the length of the pole, when the support member is placed under longitudinal compressive load of sufficient magnitude.
摘要翻译: 可屈服的负载支撑件包括细长木杆形式的可压缩支撑构件。 负载支撑件或电极在其一端处或其一端处被不对称地修改,以便当支撑构件被放置在纵向下时,以横向于极的长度的优先方向积极地引导在修改端处的极的侧向刷洗 压缩载荷足够大。
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公开(公告)号:US5149228A
公开(公告)日:1992-09-22
申请号:US721268
申请日:1991-06-26
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。
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