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    Roof support suitable for use in mines
    4.
    发明授权
    Roof support suitable for use in mines 失效
    屋顶支撑适用于矿山

    公开(公告)号：US4548527A

    公开(公告)日：1985-10-22

    申请号：US622844

    申请日：1984-06-21

    申请人： Christopher J. Bishop ,  Geoffrey M. Cumner ,  John H. Waters

    发明人： Christopher J. Bishop ,  Geoffrey M. Cumner ,  John H. Waters

    IPC分类号： E21D17/02 ,  E21D17/05 ,  E21D17/054 ,  E21D23/06 ,  E21D15/14

    CPC分类号： E21D23/066 ,  E21D17/02

    摘要： A roof support suitable for use in mines comprises a main roof-supporting structure, a cantilever carried by the structure, an actuator and a link member through the intermediary of which the actuator is connected to one end portion of the cantilever for moving the cantilever between retracted and extended positions. The end portion of the cantilever has projections which come into engagement with an abutment when, upon advancing movement of the actuator, the cantilever reaches its fully extended position. The abutment and projections are so shaped that when they are in engagement they form pivot means about which the cantilever can be tilted. The link member is so formed and so connected to the cantilever that upon further advancing movement of the actuator the cantilever is caused to tilt about the pivot means into a roof-supporting position.

    摘要翻译： 适用于矿山的屋顶支撑件包括主屋顶支撑结构，由结构承载的悬臂，致动器和连杆构件，通过该连杆构件将致动器连接到悬臂的一个端部，以使悬臂在 缩回和延伸位置。 悬臂的端部具有与基座接合的突起，当在致动器的前进运动时，悬臂到达其完全伸出的位置。 邻接和突起的形状是这样的，使得当它们处于啮合状态时，它们形成枢转装置，悬臂可围绕该枢转装置倾斜。 连杆构件如此形成并且连接到悬臂，当致动器进一步前进运动时，使悬臂绕枢轴装置倾斜成屋顶支撑位置。

    Mine roof supports
    5.
    发明授权
    Mine roof supports 失效
    矿山屋顶支援

    公开(公告)号：US3754402A

    公开(公告)日：1973-08-28

    申请号：US3754402D

    申请日：1971-06-23

    申请人： FLETCHER SUTCLIFFE WILD LTD

    发明人： BEAUMONT SMITH D

    IPC分类号： E21D17/02 ,  E21D23/00 ,  E21D23/06 ,  E21D15/45

    CPC分类号： E21D23/06 ,  E21D17/02 ,  E21D23/0013

    摘要： A support means for a cantilever of a mine roof support which cantilever includes two spaced parallel arms, comprising a bar located transversely of and beneath said two arms and adapted to urge said arms upwardly towards the mine roof, said bar being pivoted at approximately its mid-length about an axis parallel to the axes of said two arms, and means to urge said pivot bar upwardly, whereby said arms are able to extend upwardly to different extents due to the pivoting of said pivot bar.

    摘要翻译： 用于矿顶支撑件的悬臂的支撑装置，该悬臂包括两个间隔开的平行臂，其包括位于所述两个臂的横向和下方的杆，并且适于将所述臂向上推向矿顶，所述杆大约在其中部 - 围绕平行于所述两个臂的轴线的轴线的长度，以及用于向上推动所述枢转杆的装置，由此所述臂能够由于所述枢转杆的枢转而向上延伸到不同的程度。