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    Telescopic tubular prop
    3.
    发明授权
    Telescopic tubular prop 失效
    伸缩管道

    公开(公告)号：US2450374A

    公开(公告)日：1948-09-28

    申请号：US68768146

    申请日：1946-08-01

    申请人： TUBES DE VALENCIENNES & DENAIN

    发明人： GILLET EUGENE CHARLES

    IPC分类号： E21D15/28 ,  E21D15/43 ,  E21D15/58

    CPC分类号： E21D15/43 ,  E04G25/066 ,  E21D15/285 ,  E21D15/581

    摘要： 638,743. Pit props. SOC. ANON. DES TUBES DE VALENCIENNES ET DENAIN. July 8, 1946, No. 20282. Convention date, June 8, 1945. [Class 20 (ii)] [Also in Group XXX] A telescopic pit prop comprises a tubular hood supporting plunger 4, Figs. 2, 3 slotted longitudinally and normally freely sliding in a cylindrical inner bearing means 9, 10 at the upper end of a tubular standard 1, the. plunger 4 being expanded radially into locking engagement with the bearing means 9, 10 by a wedge 11 forced into the slot 5 by a key 12, the slot and wedge being tapered upwardly. Hoop rings 9 and a tubular spacer member 10 form the inner bearing means which is provided with an extension 3 to house the wedge I and key 12, the latter having a pair of flanges one of which engages a slot in the back of the wedge 11 and the other a slot in the extension 3. Accidental withdrawal of the key 12 is prevented by means of a removable cap 13 and a spring-urged cotter pin inserted in a hole in the key. A pin 21, Fig. 3, freely slidable in a boss 20 on the extension 3 has its upper end in contact with the lower edge of an annular flange 8, Fig. 2, of a pivotal cap 6 and serves to measure the penetration of the plunger. In operation the plunger 4 is first brought into engagement with a roof cross-bar by means of a pair of keys 25, Fig. 5 (not shown), which are alternately engaged in staggered slots 26, Fig. 2, in the standard or alternatively a hoisting device, Fig. 6 (not shown), (see Group XXX), may be used.

    Yieldable support prop and method
    6.
    发明授权
    Yieldable support prop and method 有权
    可支撑支撑和方法

    公开(公告)号：US08821075B2

    公开(公告)日：2014-09-02

    申请号：US13317720

    申请日：2011-10-26

    申请人： Clifford A. McCartney ,  Thomas P. O'Donnell

    发明人： Clifford A. McCartney ,  Thomas P. O'Donnell

    IPC分类号： E21D15/28

    CPC分类号： E21D15/285 ,  E21D15/28 ,  Y10T29/49634

    摘要： A yield support prop for a mine includes a first metal tube extending from the mine floor having a first portion having a first outside diameter and a second portion having a second outside diameter. The prop includes a second metal tube that is disposed about the first portion and extends toward the mine roof, when the second tube receives a load from the mine roof, the second portion deforms the second tube and expands the second tube creating resistance against the load from the mine roof. A method for supporting a mine roof. A method for building a yieldable mine prop.

    摘要翻译： 用于矿井的产量支撑支架包括从矿井底部延伸的第一金属管，其具有具有第一外径的第一部分和具有第二外径的第二部分。 支架包括第二金属管，其围绕第一部分设置并且朝向矿顶延伸，当第二管从矿井收到负载时，第二部分使第二管变形并使第二管膨胀，从而产生抵抗负载的电阻 从矿顶。 一种支撑矿山屋顶的方法。 建立可屈服矿山道具的方法。

    Support for underground mining and tunnel construction
    10.
    发明授权
    Support for underground mining and tunnel construction 失效
    支持地下采矿和隧道施工

    公开(公告)号：US6056480A

    公开(公告)日：2000-05-02

    申请号：US221409

    申请日：1998-12-28

    申请人： Theodor Kolk

    发明人： Theodor Kolk

    IPC分类号： E21D15/18 ,  E21D15/28 ,  E21D15/44 ,  E21D25/14 ,  E21D23/04

    CPC分类号： E21D15/18 ,  E21D15/285 ,  E21D15/44

    摘要： There is a support for underground mining and tunnel construction, comprising an outer tube and an inner tube, which can be pushed into each other in a telescoping manner. A piston acted upon by a hydraulic pressure medium is located in the outer tube. This piston, when acted upon by pressure, acts on the inner tube to cause an extension. The outer tube and the inner tube can be fixed on each other by means of a mechanical locking device.

    摘要翻译： 有一个支撑地下采矿和隧道建设，包括一个外管和一个内管，可以伸缩的方式相互推入。 由液压介质作用的活塞位于外管中。 当该活塞作用在压力下时，该活塞作用在内管上以引起延伸。 外管和内管可以通过机械锁定装置彼此固定。