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    SLEEVE HOLDER FOR A HYDRAULIC CYLINDER
    1.
    发明申请
    SLEEVE HOLDER FOR A HYDRAULIC CYLINDER 审中-公开

    公开(公告)号：US20170108016A1

    公开(公告)日：2017-04-20

    申请号：US15300581

    申请日：2015-03-27

    申请人： Caterpillar Global Mining Europe GmbH

    发明人： Christian KNOBLICH ,  Lothar MARKOWSKI ,  Sabine FIGGE ,  Jaroslaw WERNER

    IPC分类号： F15B15/14 ,  E21D15/51 ,  F15B15/16

    CPC分类号： F15B15/1438 ,  E21D15/15 ,  E21D15/44 ,  E21D15/51 ,  E21D15/56 ,  F15B15/1461 ,  F15B15/16

    摘要： A hydraulic cylinder is disclosed. The hydraulic cylinder may have an outer cylindrical tube including an open end, a first female threaded portion, and a second female threaded portion. The hydraulic cylinder may also have a movable element received in the outer cylindrical tube through the open end. Further, the hydraulic cylinder may have a sleeve holder engaged with the first female threaded portion to seal an annular space between the outer cylindrical tube and the movable element. The sleeve holder may have a first male threaded portion mating with the first female threaded portion. In addition, the hydraulic cylinder may have a locking ring engaged with the second female threaded portion to secure the sleeve holder to the outer cylindrical tube. The locking ring may have a second male threaded portion mating with the second female threaded portion.

    SUPPORT PROP
    2.
    发明申请
    SUPPORT PROP 审中-公开
    支持建议

    公开(公告)号：US20140072374A1

    公开(公告)日：2014-03-13

    申请号：US13651926

    申请日：2012-10-15

    申请人： ELBROC MINING PRODUCTS (PTY) LTD

    发明人： Grant ROACH ,  Graeme CHALMERS

    IPC分类号： E21D15/51 ,  E21D15/44

    CPC分类号： E21D15/512 ,  E21D15/43 ,  E21D15/44

    摘要： A support prop which includes telescopically interengaged inner and outer tubular members, a one-way valve for introducing pressurized liquid into a volume inside at least one of the members, a pressure relief valve for releasing liquid from the volume when the liquid pressure in the volume exceeds a predetermined value and a number of wedges which are located between opposing surfaces of the tubular members and which are engaged with one member and which deform the inner member when telescopic yielding action of the members takes place.

    摘要翻译： 包括可伸缩地相互接合的内管状构件和外管状构件的支撑支撑件，用于将加压液体引入至少一个构件内的容积内的单向阀，当容积中的液体压力时释放液体的压力释放阀 超过预定值和多个楔形件，其位于管状构件的相对表面之间并且与一个构件接合并且当构件的伸缩屈服作用发生时使内部构件变形。

    Hydraulically operated unit for roof support
    3.
    发明授权
    Hydraulically operated unit for roof support 失效
    用于屋顶支撑的液压操作单元

    公开(公告)号：US4640650A

    公开(公告)日：1987-02-03

    申请号：US521735

    申请日：1983-08-09

    申请人： Manfred Koppers ,  Karlheinz Bohnes ,  Friedel Amling

    发明人： Manfred Koppers ,  Karlheinz Bohnes ,  Friedel Amling

    IPC分类号： B23P19/02 ,  E21D15/44 ,  E21D15/50

    CPC分类号： B23P19/027 ,  E21D15/44 ,  Y10T29/49945

    摘要： In a hydraulically operated unit, particularly a prop for a support in an underground excavation, a thin-walled tubular jacket is pressed on an inner element which is movable in an outer tubular element so that the tubular jacket has an inner diameter which is determined with a substantial undersizing relative to the outer diameter of the inner element, and the tubular jacket is clamped on the inner element with exceeding of the flow limit of the inner element and only in a plastic expansion condition which exceeds with a reliable distance and elastic deformation region of the tubular jacket and with a sufficient residual springing part.

    摘要翻译： 在液压操作的单元中，特别是用于地下挖掘中的支撑的支柱，薄壁管状夹套被压在内部元件上，该内部元件可在外部管状元件中移动，使得管状护套的内径由 相对于内部元件的外径的实质尺寸较小，并且管状夹套被夹在内部元件上，超过内部元件的流动极限，并且仅在超过可靠距离和弹性变形区域的塑性膨胀条件下 并具有足够的残余弹性部分。

    Hydraulic double telescoping mine prop
    4.
    发明授权
    Hydraulic double telescoping mine prop 失效

    公开(公告)号：US3838625A

    公开(公告)日：1974-10-01

    申请号：US33460573

    申请日：1973-02-22

    申请人： KLOECKNER WERKE AG

    发明人： BELL G ,  GEHRMANN W

    IPC分类号： E21D15/44 ,  F15B15/16 ,  F15B11/18

    CPC分类号： E21D15/44 ,  F15B15/16

    摘要： A hydraulic double telescoping mine prop in which the pressure spaces between the inner prop and the middle prop are hydraulically connected. A back-pressure valve in such connection is controlled by the pressure present in the pressure space of the middle prop. Such valve is unseated mechanically at the end of the inward movement of the middle prop. A spring is interposed between the middle and outer props and acts as a buffer to check movement and prevent unseating of the valve by the weight of the parts alone.