Pressure fluid operated percussion tools
    1.
    发明授权
    Pressure fluid operated percussion tools 失效
    压力流体操作冲击工具

    公开(公告)号:US4036108A

    公开(公告)日:1977-07-19

    申请号:US612915

    申请日:1975-09-12

    CPC classification number: B25D9/26 F01L27/04

    Abstract: In a percussion tool a means is provided for delaying the manifestation, on a valve means sensitive to such change in pressure, of a change in pressure of the fluid applied to the hammer piston at one end thereof and which drives such hammer piston in its working stroke, the valve means being that means which serves to control the inlet and exhaust parts of the fluid circuit which applies pressure to the other end of the piston.

    Abstract translation: 在打击乐器中,提供了一种装置,用于延迟对在这种压力变化敏感的阀装置上的表现,该压力变化在其一端施加到锤式活塞的流体的压力变化,并且在其工作状态下驱动该锤式活塞 阀门装置是用于控制向活塞的另一端施加压力的流体回路的入口和排气部分的装置。

    Mine roof support control systems
    3.
    发明授权
    Mine roof support control systems 失效
    矿山屋顶支撑控制系统

    公开(公告)号:US4050256A

    公开(公告)日:1977-09-27

    申请号:US635148

    申请日:1975-11-25

    CPC classification number: E21D23/12

    Abstract: A control system for a self-advancing mine roof support includes function selection hydraulic valve means responsive to coded electrical signals from remote means for selecting a desired function, and means for comparing the coded signals with other signals representing the instantaneous function state of the valve means. Usually each of a plurality of supports incorporates the remote means of a neighboring support.

    Abstract translation: 一种用于自行推进的矿山屋顶支撑的控制系统包括响应于来自遥控装置的编码电信号用于选择所需功能的功能选择液压阀装置,以及用于将编码信号与表示阀装置的瞬时功能状态的其它信号进行比较的装置 。 通常,多个支撑件中的每一个都包括相邻支撑件的远程装置。

    Glands
    4.
    发明授权
    Glands 失效
    腺体

    公开(公告)号:US3940151A

    公开(公告)日:1976-02-24

    申请号:US592457

    申请日:1975-07-02

    CPC classification number: F16J15/185 F16J15/48

    Abstract: A gland seal arrangement for effecting a fluid seal between two relatively movable parts wherein the loading applied to an annular sealing member in contact with such parts is derived from a coaxially arranged, sleeve-like thrust member sensitive to the pressure of the fluid being sealed so that with increasing fluid pressure the loading applied to the sealing member is correspondingly increased.

    Abstract translation: 用于在两个相对可移动部件之间实现流体密封的压盖密封装置,其中施加到与这些部件接触的环形密封构件的负载来自同轴布置的套筒状推力构件,其对被密封的流体的压力敏感。 随着流体压力的增加,施加到密封构件的载荷相应地增加。

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