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245 条记录 (耗时 0.012 秒)

    Self-aligning tensioner
    46.
    发明授权
    Self-aligning tensioner 失效
    自调音张紧器

    公开(公告)号：US3679173A

    公开(公告)日：1972-07-25

    申请号：US3679173D

    申请日：1970-08-06

    申请人： DIAMOND POWER SPECIALITY

    发明人： SHERRICK RONALD E ,  SINGLETON JOHN C

    IPC分类号： B25B29/02 ,  B25B21/00

    CPC分类号： B25B29/02 ,  Y10T29/5383

    摘要： A hydraulic tensioner for preloading threaded studs or bolts has a cylinder and piston assembly at the top with a spherically concaved bottom surface overlying a matching spherically convex top surface of the supporting pedestal. Said assembly is held spaced above the pedestal by counterbalancing springs when the tensioner is unloaded but is pulled down to engage said surfaces when the tensioner is loaded. Said assembly and the drawbar, engagement nut and related components are angularly movable.

    摘要翻译： 用于预加载螺柱或螺栓的液压张紧器在顶部具有气缸和活塞组件，其具有覆盖支撑基座的匹配的球形凸起顶表面的球形凹面底面。 当张紧器被卸载时，所述组件通过平衡弹簧保持在基座上方间隔开，但是当张紧器被装载时被拉下以接合所述表面。 所述组件和牵引杆，接合螺母和相关部件可成角度地移动。

    Anticreep hydraulic positioning system
    47.
    发明授权
    Anticreep hydraulic positioning system 失效
    防止液压定位系统

    公开(公告)号：US3568570A

    公开(公告)日：1971-03-09

    申请号：US3568570D

    申请日：1969-03-05

    申请人： DIAMOND POWER SPECIALITY

    发明人： WINDERS GORDON R

    IPC分类号： F15B15/14 ,  F15B13/04 ,  F01B25/04

    CPC分类号： F15B15/149 ,  F15B15/1447

    摘要： A hydraulically actuatable piston which is subjected to a constant bias (e.g. gravity) in a direction opposite to that in which it is movable under hydraulic pressure is provided with means for accurately maintaining a stationary piston positioning under hydrostatic pressure despite leakage past the piston by a metering valve actuatable by differential movement between the piston and cylinder, fluid being constantly supplied to the underside of the piston and metered past the valve.