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    • 17. 发明授权
    • Hydraulic counterweight and shock-absorbing system
    • 液压配重和减震系统
    • US4091897A
    • 1978-05-30
    • US809670
    • 1977-06-24
    • John S. Andrepont
    • John S. Andrepont
    • F16F9/00B63B21/60B63B22/02F16F9/28F16F9/22
    • B63B21/60F16F9/28
    • A hydraulic counterweight and shock-absorbing system for unbalanced loads comprises a hydraulic cylinder having a reciprocable piston attached to a rod which controls the position of the load. The hydraulic cylinder is filled with a hydraulic liquid and is provided with a valved by-pass conduit which is selectively operable to permit free movement of the piston in a "free-wheeling" mode. An accumulator partially filled with hydraulic liquid under a high-pressure gas phase is operatively connected to the rod end of the cylinder to provide a shock-absorbing function during a "hook-up" mode. In a "disconnect" mode, by-pass conduits provided with a check-valve and with a relief or pressure-controlled valve permit unimpeded upward movement of the load in response to an external applied force, but prevent downward movement of the load except on application of a force exceeding the weight of the load.
    • 用于不平衡载荷的液压配重和减震系统包括液压缸,其具有附接到杆的可往复运动的活塞,该活塞可控制负载的位置。 液压缸装有液压液体,并设置有一个带阀的旁通管道,该​​管道可选择性地操作以允许活塞以“续流”模式自由移动。 在高压气相部分充满液压液体的蓄能器可操作地连接到气缸的杆端,以在“连接”模式下提供减震功能。 在“断开”模式中,设有止回阀和泄压或压力控制阀的旁通管道响应于外部施加的力量而允许负载不受阻碍地向上运动,但是防止负载向下移动,除了 施加超过负载重量的力。