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    • 41. 发明授权
    • Bypass and unloader valve
    • 旁路和卸载阀
    • US4171708A
    • 1979-10-23
    • US790706
    • 1977-04-25
    • Ramon Pareja
    • Ramon Pareja
    • F16K17/04F16K31/363F16K11/00
    • F16K17/0406F16K17/0486F16K31/363Y10T137/2582Y10T137/2605
    • A bypass and unloader valve capable of operation as a full unloader valve or volume control for fluid pressure systems. The structure utilizes a valve body having an inlet, an outlet, and a bypass, with check valve means being provided to accommodate normal flow from the inlet to the outlet. When the pressure rises in the outlet, this pressure is applied against a reciprocatory plunger, and the force generated lifts the plunger, and a stem extension coupled to the plunger unseats a check valve, thereby opening a fluid path from the inlet to the bypass. Improved guide and sealing means are provided for the plunger and associated stem assembly, the plunger and stem being spring biased to accommodate normal flow.
    • 能够作为液压系统的全卸载阀或体积控制的旁通和卸载阀。 该结构使用具有入口,出口和旁路的阀体,其具有止回阀装置以适应从入口到出口的正常流动。 当压力在出口上升时,该压力被施加到往复运动的柱塞上,并且所产生的力提升柱塞,并且连接到柱塞上的杆伸出件卸下止回阀,从而打开从入口到旁路的流体路径。 为柱塞和相关的杆组件提供改进的引导和密封装置,柱塞和杆被弹簧偏置以适应正常流动。
    • 42. 发明授权
    • High-low pressure responsive pilot valve structure
    • 高低压反应式导阀结构
    • US3760845A
    • 1973-09-25
    • US3760845D
    • 1972-09-25
    • ACF IND INC
    • ATKINSON E
    • F16K17/00F16K1/14F16K17/04F16K17/10F16K31/12F16K11/07
    • F16K17/10F16K1/14F16K17/0406F16K17/042F16K17/0473Y10T137/8663
    • A high-low pressure responsive pilot valve structure comprising a valve body having a valve chamber with oppositely facing valve seats thereon. A valve element on one of the valve seats is biased into seated position thereon within the operating pressure range by pressurized control fluid in contact with the valve element and thereby permitting the flow of control fluid through an outlet passage to a valve actuator or the like. Fluid responsive means engage the valve element to move the valve element to the other opposite valve seat in blocking position with respect to the flow of control fluid from the control fluid supply through the outlet passage upon either a predetermined low pressure being reached or a predetermined high pressure being reached. When the valve element is seated on the other opposite valve seat, the control fluid from the valve actuator or the like is permitted to bleed to atmosphere.
    • 一种高低压响应先导阀结构,包括具有阀室的阀体,阀体具有相对的阀座。 其中一个阀座上的阀元件通过与阀元件接触的加压控制流体在工作压力范围内被偏置到其中的就位位置,从而允许控制流体通过出口通道流到阀致动器等。 流体响应装置接合阀元件,以在到达预定低压或预定高度时相对于来自控制流体供应通过出口通道的控制流体流动而将阀元件移动到另一相对阀座的阻挡位置 达到压力 当阀元件位于另一个相对的阀座上时,允许来自阀致动器等的控制流体泄漏到大气中。