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    Liquid column pressure and vacuum vent
    8.
    发明授权
    Liquid column pressure and vacuum vent 有权
    液柱压力和真空排气口

    公开(公告)号：US06973938B2

    公开(公告)日：2005-12-13

    申请号：US10340900

    申请日：2003-01-14

    申请人： Thomas O. Mitchell

    发明人： Thomas O. Mitchell

    IPC分类号： F16K17/192 ,  F16K13/10

    CPC分类号： F16K17/192 ,  F16K13/10 ,  Y10T137/4553 ,  Y10T137/4643 ,  Y10T137/778

    摘要： A pressure and vacuum vent utilizing a column of liquid to open and close the vent at predetermined pressure and vacuum levels. A column of liquid is constrained in connection with internal and external passages coupled between a pair of expansion chambers. The external passage is sized to hold a level of liquid corresponding to a predetermined positive pressure level at which the valve will open, while the internal passage is sized to hold a level of liquid corresponding to a predetermined negative pressure level at which the valve will open. At either the predetermined positive or negative pressure level, the valve opens when sufficient liquid has exited either the external or internal passage to permit the flow of a restrained gas past the liquid column.

    摘要翻译： 压力和真空排气口，利用一列液体在预定压力和真空水平下打开和关闭排气口。 一列液体与连接在一对膨胀室之间的内部和外部通道结合而受到约束。 外部通道的大小适于保持对应于阀将打开的预定正压力水平的液体水平，同时内部通道的尺寸设置成保持对应于阀将打开的预定负压水平的液位水平 。 在预定的正或负压力水平，当足够的液体已经排出外部或内部通道以允许限制气体流过液体柱时阀门打开。