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    • 4. 发明授权
    • Liquid sensing
    • 液体传感
    • US06813946B1
    • 2004-11-09
    • US10457216
    • 2003-06-09
    • Frances H. Benton
    • Frances H. Benton
    • G01F2330
    • G01F23/72G01F23/0038G01F23/68G01F23/74
    • Liquid sensing apparatuses and liquid sensing methods are described. In some embodiments, a liquid sensing apparatus includes a magnetic element; a source magnetic field, which produces on the magnetic element a magnetic force with a component that opposes a gravitational force on the magnetic element; and a structure configured to prevent rotation of the magnetic moment of the magnetic element relative to the magnetic field, e.g., so that the magnetic force remains greater than the gravitational force. The apparatus is capable of sensing the level of a liquid using a combination of magnetic force and buoyancy force.
    • 液体检测装置和液体检测方法被描述。 在一些实施例中,液体感测装置包括磁性元件; 源极磁场,其在磁性元件上产生具有与重力对应于磁性元件的分量的磁力; 以及被配置为防止磁性元件相对于磁场的磁矩的旋转的结构,例如使得磁力保持大于重力。 该装置能够使用磁力和浮力的组合来感测液体的液位。
    • 5. 发明授权
    • Locking ball valve for a fluid conduit
    • 用于流体导管的锁定球阀
    • US5632294A
    • 1997-05-27
    • US669639
    • 1996-06-24
    • Frances H. Benton
    • Frances H. Benton
    • F16K5/06F16K35/00
    • F16K35/00F16K5/0605Y10T137/0318
    • A locking valve for controlling fluid flow within a conduit has a spring-biased detent in fluid communication with a fluid source. A movable valve structure prevents fluid flow through the conduit in a closed position and enables fluid flow through the conduit in an open position. Movement of the valve structure from the closed position to the open position is obstructed by the detent when fluid pressure in the conduit is below a predetermined pressure. An increase in fluid pressure, however, moves the detent against the spring bias, removing the obstruction to movement of the valve structure, and allowing the valve structure to be moved to the open position. Thus, accidental or intentional drainage of the conduit when the fluid pressure source is inactive is avoided.
    • 用于控制管道内的流体流动的锁定阀具有与流体源流体连通的弹簧偏置的止动件。 可移动阀结构防止流体在封闭位置流过管道,并使流体能够在打开位置流过管道。 当管道中的流体压力低于预定压力时,阀门结构从关闭位置向打开位置的移动被制动器阻挡。 然而,流体压力的增加使得止动件抵抗弹簧偏压移动,消除阻塞阀结构的移动,并允许阀结构移动到打开位置。 因此,避免了当流体压力源不活动时导管的意外或有意的排水。