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    Methods and apparatus for determining the presence or absence of a fluid leak
    7.
    发明授权
    Methods and apparatus for determining the presence or absence of a fluid leak 有权
    用于确定流体泄漏的存在或不存在的方法和装置

    公开(公告)号：US07241115B2

    公开(公告)日：2007-07-10

    申请号：US10645082

    申请日：2003-08-21

    申请人： Joseph A. Luongo ,  Steven J. Ciavarini ,  Robert Q. Tacconi ,  Frank A. Rubino ,  Robert J. Dumas

    发明人： Joseph A. Luongo ,  Steven J. Ciavarini ,  Robert Q. Tacconi ,  Frank A. Rubino ,  Robert J. Dumas

    IPC分类号： F04B49/00 ,  G01M3/04 ,  G08B21/00

    CPC分类号： F04B51/00 ,  F04B2205/04 ,  F04B2205/05

    摘要： Embodiments of the present invention feature a method and apparatus for detecting defects, such as, leaks, component failure and adverse performance. One embodiment of the present apparatus for pumping fluid comprises a pumping chamber having an inlet and an outlet powered by a motor. The motor operates in pumping mode upon receiving a pumping signal. The apparatus further comprises at least one inlet valve in fluid communication with the inlet of the pumping chamber. And, the apparatus comprises a switchable valve in fluid communication with the outlet of the pumping chamber. The switchable valve has a closed position and an open position, and assumes the closed position upon receiving a close signal. A pressure measuring device is in fluid communication with the pumping chamber, between said inlet valve and switchable valve. The pressure measuring device determines a minimal pressure and first threshold pressure at a first time and a second threshold pressure at a second time. The control means calculates the slope of a line representing the difference of said first threshold pressure signal and said second threshold pressure signal over time and comparing the slope with a threshold decay value. And, the control means compares the minimal pressure to a minimal acceptable value. Deviations from such values represent a defect in the pump.

    摘要翻译： 本发明的实施例的特征在于用于检测诸如泄漏，部件故障和不利性能之类的缺陷的方法和装置。 用于泵送流体的本装置的一个实施例包括具有由电动机供电的入口和出口的泵送室。 电机在接收到泵送信号时以泵送模式工作。 该装置还包括与泵送室的入口流体连通的至少一个入口阀。 并且，该装置包括与泵送室的出口流体连通的可切换阀。 可切换阀具有关闭位置和打开位置，并且在接收到闭合信号时处于关闭位置。 压力测量装置与所述抽吸室在所述入口阀和可切换阀之间流体连通。 压力测量装置在第一时间确定最小压力和第一阈值压力，并且在第二时间确定第二阈值压力。 控制装置计算表示所述第一阈值压力信号和所述第二阈值压力信号随时间的差的线的斜率，并将该斜率与阈值衰减值进行比较。 而且，控制装置将最小压力与最小可接受值进行比较。 与这些值的偏差代表了泵的缺陷。

    Device and Methods of Measuring Pressure
    9.
    发明申请
    Device and Methods of Measuring Pressure 有权
    测量压力的装置和方法

    公开(公告)号：US20080260558A1

    公开(公告)日：2008-10-23

    申请号：US10598310

    申请日：2005-03-04

    申请人： Joseph A. Luongo ,  John Angelosanto ,  Frank Rubino ,  Stanley P. Pensak Jr. ,  David J. First ,  Jean-Pierre Pugnaire ,  Richard R. Venable

    发明人： Joseph A. Luongo ,  John Angelosanto ,  Frank Rubino ,  Stanley P. Pensak Jr. ,  David J. First ,  Jean-Pierre Pugnaire ,  Richard R. Venable

    IPC分类号： F04B39/00 ,  G01L9/04

    CPC分类号： F04B53/162 ,  F04B53/16 ,  F04B2205/03 ,  G01N2030/326

    摘要： Embodiments of the present invention are directed to method and devices for measuring the pressure of a pump chamber in which no internal opening or connections are needed. One embodiment of the present invention is directed to an apparatus for pumping fluid. The apparatus comprises at least one housing having a transducer surface. The transducer surface has a thickness exhibiting measurable deformation upon the chamber holding a fluid under pressure such that the transducer surface has a first position at which the chamber is at one pressure and a second position at which the chamber is at a second pressure. A strain sensor is affixed to the transducer surface producing; at least one signal upon the transducer surface assuming the first position and at least one signal upon the transducer surface assuming the second position to function as an integrated pressure transducer.

    摘要翻译： 本发明的实施例涉及用于测量不需要内部开口或连接的泵室的压力的方法和装置。 本发明的一个实施例涉及一种用于泵送流体的装置。 该装置包括具有换能器表面的至少一个壳体。 换能器表面具有在腔室上保持流体的压力下呈现可测量变形的厚度，使得换能器表面具有腔室处于一个压力的第一位置和腔室处于第二压力的第二位置。 应变传感器固定在传感器表面上; 在换能器表面上的至少一个信号假设第一位置，并且在换能器表面上的至少一个信号假设第二位置用作集成的压力换能器。

    High pressure pump with reduced seal wear
    10.
    发明授权
    High pressure pump with reduced seal wear 有权
    高压泵，减少密封磨损

    公开(公告)号：US09377011B2

    公开(公告)日：2016-06-28

    申请号：US14007392

    申请日：2012-04-17

    申请人： Joshua A. Shreve ,  Neal B. Almeida ,  John Angelosanto ,  Joseph A. Luongo

    发明人： Joshua A. Shreve ,  Neal B. Almeida ,  John Angelosanto ,  Joseph A. Luongo

    IPC分类号： F04B7/00 ,  F04B15/00 ,  F04B53/00 ,  F04B53/02 ,  F04B53/16

    CPC分类号： F04B7/0088 ,  F04B15/00 ,  F04B53/007 ,  F04B53/02 ,  F04B53/164

    摘要： Described are embodiments of a pump that can be used, for example, in liquid chromatography applications. The pump includes a seal wash housing, pump head and seal assembly. A wear-resistant coating applied to a sealing surface or gland of the pump head or seal wash housing improves the hardness and chemical compatibility of the sealing surface. Oxidation of the sealing surface is reduced so that the sealing surface is less abrasive to the seal assembly and the lifetime of the seal assembly is increased.

    摘要翻译： 描述了可以用于例如液相色谱应用中的泵的实施方案。 该泵包括一个密封清洗外壳，泵头和密封组件。 施加到泵头或密封清洗壳体的密封表面或密封套上的耐磨涂层改善了密封表面的硬度和化学相容性。 减小密封表面的氧化，使得密封表面对密封组件的磨损较小，并且密封组件的寿命增加。