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    SOLVENT DELIVERY SYSTEM FOR LIQUID CHROMATOGRAPHY THAT MAINTAINS FLUID INTEGRITY AND PRE-FORMS GRADIENTS
    21.
    发明授权
    SOLVENT DELIVERY SYSTEM FOR LIQUID CHROMATOGRAPHY THAT MAINTAINS FLUID INTEGRITY AND PRE-FORMS GRADIENTS 有权
    用于液相色谱的溶剂输送系统，保持流体完整性和预分级梯度

    公开(公告)号：EP1996303B1

    公开(公告)日：2018-05-02

    申请号：EP07753315.6

    申请日：2007-03-16

    Applicant: Waters Technologies Corporation

    Inventor： CIAVARINI, Steven, J. ,  PENSAK, Stanley, P. ,  FINCH, Jeffrey, W. ,  FADGEN, Keith ,  LIU, Hongji

    IPC: G01N30/34

    CPC classification number: G01N30/34 ,  G01N30/32 ,  G01N2030/326 ,  G05D11/132

    Abstract: A solvent delivery subsystem for a chromatography device performs relatively low pressure, high flow mixing of solvents to form a gradient and subsequent high pressure, low flow delivery of the gradient to the separation column. The mixing of the gradient is independent and does not interfere with the gradient delivery. To form the gradient, the outputs of an aqueous pump and an organic pump are mixed to fill a storage capillary while a downstream point from the storage capillary is vented to atmosphere. After gradient formation, the vent to atmosphere is closed, the solvent delivery system rises to high pressure, and only the aqueous pump runs for gradient delivery. To maintain integrity of the fluid stream, the solvent delivery system uses feed forward compensation and controls at least one parameter selected from the group consisting of pressure and flow in the conduit means to follow a gradual ramp.

    HIGH PRESSURE FLUIDIC SWITCHING VALVE HAVING VARIABLE PRESSURE LOADING
    25.
    发明公开
    HIGH PRESSURE FLUIDIC SWITCHING VALVE HAVING VARIABLE PRESSURE LOADING 审中-公开
    具有可变压缩负荷流体高压调节阀

    公开(公告)号：EP2705286A1

    公开(公告)日：2014-03-12

    申请号：EP12779916.1

    申请日：2012-04-24

    Applicant: Waters Technologies Corporation

    Inventor： BUNNER, Bernard ,  MICHIENZI, Joseph ,  FADGEN, Keith

    IPC: F16K31/12

    CPC classification number: F16K3/10 ,  F16K3/18 ,  F16K31/041 ,  G01N35/1097 ,  G01N2030/202 ,  Y10T137/0318

    Abstract: Described are a rotary shear seal valve and a method for switching a high pressure fluid. The method includes applying a fixed force between a planar surface of a rotor and a planar surface of a stator. The planar surface of the rotor includes a fluidic channel and the planar surface of the stator has a pair of ports to receive and provide the fluid. A control signal is applied to a linear actuator coupled to the rotor to generate a controllable force between the planar surfaces of the rotor and stator. The control signal is responsive to a rotational state of the rotor. The total force between the planar surfaces of the rotor and the stator is substantially equal to a sum of the fixed force and the controllable force. The method reduces the wear and extends the lifetime of components in a rotary shear seal valve.

    VARIABLE-VOLUME INJECTION VALVE
    27.
    发明公开
    VARIABLE-VOLUME INJECTION VALVE 审中-公开
    体积可变喷油器

    公开(公告)号：EP2609351A1

    公开(公告)日：2013-07-03

    申请号：EP11820698.6

    申请日：2011-08-26

    Applicant: Waters Technologies Corporation

    Inventor： GERHARDT, Geoff, C. ,  FADGEN, Keith

    IPC: F16K11/074

    CPC classification number: F16K11/00 ,  F16K11/0743 ,  Y10T137/0318 ,  Y10T137/86863

    Abstract: Variable- volume injection valves include a stator and a rotor. The stator has a first port, a second port, and a contact surface with a groove therein. The first port opens into the stator groove. The rotor has a contact surface with a groove therein. The contact surface of the rotor is urged against the contact surface of the stator such that the rotor groove opposes the stator groove with one end of the rotor groove overlapping the stator groove and the opposite end of the rotor groove overlapping the second port of the stator. The overlapping grooves of the rotor and stator provide a fluidic channel between the first and second ports of the stator. The rotor is movable with respect to the stator in order to vary a length of overlap between their overlapping grooves.

    METHOD AND APPARATUS FOR PERFORMING MASS SPECTROMETRY
    28.
    发明公开
    METHOD AND APPARATUS FOR PERFORMING MASS SPECTROMETRY 审中-公开
    方法和设备进行质谱光谱

    公开(公告)号：EP2460002A1

    公开(公告)日：2012-06-06

    申请号：EP10804886.9

    申请日：2010-07-16

    Applicant: Waters Technologies Corporation

    Inventor： FADGEN, Keith

    IPC: G01N30/72

    CPC classification number: C12M45/09 ,  G01N30/06 ,  G01N30/7233 ,  G01N30/88 ,  G01N2030/067 ,  G01N2030/8831 ,  G01N2030/8881

    Abstract: The invention feature devices and methods for preserving and processing samples comprising a fluid having deuterated compounds. The device of the present invention comprises a housing defining a first chamber and a second chamber. The first chamber is heated to an elevated temperature and receives the sample and performs a digestion process on the sample at the elevated temperature. The second chamber is cooled to a low temperature and receives the deuterated digested sample from the first chamber and performs one or more separation steps to isolate an analyte. The device of further comprises conduit means for containing and moving the sample into the first chamber to form a digested sample. The conduit means moves the digested sample from the first chamber to the second chamber to separate the sample to form at least one analyte. The analyte is maintained at the low temperature to preserve its deuterated form.

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