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331 records (took 0.022 seconds)

    Precooled cryogenic ablation system
    251.
    发明授权
    Precooled cryogenic ablation system 有权
    预冷低温消融系统

    公开(公告)号：US06237355B1

    公开(公告)日：2001-05-29

    申请号：US09344423

    申请日：1999-06-25

    Applicant: Hong Li

    Inventor： Hong Li

    IPC: F25D300

    CPC classification number: F25D3/10 ,  A61B18/02 ,  A61B2018/0212 ,  A61B2018/0262

    Abstract: A method and apparatus for using a secondary refrigerant to precool and liquefy a primary refrigerant, then vaporizing and expanding the primary refrigerant to cool a cold tip of a cryosurgical instrument for ablation of biological tissue, such as cardiovascular tissue, in particular endocardiac tissue and tissue inside a cardiac blood vessel. The secondary refrigerant has a critical temperature above the critical temperature of the primary refrigerant, and a cooling temperature below the critical temperature of the primary refrigerant, thereby facilitating the use of the precooling step to provide liquid primary refrigerant in an operating room environment in which the primary refrigerant could not otherwise be provided in the liquid phase.

    Abstract translation: 一种用于使用二次制冷剂来预冷和液化一级制冷剂的方法和装置，然后蒸发和膨胀一级制冷剂以冷却冷冻手术器械的冷端以消除生物组织，例如心血管组织，特别是心内膜组织和组织 在心脏血管内。 次级制冷剂具有高于初级制冷剂的临界温度的临界温度，以及低于初级制冷剂的临界温度的冷却温度，从而有助于使用预冷却步骤在操作室环境中提供液体一级制冷剂，其中 初级制冷剂不能在液相中提供。

    Electromagnetic interference (EMI) shield apparatus and method
    253.
    发明授权
    Electromagnetic interference (EMI) shield apparatus and method 失效
    电磁干扰（EMI）屏蔽装置及方法

    公开(公告)号：US6147300A

    公开(公告)日：2000-11-14

    申请号：US12943

    申请日：1998-01-26

    Applicant: Hong Li ,  Kenneth S. Laughlin ,  Amir Koradia ,  Sajid Patel

    Inventor： Hong Li ,  Kenneth S. Laughlin ,  Amir Koradia ,  Sajid Patel

    IPC: G06F1/16 ,  H05K9/00

    CPC classification number: H05K9/0054 ,  G06F1/1601 ,  G06F2200/1611 ,  Y10S345/905

    Abstract: An apparatus and method for shielding electromagnetic interference (EMI) includes a cover having a body portion and an angled flange portion, the angled flange portion substantially surrounding a perimeter portion of the body portion to allow a force applied in a direction substantially perpendicular to the body portion to deflect the angled flange portion and bias the angled flange portion against a contact surface to form a positive contact between the angled flange portion and the contact surface thereby shielding EMI.

    Abstract translation: 用于屏蔽电磁干扰（EMI）的装置和方法包括具有主体部分和成角度的凸缘部分的盖，所述成角度的凸缘部分基本上围绕主体部分的周边部分，以允许沿基本垂直于主体的方向施加的力 部分以偏转成角度的凸缘部分并且将成角度的凸缘部分抵靠接触表面偏置以在倾斜的凸缘部分和接触表面之间形成正接触，从而屏蔽EMI。

    Gas mixture for cryogenic applications
    254.
    发明授权
    Gas mixture for cryogenic applications 失效
    用于低温应用的气体混合物

    公开(公告)号：US06074572A

    公开(公告)日：2000-06-13

    申请号：US286826

    申请日：1999-04-06

    Applicant: Hong Li ,  Daniel Taut ,  Eugene Reu ,  Eric Ryba

    Inventor： Hong Li ,  Daniel Taut ,  Eugene Reu ,  Eric Ryba

    IPC: F25B9/00 ,  C09K5/04

    CPC classification number: C09K5/044 ,  C09K2205/13

    Abstract: An optimum gas mixture formulated from a group of component fluids, for use in a miniature mixed gas refrigeration system. The gas mixture has appropriate components, in appropriate concentrations, to optimize refrigeration power and heat transfer capacity, and to minimize plugging of the Joule-Thomson expansion element. The gas mixture is pressurized by a compressor to a pressure less than 750 psia, and preferably less than 420 psia, for safety reasons, and supplied to a heat exchanger. The high pressure outlet of the heat exchanger is connected to a Joule-Thomson expansion element where the high pressure gas is expanded isenthalpically to a lower temperature at least as low as 183K. This low temperature gas cools a heat transfer element mounted in the distal end of the probe, to cool an external object. Return gas flows back through the heat exchanger to pre-cool the incoming high pressure gas mixture.

    Abstract translation: 由一组成分流体配制的最佳气体混合物，用于微型混合气体制冷系统。 气体混合物具有适当浓度的适当组分，以优化制冷功率和传热能力，并最大限度地减少焦耳 - 汤姆逊膨胀元件的堵塞。 出于安全原因，气体混合物被压缩机加压至小于750psia，优选小于420psia，并且供应到热交换器。 热交换器的高压出口连接到焦耳汤姆逊膨胀元件，其中高压气体以等离子体焓扩散至至少低至183K的较低温度。 该低温气体冷却安装在探针的远端的传热元件，以冷却外部物体。 回流气体通过热交换器流回，以对进入的高压气体混合物进行预冷却。

    Downhole cut-off valve used for cementing
    255.
    发明授权
    Downhole cut-off valve used for cementing 失效
    用于固井的井下截止阀

    公开(公告)号：US5957197A

    公开(公告)日：1999-09-28

    申请号：US850677

    申请日：1997-05-02

    Applicant: Xianchang Xia ,  Fuyan Zhang ,  Shaoxia Han ,  Xijun Tian ,  Hong Li

    Inventor： Xianchang Xia ,  Fuyan Zhang ,  Shaoxia Han ,  Xijun Tian ,  Hong Li

    IPC: E21B21/10 ,  E21B33/13

    CPC classification number: E21B21/10 ,  Y10T137/1677 ,  Y10T137/1789 ,  Y10T137/7869

    Abstract: A downhole cut-off valve used for cementing a casing string, comprising: an outer hollow body, having a top end connected at the lower end of the casing string, an inner hole, an inner surface and a projecting shoulder forming on the inner surface and extending inwardly; an inner hollow body, arranged slidably in said outer hollow body and having an inner hole, a wall with a plurality of through holes and a projection forming on the wall and below the through holes and extending outwardly, the projection being adapted to fit with the projecting shoulder of said outer body to define a preliminary position of said inner body with respect to said outer body; the longitudinal positions of the through holes and the projection being arranged in such a manner that the projecting shoulder of said outer body is located therebetween when said inner body is placed in said outer body and will at least partially cover the through holes in response to the movement of said inner body; a relief member, blocking the upper end of the inner hole of said inner hollow body and releasing automatically to expose the upper end of the inner hollow body when necessary; an adjusting member, arranged in the lower portion of said outer hollow body and being able to move longitudinally, and; a resilient member, arranged between said outer hollow body and said inner hollow body and having one end against the projection of said inner body and another end against said adjusting member.

    Abstract translation: 一种用于固定套管柱的井下截止阀，包括：外空心体，其具有连接在套管柱下端的顶端，内孔，内表面和形成在内表面上的凸肩 并向内延伸 内部空心体，其可滑动地布置在所述外部空心体中并具有内部孔，具有多个通孔的壁和形成在所述壁上并在所述通孔下方延伸并且向外延伸的突起，所述突起适于与 所述外体的突出肩部限定所述内体相对于所述外体的初步位置; 所述通孔和所述突起的纵向位置被设置成使得当所述内部主体被放置在所述外部主体中时所述外部主体的突出的肩部位于其间，并且响应于所述外部主体至少部分地覆盖通孔 所述内体的运动; 释放构件，阻挡所述内部空心体的内孔的上端，并且在需要时自动释放以暴露所述内部中空体的上端; 调节构件，布置在所述外部空心体的下部并能够纵向移动; 弹性构件，布置在所述外部空心体和所述内部空心体之间，并且一端抵靠所述内部本体的突出部，另一端抵靠所述调节构件。

    Pacemaker lead with extendable retractable lockable fixing helix
    256.
    发明授权
    Pacemaker lead with extendable retractable lockable fixing helix 失效
    起搏器引线带可伸缩锁定固定螺旋

    公开(公告)号：US5259395A

    公开(公告)日：1993-11-09

    申请号：US821107

    申请日：1992-01-15

    Applicant: Hong Li

    Inventor： Hong Li

    IPC: A61N1/05

    CPC classification number: A61N1/0573

    Abstract: A body implantable lead including a sheath, an electrode sleeve secured at a distal end of the sheath, a rotor body positioned within the sleeve, a fixing helix secured to a distal end of the rotor body, a torsion spring secured to a proximal end of the rotor body, and a rotation guide formed between the electrode sleeve and the rotor body which includes a helical groove formed on either the rotor body or the electrode sleeve and at least one guide pin formed on the electrode sleeve or the rotor body, respectively.

    Abstract translation: 包括护套的身体可植入引线，固定在鞘的远端的电极套管，位于套筒内的转子体，固定到转子体的远端的固定螺旋体，固定在转子主体的近端的扭簧 转子体和形成在电极套筒和转子体之间的旋转引导件，其包括形成在转子体或电极套筒上的螺旋槽和分别形成在电极套筒或转子体上的至少一个引导销。

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