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    System for cardiac procedures
    32.
    发明授权
    System for cardiac procedures 失效
    心脏手术系统

    公开(公告)号：US5885238A

    公开(公告)日：1999-03-23

    申请号：US453426

    申请日：1995-05-30

    申请人： John H. Stevens ,  Philip C. Evard ,  Timothy R. Machold

    发明人： John H. Stevens ,  Philip C. Evard ,  Timothy R. Machold

    IPC分类号： A61B17/00 ,  A61B17/28 ,  A61B17/32 ,  A61F2/24 ,  A61F2/958 ,  A61M1/36 ,  A61M25/00 ,  A61M25/01 ,  A61M25/06 ,  A61M29/02 ,  A61M37/00 ,  A61M29/00

    CPC分类号： A61F2/2427 ,  A61B17/29 ,  A61F2/2433 ,  A61M1/3653 ,  A61M1/3659 ,  A61M25/0041 ,  A61M25/0147 ,  A61M25/0152 ,  A61M25/0662 ,  A61M25/10 ,  A61B17/320016 ,  A61B2017/00243 ,  A61B2018/00232 ,  A61B2018/00261 ,  A61F2/2436 ,  A61M2025/0031 ,  A61M2025/0078 ,  A61M2025/015 ,  A61M2025/0161 ,  A61M2025/028 ,  A61M2025/1047 ,  A61M2025/1052 ,  A61M2025/1077 ,  A61M2025/1095 ,  A61M2205/11 ,  A61M2205/366 ,  A61M2210/125 ,  A61M2210/127 ,  A61M25/0032 ,  A61M25/0125 ,  A61M25/1002

    摘要： A system for accessing a patient's cardiac anatomy which includes an endovascular aortic partitioning device that separates the coronary arteries and the heart from the rest of the patient's arterial system. The endovascular device for partitioning a patient's ascending aorta comprises a flexible shaft having a distal end, a proximal end, and a first inner lumen therebetween with an opening at the distal end. The shaft may have a preshaped distal portion with a curvature generally corresponding to the curvature of the patient's aortic arch. An expandable means, e.g. a balloon, is disposed near the distal end of the shaft proximal to the opening in the first inner lumen for occluding the ascending aorta so as to block substantially all blood flow therethrough for a plurality of cardiac cycles, while the patient is supported by cardiopulmonary bypass. The endovascular aortic partitioning device may be coupled to an arterial bypass cannula for delivering oxygenated blood to the patient's arterial system. The heart muscle or myocardium is paralyzed by the retrograde delivery of a cardioplegic fluid to the myocardium through patient's coronary sinus and coronary veins, or by antegrade delivery of cardioplegic fluid through a lumen in the endovascular aortic partitioning device to infuse cardioplegic fluid into the coronary arteries. The pulmonary trunk may be vented by withdrawing liquid from the trunk through an inner lumen of an elongated catheter. The cardiac accessing system is particularly suitable for removing the aortic valve and replacing the removed valve with a prosthetic valve.

    摘要翻译： 一种用于访问患者心脏解剖结构的系统，其包括将冠状动脉和心脏与患者动脉系统的其余部分分离的血管内主动脉分配装置。 用于分隔患者升主动脉的血管内装置包括具有远端，近端和其间的第一内腔的柔性轴，在远端具有开口。 轴可以具有预先形成的远端部分，其曲率通常对应于患者主动脉弓的曲率。 可膨胀装置，例如 靠近靠近第一内腔中的开口的轴的远端附近的气囊，用于闭塞升主动脉，以便阻止基本上所有的血液通过其进行多个心动周期，同时患者由体外循环 。 血管内主动脉分配装置可以联接到动脉旁路套管，用于将氧合血液输送到患者的动脉系统。 通过患者的冠状窦和冠状静脉逆行递送心脏停搏液到心肌，或者通过血管内主动脉分配装置的内腔顺序递送心脏停跳液，将心肌或心肌瘫痪，将心脏停搏液注入冠状动脉 。 可以通过从细长的导管的内腔中抽出液体来排出肺动脉干。 心脏存取系统特别适用于去除主动脉瓣并用假体瓣替换去除的瓣膜。

    Passive and active up-drill features on fixed cutter earth-boring tools and related systems and methods
    36.
    发明授权
    Passive and active up-drill features on fixed cutter earth-boring tools and related systems and methods 有权
    固定刀具钻孔工具的被动和主动上钻特点及相关系统和方法

    公开(公告)号：US08047309B2

    公开(公告)日：2011-11-01

    申请号：US12133988

    申请日：2008-06-05

    申请人： James L. Overstreet ,  Robert J. Buske ,  Kenneth E. Gilmore ,  John H. Stevens

    发明人： James L. Overstreet ,  Robert J. Buske ,  Kenneth E. Gilmore ,  John H. Stevens

    IPC分类号： E21B10/43

    CPC分类号： E21B7/28 ,  E21B10/003 ,  E21B10/43 ,  E21B17/1092

    摘要： Earth-boring tools include at least one up-drill feature disposed on a transition surface so as to be passive during down drilling and active during up drilling and/or back reaming operations. Systems for down drilling and up drilling with drill bits comprising one or more up-drill features are also disclosed. Furthermore, methods for forming a borehole with an earth-boring tool including such up-drill features and for forming an earth-boring tool comprising such up-drill features are also disclosed.

    摘要翻译： 钻孔工具包括设置在过渡表面上的至少一个上钻特征，以便在下钻期间是被动的，并且在上钻和/或后扩孔操作期间是活动的。 还公开了用于具有包括一个或多个向上钻孔特征的钻头的下钻和上钻的系统。 此外，还公开了一种用包括这种上钻特征的钻孔工具形成钻孔的方法，并且还公开了用于形成包括这种上钻特征的钻孔工具的方法。

    Earth-boring bits
    37.
    发明授权
    Earth-boring bits 有权
    无聊的钻头

    公开(公告)号：US08007714B2

    公开(公告)日：2011-08-30

    申请号：US12033960

    申请日：2008-02-20

    申请人： Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins ,  John H. Stevens ,  Steven G. Caldwell ,  Alfred J. Mosco

    发明人： Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins ,  John H. Stevens ,  Steven G. Caldwell ,  Alfred J. Mosco

    IPC分类号： B22F3/10

    CPC分类号： E21B10/46 ,  B22F2005/001 ,  B22F2998/00 ,  C22C1/1068 ,  C22C29/00 ,  C22C29/005 ,  C22C29/067 ,  B22F7/06

    摘要： The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles, wherein the hard particles comprise at least one of carbide, nitride, boride, oxide, and solid solutions thereof, and a binder binding together the hard particles. The binder may comprise at least one metal selected from cobalt, nickel, and iron and, optionally, at least one melting point reducing constituent selected from a transition metal carbide in the range of 30 to 60 weight percent, boron up to 10 weight percent, silicon up to 20 weight percent, chromium up to 20 weight percent, and manganese up to 25 weight percent, wherein the weight percentages are based on the total weight of the binder. In addition, the hard particles may comprise at least one of (i) cast carbide (WC+W2C) particles, (ii) transition metal carbide particles selected from the carbides of titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and (iii) sintered cemented carbide particles.

    摘要翻译： 本发明涉及用于形成钻头的钻头体的组合物和方法。 钻头体可以包括硬颗粒，其中硬颗粒包括碳化物，氮化物，硼化物，氧化物和固溶体中的至少一种，以及将硬颗粒结合在一起的粘合剂。 粘合剂可以包含选自钴，镍和铁中的至少一种金属和任选的至少一种选自30-60重量％范围的过渡金属碳化物，至多10重量％的熔点降低成分， 最高达20重量％的硅，至多20重量％的铬，至多25重量％的锰，其中重量百分比是基于粘合剂的总重量。 此外，硬颗粒可以包括（i）碳化钨（WC + W2C）颗粒，（ii）过渡金属碳化物颗粒中的至少一种，其选自钛，铬，钒，锆，铪，钽，钼， 铌和钨，和（iii）烧结的硬质合金颗粒。

    METHODS OF FORMING BODIES OF EARTH-BORING TOOLS
    38.
    发明申请
    METHODS OF FORMING BODIES OF EARTH-BORING TOOLS 有权
    形成地球工具的方法

    公开(公告)号：US20100319492A1

    公开(公告)日：2010-12-23

    申请号：US12870515

    申请日：2010-08-27

    申请人： Redd H. Smith ,  John H. Stevens

    发明人： Redd H. Smith ,  John H. Stevens

    IPC分类号： B21K5/04

    CPC分类号： B22F7/06 ,  C22C26/00 ,  C22C29/00 ,  E21B10/54

    摘要： Methods for forming bodies of earth-boring drill bits and other tools include milling a plurality of hard particles and a plurality of particles comprising a matrix material to form a mill product comprising powder particles, separating the particles into a plurality of particle size fractions. Some of the particles from the fractions may be combined to form a powder mixture, which may be pressed to form a green body. Additional methods include mixing a plurality of hard particles and a plurality of particles comprising a matrix material to form a powder mixture, and pressing the powder mixture with pressure having an oscillating magnitude to form a green body. In yet additional methods a powder mixture may be pressed within a deformable container to form a green body and drainage of liquid from the container is enabled as the powder mixture is pressed.

    摘要翻译： 用于形成钻孔钻头和其他工具的主体的方法包括铣削多个硬颗粒和多个包含基质材料的颗粒，以形成包含粉末颗粒的研磨产物，将颗粒分离成多个颗粒级分。 可以将来自级分的一些颗粒组合以形成粉末混合物，其可以被压制以形成生坯体。 附加方法包括混合多个硬颗粒和多个包含基质材料的颗粒以形成粉末混合物，并且以具有振荡大小的压力挤压粉末混合物以形成生坯体。 在另外的方法中，粉末混合物可以在可变形容器内压制以形成生坯，并且当粉末混合物被压制时，能够从容器排出液体。

    Method for forming earth-boring tools comprising silicon carbide composite materials
    40.
    发明授权
    Method for forming earth-boring tools comprising silicon carbide composite materials 有权
    用于形成包含碳化硅复合材料的钻孔工具的方法

    公开(公告)号：US07807099B2

    公开(公告)日：2010-10-05

    申请号：US11965018

    申请日：2007-12-27

    申请人： Heeman Choe ,  John H. Stevens ,  James C. Westhoff ,  Jimmy W. Eason ,  James L. Overstreet

    发明人： Heeman Choe ,  John H. Stevens ,  James C. Westhoff ,  Jimmy W. Eason ,  James L. Overstreet

    IPC分类号： B22F3/12

    CPC分类号： E21B10/46 ,  B22D23/00 ,  B22F3/162 ,  B22F2005/001 ,  B22F2999/00 ,  C22C1/1036 ,  C22C29/065 ,  C22C32/0063 ,  C22C2001/1047 ,  B22F3/1021 ,  C22C1/1094

    摘要： Earth-boring tools for drilling subterranean formations include a particle-matrix composite material comprising a plurality of silicon carbide particles dispersed throughout a matrix material, such as, for example, an aluminum or aluminum-based alloy. In some embodiments, the silicon carbide particles comprise an ABC—SiC material. Methods of manufacturing such tools include providing a plurality of silicon carbide particles within a matrix material. Optionally, the silicon carbide particles may comprise ABC—SiC material, and the ABC—SiC material may be toughened to increase a fracture toughness exhibited by the ABC—SiC material. In some methods, at least one of an infiltration process and a powder compaction and consolidation process may be employed.

    摘要翻译： 用于钻探地下地层的钻孔工具包括颗粒 - 基质复合材料，其包含分散在整个基质材料（例如铝或铝基合金）中的多个碳化硅颗粒。 在一些实施例中，碳化硅颗粒包括ABC-SiC材料。 制造这种工具的方法包括在基质材料内提供多个碳化硅颗粒。 任选地，碳化硅颗粒可以包括ABC-SiC材料，并且可以增强ABC-SiC材料以增加由ABC-SiC材料显示的断裂韧性。 在一些方法中，可以采用渗透方法和粉末压实和固结方法中的至少一种。