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    • 8. 发明授权
    • Electrosurgical instrument with conductive ceramic or cermet and method
of making same
    • 导电陶瓷或金属陶瓷的电外科仪器及其制造方法
    • US5925039A
    • 1999-07-20
    • US661980
    • 1996-06-12
    • Richard L. Landingham
    • Richard L. Landingham
    • A61B18/00A61B18/04A61B18/12A61B18/14A61B17/36
    • A61B18/14A61B2018/00119
    • An electrosurgical instrument including an active electrode surface made of a conducting ceramic or cermet. The conducting ceramic may be a carbide, boride, or nitride ceramic or a mixture of these ceramics. The cermet may include a ceramic and a metal selected from the group consisting of Cobalt, Nickel, Iron, Tungsten, Molybdenum, Titanium, Zirconium, and Aluminum. The conducting ceramic or cermet active electrode surface may be supported on a core. In some embodiments, the core is a metal core with the active electrode surface formed as a coating on a surface of the metal core. In other embodiments, the core is made of electrically insulating material. Some embodiments of the invention are Bovie blades, bipolar forceps, cauterizing end effectors for endoscopic surgery, bipolar biopsy devices, and spatula blades having the inventive active electrode surface.
    • 一种电外科器械,包括由导电陶瓷或金属陶瓷制成的活性电极表面。 导电陶瓷可以是碳化物,硼化物或氮化物陶瓷或这些陶瓷的混合物。 金属陶瓷可以包括陶瓷和选自钴,镍,铁,钨,钼,钛,锆和铝的金属。 导电陶瓷或金属陶瓷有源电极表面可以被支撑在芯上。 在一些实施例中,芯是金属芯,其中有源电极表面形成为在金属芯的表面上的涂层。 在其它实施例中,芯由电绝缘材料制成。 本发明的一些实施例是Bovie刀片,双极镊子,用于内窥镜手术的烧灼末端执行器,双极活检装置和具有本发明的有效电极表面的刮刀刀片。
    • 9. 发明授权
    • Porous metallic bodies
    • 多孔金属体
    • US4560621A
    • 1985-12-24
    • US589255
    • 1984-03-13
    • Richard L. Landingham
    • Richard L. Landingham
    • B22F3/00B22F3/11B22F3/10B22F3/16
    • B22F3/1143B22F3/001B22F3/1125B22F2003/1128B22F2998/00B22F2999/00Y10T428/12153
    • Porous metallic bodies having a substantially uniform pore size of less than about 200 microns and a density of less than about 25 percent theoretical, as well as the method for making them, are disclosed. Group IIA, IIIB, IVB, VB, and rare earth metal hydrides are heated in a confining container at a controlled rate to a temperature of about greater than the temperature at which the hydride decomposes. Hydrogen is removed from the container and the remaining metal is heated during a second stage to a temperature greater than the temperature at which it was previously heated but not greater than the temperature of 1/2 to 2/3 the temperature at which the metal melts at a controlled rate. The resulting porous metallic body produced has a density less than about 25 percent theoretical and a pore size of less than about 200 microns. The metallic particles of the present invention have high inner surface area and possess minimum resistance to gas flow.
    • 公开了具有小于约200微米的基本均匀的孔径和理论上小于约25%的密度的多孔金属体,以及制造它们的方法。 IIA族,IIIB族,IVB族,VB族和稀土金属氢化物在受限制的容器中以约大于氢化物分解温度的温度加热。 从容器中除去氢气,剩余的金属在第二阶段被加热到大于其预先加热的温度的温度,但不高于金属熔化温度的1/2至2/3的温度 以受控的速度。 产生的所得多孔金属体的理论密度小于约25%,孔径小于约200微米。 本发明的金属颗粒具有高的内表面积并具有最小的气流阻力。