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    • 9. 发明授权
    • Combination broacher-reamer for use in orthopaedic surgery
    • 用于整形外科手术的组合绞肉机 - 铰刀
    • US5931841A
    • 1999-08-03
    • US66243
    • 1998-04-24
    • Christopher R. Ralph
    • Christopher R. Ralph
    • A61B17/16A61B19/00
    • A61B17/1659A61B2090/062Y10T407/1671Y10T408/9065
    • A combination broacher-reamer includes a generally longitudinally symmetrical cutting tool which is provided with a plurality of longitudinal broaching cutting teeth as well as a plurality of axial reaming cutting teeth. According to a presently preferred embodiment, the broacher-reamer is generally cylindrical with a smooth blunt distal tip and a tapered distal cutting portion. The proximal end of the tool is provided with a handle and one or more witness marks are provided on the shank of the tool. If the handle is removable the shank may be coupled to a motor or impacting tool. An exemplary broacher-reamer according to the invention is approximately 6.78 inches long with an overall maximum diameter of approximately 0.843 inches. The proximal end of the tool has a diametrical throughbore which is dimensioned to receive the handle which is approximately 3.94 inches long. The cutting portion of the tool begins approximately 3.0 inches distal of the proximal end and terminates approximately 1.25 inches short of the blunt smooth distal end of the tool. The reaming cutting teeth are arranged in a plurality of helical paths which transect the broaching teeth, each helical path being offset from an adjacent path by approximately 36 degrees and having a right hand helix angle of approximately 28 degrees. The flutes of the reaming teeth are the same depth as and are interrupted by the spaces (fillets) between the broaching teeth.
    • 组合式拉刀铰刀包括大致纵向对称的切削工具,其具有多个纵向拉削切削齿以及多个轴向扩孔切割齿。 根据目前优选的实施例,布拉叉铰刀通常是圆柱形的,具有平滑钝的远端尖端和锥形的远端切割部分。 工具的近端设置有把手,并且在工具的柄上提供一个或多个见证标记。 如果手柄是可移动的,则柄可以联接到马达或冲击工具。 根据本发明的示例性拉布拉伐机大约为6.78英寸长,总最大直径约为0.843英寸。 工具的近端具有直径通孔,其尺寸适于接收约3.94英寸长的手柄。 刀具的切割部分从近端的近端开始大约3.0英寸,并且在工具的钝的平滑远端终止大约1.25英寸。 扩孔切割齿布置成多个螺旋路径,其横切拉刀齿,每个螺旋路径从相邻路径偏移大约36度,并且具有大约28度的右手螺旋角。 铰孔齿的凹槽与拉刀齿之间的空隙(圆角)相同并且被中断。