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    • 6. 发明授权
    • Process of making a set of distinguishable robertson driver bits
    • 制作一组可区分的罗伯逊驱动程序位的过程
    • US06490950B2
    • 2002-12-10
    • US09783030
    • 2001-02-15
    • James C. RayTom Rankin
    • James C. RayTom Rankin
    • B21K500
    • G09F3/00B25B13/56
    • A set of driver bits for Robertson screw fasteners includes driver bits (10a-d) whose shaft bodies (12a-d) have distinctive markings thereon corresponding to respective sizes of working tips (14a-d) of the driver bits. These distinctive markings are consistent throughout a family of sets. In one embodiment the distinctive marking are different colors, with each different color corresponding to a working-tip size. The colors are applied only to shaft bodies (36a-d) of some of the driver bits by plating the shaft bodies with zinc layers (22) and then dying the outer surfaces of the zinc layers with color dye (24). This coloring is carried out before the shaft bodies are connected to their respective working tips. Once the outer surfaces (20) of the shaft bodies are thusly colored, the respective working tips are swaged to the shaft bodies to thereby form color-coded Robertson driver bits. In another embodiment, the distinctive markings are surface-irregularity rings (32) extending about the elongated shafts, with the least number of rings corresponding to the smallest size working tip and the most number rings corresponding to the largest working tip.
    • 用于罗伯逊螺丝紧固件的一组驱动钻头包括驱动钻头(10a-d),其轴体(12a-d)在其上具有与驱动钻头的工作尖端(14a-d)的相应尺寸对应的不同标记。 这些独特的标记在整套系列中是一致的。 在一个实施例中,特征标记是不同的颜色,每个不同的颜色对应于工作尖端尺寸。 通过用锌层(22)对轴体进行电镀,然后用彩色染料(24)将锌层的外表面染色,颜色仅施加于一些驱动钻头的轴体(36a-d)。 这种着色在轴体连接到它们各自的工作尖端之前进行。 一旦轴体的外表面(20)因此被着色,各个工作尖端被模锻到轴体,从而形成颜色编码的罗伯逊驱动头。 在另一个实施例中,不同的标记是围绕细长轴延伸的表面不规则环(32),其中最少数量的环对应于最小尺寸的工作尖端和对应于最大工作尖端的最多数量的环。