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    • 19. 发明授权
    • Head for blind rivet installation tools
    • 头铆钉安装工具
    • US4691552A
    • 1987-09-08
    • US818475
    • 1986-01-13
    • Richard B. Peterson
    • Richard B. Peterson
    • B21J15/04B21J15/06B21J15/32
    • B21J15/043B21J15/105Y10T29/5373Y10T29/5377
    • The improvement of the head of the blind rivet driving tool comprises (1) configuring and proportioning the head so that insertion of the shank of a blind rivet assembly into the tip of the head for installation causes the expendable portion of the rivet assembly previously installed to partially exit from the exit end of the head and (2) apparatus at the exit end which retains the expendable portion in the head until it is caused to partially exit and then holds the expendable portion unit it is extracted by the operator. The longitudinal axes of the head, its tip, casing and retention apparatus are essentially coincident. A preferred embodiment of the retention apparatus comprises a resilient wafer having a plurality of wedge shaped leaf spring segments extending from the rim of the wafer toward its center, the ends of the segments forming a segmented periphery of a hole having a diameter somewhat smaller than that of the rivet shank. As a shank portion is expelled the segments deflect to form a segmented periphery with a diameter large enough to allow the exit of the shank portion.
    • 盲铆钉驱动工具的头部的改进包括(1)构造和配合头部,使得盲铆钉组件的柄部插入到头部的尖端中用于安装,使铆钉组件的消耗部分预先安装到 部分地从头部的出口端部退出,(2)在出口端的装置,其将消耗部分保持在头部中,直到其被部分地退出,然后保持消耗部分单元被操作者抽出。 头部,其尖端,套管和保持装置的纵向轴线基本上是重合的。 保持装置的优选实施例包括具有从晶片边缘向其中心延伸的多个楔形板簧片的弹性晶片,所述片段的端部形成具有稍小于直径略小于直径的直径的孔的分段周边 的铆钉柄。 当柄部分被排出时,片段偏转以形成直径足够大以允许柄部分的出口的分段周边。