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    THREAD FORMING FASTENER
    3.
    发明申请
    THREAD FORMING FASTENER 审中-公开
    螺纹紧固件

    公开(公告)号：WO2009023168A2

    公开(公告)日：2009-02-19

    申请号：PCT/US2008/009588

    申请日：2008-08-11

    Applicant: RESEARCH ENGINEERING & MANUFACTURING, INC. ,  PRITCHARD, Alan

    Inventor： PRITCHARD, Alan

    IPC: F16B33/02

    CPC classification number: F16B25/00 ,  F16B25/0015 ,  F16B25/0047

    Abstract: A thread forming fastener for threading into a nut anchor of a pliable material wherein there is produced during the driving of the fastener a combination of forces that encourages the nut anchor material to flow smoothly and to develop a mating thread in the nut anchor that minimizes stress cracking and radial hoop stress as the mating thread is being formed. The fastener comprises a drive head and a shank extending from the head and having a longitudinal axis, the shank including a core and a thread having a selected axial pitch, a selected thread height and a profile which in axial cross-section includes a leading face, a trailing face and a tip. The leading face is composed of a radially inner concave portion having a first radius and which transitions smoothly to a radially outer convex portion having a second radius, the transition occurring at a point on the common tangent to those portions. The trailing face is composed of a radially inner linear portion which transitions at a selected transition location to a radially outer convex portion having a third radius. The profile also includes a convex blending portion having a fourth radius which blends together the radially outer leading and trailing face portions at the tip. The thread profile produces force vectors during assembly with the nut anchor that provide enhanced mating thread strength and improved resistance to nut anchor thread breakdown.

    Abstract translation: 用于穿入柔性材料的螺母锚固件的螺纹成形紧固件，其中在紧固件驱动期间产生的力的组合促使螺母锚固材料平稳地流动并且在螺母锚固件中形成最小化应力的配合螺纹 正在形成配合螺纹时的开裂和径向环向应力。 紧固件包括驱动头和从头部延伸并且具有纵向轴线的柄，柄包括芯部和具有选定的轴向间距的螺纹，所选择的螺纹高度和在轴向截面中包括引导面的轮廓 ，后面和尖端。 引导面由具有第一半径的径向内凹部构成，并且平滑地转变到具有第二半径的径向外凸部，该转变发生在与那些部分的共同切线上的点处。 后缘由径向内部线性部分组成，该部分在所选择的过渡位置处转变到具有第三半径的径向外部凸出部分。 该轮廓还包括具有第四半径的凸起的混合部分，其在尖端处将径向外部前部和后部面部共混在一起。 螺纹轮廓在与螺母锚固件的组装期间产生力向量，其提供增强的配合螺纹强度和改进的螺母锚螺纹击穿阻力。

    THREAD LOCKING/PREVAILING TORQUE FASTENER AND FASTENER ASSEMBLY
    4.
    发明申请
    THREAD LOCKING/PREVAILING TORQUE FASTENER AND FASTENER ASSEMBLY 审中-公开
    螺纹锁紧/预紧扭矩紧固件和紧固件总成

    公开(公告)号：WO2009023166A2

    公开(公告)日：2009-02-19

    申请号：PCT/US2008/009586

    申请日：2008-08-11

    Applicant: RESEARCH ENGINEERING & MANUFACTURING, INC. ,  PRITCHARD, Alan

    Inventor： PRITCHARD, Alan

    IPC: F16B39/30

    CPC classification number: F16B39/30

    Abstract: A thread locking fastener assembly comprising a nut anchor defining an internal thread having a longitudinal axis, a leading face and a trailing face, the internal thread, in axial section, having a profile which is symmetric about a first imaginary line extending radially out from the axis, and a fastener shank having an external thread with a longitudinal axis, a leading face and trailing face, the external thread being received in said internal thread so that said axes are substantially coincident. The external thread, in axial section, has a profile with a radially inner base zone which is symmetric about a second imaginary line extending radially from the shank axis and a radially outer deflectable addendum which is not symmetric about that line so that the addendum prevents axial centralization of the external thread profile in the internal thread profile unless a sufficient axial force is applied to the shank to deflect the addendum.

    Abstract translation: 一种螺纹锁定紧固件组件，其包括限定具有纵向轴线，前表面和后表面的内螺纹的螺母锚固件，所述内螺纹在轴向截面中具有轮廓，所述轮廓与从所述内螺纹径向延伸的第一假想线对称 以及具有具有纵向轴线的外螺纹，前表面和后表面的紧固件柄，所述外螺纹被容纳在所述内螺纹中，使得所述轴线基本上重合。 外螺纹在轴向截面中具有轮廓，其具有径向内部基部区域，该径向内部基部区域围绕从杆轴线径向延伸的第二假想线对称，以及径向外部可偏转的齿顶，其不对称于该线，使得齿顶阻止轴向 外螺纹轮廓在内螺纹轮廓中的集中，除非足够的轴向力施加到柄以偏转齿顶。

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