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    • 1. 发明授权
    • Fastening element
    • 紧固件
    • US07850409B2
    • 2010-12-14
    • US12286010
    • 2008-09-26
    • Georg OberndorferMichael SplittMarc SchaefferSimon OppeneigerJuergen Gebhard
    • Georg OberndorferMichael SplittMarc SchaefferSimon OppeneigerJuergen Gebhard
    • F16B25/10
    • F16B25/0026F16B25/0052
    • A fastening element has a shaft (12), and a tapping thread (21) carried by the shaft (12) and having at least one screw thread (22, 42) a section (23; 43) of which that adjoins the thread pilot (35), having a plurality of following one another thread steps (24, 25, 26, 27; 44, 45, 46, 47) having different cross-sections, with a cross-section of the at least one screw thread (22; 42) decreasing stepwise toward the thread pilot (35) from a thread step (24, 25, 26, 27; 44, 45, 46, 47) to a thread step (24, 25, 26, 27; 44, 45, 46, 47), with the thread steps (24, 25, 26, 27; 44, 45, 46, 47) having respective cutting edge-forming end surfaces (28, 29, 30, 31; 48, 49, 50, 51) aligned, at least partially, in a direction of the thread pilot (35).
    • 紧固元件具有轴(12)和由所述轴(12)承载并且具有至少一个螺纹(22,42)的攻丝(21),所述螺纹(22; 42)与所述螺纹导向件 (35),具有多个跟随的另一个具有不同横截面的螺纹台阶(24,25,26,27,44,45,46,47),所述至少一个螺纹(22)的横截面 42)从螺纹台阶(24,25,26,27; 44,45,46,47)向所述螺纹导程(35)逐步减小到螺纹台阶(24,25,26,27; 螺纹台阶(24,25,26,27,44,45,46,47)具有相应的切削刃形成端面(28,29,30,31; 48,49,50,51) )至少部分地沿所述螺纹导程(35)的方向对准。