公开(公告)号：US20100119327A1

公开(公告)日：2010-05-13

申请号：US12267669

申请日：2008-11-10

Applicant: KUO-CHANG LIN

Inventor： KUO-CHANG LIN

IPC: F16B25/10

CPC classification number: F16B25/103 ,  F16B25/0084

Abstract: A self-drilling screw with multi-drilling portions mainly comprises a shank, a head and a drilling portion separately disposed on both ends of the shank, and a thread section spiraled on the shank. Wherein, at least one sub-drilling portion formed amid the drilling portion and the thread section further defines a sequence of indentations and prominent areas, and each indentation generates a cutting surface outwardly extended from one side thereof so as to converge the cutting surface with the adjacent prominent area at a cutting ridge. Accordingly, the application of the cutting ridges and the indentations facilitates the drilling portion with the chipping capability and renders an appropriate guidance to redundant debris, thereby efficiently achieving a swift screwing and the lowered screwing resistance to promote the screwing efficiency.

Abstract translation: 具有多钻孔部分的自钻螺杆主要包括分别设置在柄的两端上的柄，头部和钻孔部以及螺纹部分在柄上。 其中，在钻孔部分中形成的至少一个副钻孔部分和螺纹部分进一步限定一系列凹痕和突出区域，并且每个压痕产生从其一侧向外延伸的切割表面，以便使切割表面与 相邻的突出区域在切割脊。 因此，切割脊和凹口的应用便于具有切削能力的钻孔部分，并且对多余的碎屑进行适当的引导，从而有效地实现快速旋拧和降低的旋拧阻力以提高螺旋效率。