公开(公告)号：WO2008156425A1

公开(公告)日：2008-12-24

申请号：PCT/SG2007/000172

申请日：2007-06-20

Applicant: UNISTEEL TECHNOLOGY LIMITED ,  KARUPAYA, Balasingam

Inventor： KARUPAYA, Balasingam

IPC: F16B33/02 ,  B21H3/04

CPC classification number: B21H3/06 ,  F16B25/0047

Abstract: A thread forming screw thread fastener and a corresponding thread roll die are disclosed for fastening into a hole of a workpiece composed of low ductility material. More specifically, the thread forming screw thread has smooth radius thread flank which has a capability of deforming low ductile material such as magnesium, soft aluminum, thermoset plastics and other low ductility materials to deform the ductile material efficiently minimizing cracks, debris, low friction during installation and a maximum engagement of the screw with mating parts with the ductile material.

Abstract translation: 公开了一种螺纹成形螺纹紧固件和相应的螺纹辊压模，用于紧固到由低延展性材料构成的工件的孔中。 更具体地说，螺纹成型螺纹具有平滑的半径螺纹侧面，其具有使诸如镁，软铝，热固性塑料和其他低延展性材料的低延性材料变形的能力，以使延性材料变形，有效地使裂纹，碎屑，低摩擦力最小化 安装和螺钉与配合部件与延性材料的最大啮合。

公开(公告)号：WO2010093329A1

公开(公告)日：2010-08-19

申请号：PCT/SG2009/000047

申请日：2009-02-16

Applicant: UNISTEEL TECHNOLOGY LIMITED ,  KARUPAYA, Balasingam

Inventor： KARUPAYA, Balasingam

IPC: F16B33/02 ,  F16B25/00 ,  B21H3/06 ,  F16B25/04

CPC classification number: B21H3/027 ,  F16B23/0053 ,  F16B25/0015 ,  F16B25/0047

Abstract: A thread forming screw thread fastener for fastening into a hole formed by the fastener in a work piece, the fastener comprising: a head having a drive to be engaged with a driver bit; and a shank with threads having a symmetrical thread profile with a minor diameter and a major diameter, the major diameter defining a thread crest of the screw thread, and the minor diameter defining the thread root of the screw thread, the profile of the screw thread defined by the surface of the screw thread between adjacent thread crests forming a thread flank, the thread flank having a first central portion of constant radius along the thread root, the radius common at the thread root, at each adjacent thread crests, and at two transition intersection points, the profile of the thread flank having second and third portions defined by surfaces having different radii of curvature between each transition intersection point and each adjacent thread crest.

Abstract translation: 一种螺纹形成螺纹紧固件，用于紧固在由紧固件形成在工件中的孔中，所述紧固件包括：头部，其具有与驱动器钻头接合的驱动器; 以及具有具有小直径和大直径的对称螺纹轮廓的螺纹的柄，所述主直径限定所述螺纹的螺纹牙顶，所述小直径限定所述螺纹的螺纹根部，所述螺纹的轮廓 由形成螺纹牙齿的相邻螺纹牙顶之间的螺纹表面限定，螺纹牙齿沿着螺纹根具有恒定半径的第一中心部分，在螺纹根部处共同的半径，在每个相邻的螺纹牙顶处，并且在两个 过渡交叉点，具有由每个过渡交叉点和每个相邻螺纹牙顶之间具有不同曲率半径的表面限定的第二和第三部分的螺纹齿的轮廓。

公开(公告)号：WO2010093330A1

公开(公告)日：2010-08-19

申请号：PCT/SG2009/000048

申请日：2009-02-16

Applicant: UNISTEEL TECHNOLOGY LIMITED ,  KARUPAYA, Balasingam

Inventor： KARUPAYA, Balasingam

IPC: F16B39/30 ,  F16B25/00 ,  F16B33/02 ,  B21H3/06 ,  F16B25/04

CPC classification number: B21H3/025 ,  F16B25/0015 ,  F16B25/0047 ,  F16B25/0078 ,  F16B39/30

Abstract: A torque retention screw thread fastener and corresponding thread roll die to manufacture the screw thread fastener is disclosed. The torque retention thread forming screw comprises retention elements in the thread valley of the screw thread which reduces retro-grade rotation due to vibration loosening, and contributes to a reliable joint, to provide superior clamp load in the joint when the screw thread fastener is fully tightened and reduces the possibility of stripped assemblies.

Abstract translation: 公开了一种用于制造螺纹紧固件的扭力保持螺纹紧固件和相应的螺纹辊模。 扭矩保持螺纹成形螺钉包括螺纹螺纹凹槽中的保持元件，其减少由于振动松动而引起的后退转动，并且有助于可靠的接头，以便当螺纹紧固件完全固定时在接头中提供优异的夹紧载荷 拧紧并减少拆卸组件的可能性。

公开(公告)号：WO2008136765A1

公开(公告)日：2008-11-13

申请号：PCT/SG2008/000148

申请日：2008-04-30

Applicant: UNISTEEL TECHNOLOGY LIMITED ,  KARUPAYA, Balasingam

Inventor： KARUPAYA, Balasingam

IPC: F16B23/00 ,  B21H3/00 ,  B21K1/46 ,  B25B23/00 ,  B25B29/00 ,  B29B15/02 ,  F16B27/00 ,  F16B35/06

CPC classification number: B25B15/005 ,  B21K1/463 ,  B21K5/20 ,  F16B23/003 ,  F16B35/041

Abstract: A fastener with a recess head wherein the drive head has four lobular recess channels. Each channel comprises a first wall, a second wall, a bottom surface and a recess sidewall. The first and second walls have portions opposing each other and a constant radius of curvature to form a continuously and smoothly forming wall of the channel. A torque producing driver tool is defined with cross sectional signature substantially complementary in size and shape of the recess of the drive head of the fastener for matable engagement. A recess punch for manufacturing the fastener is also defined and comprises a punch holder and a punch pin integral with the holder.

Abstract translation: 具有凹头的紧固件，其中驱动头具有四个小叶凹槽。 每个通道包括第一壁，第二壁，底表面和凹陷侧壁。 第一和第二壁具有彼此相对的部分和恒定的曲率半径以形成通道的连续且平滑的形成壁。 扭矩产生驱动器工具被限定为具有与紧固件的驱动头的凹部的尺寸和形状基本上互补的横截面签名件，用于可配合接合。 用于制造紧固件的凹部冲头也被限定，并且包括冲头保持器和与保持器一体的冲头销。