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    Multi-sectional Drilling and Tapping Apparatus
    3.
    发明申请
    Multi-sectional Drilling and Tapping Apparatus 审中-公开

    公开(公告)号：US20170136564A1

    公开(公告)日：2017-05-18

    申请号：US14979438

    申请日：2015-12-27

    申请人： Shajeng Hardware Co., Ltd.

    发明人： Jen-Tsung Liao

    IPC分类号： B23G5/20 ,  B23G5/06

    CPC分类号： B23G5/20 ,  B23B51/009 ,  B23B51/08 ,  B23G2200/143 ,  B23G2200/34 ,  B23G2200/46 ,  B23G2200/48

    摘要： A multi-sectional drilling and tapping apparatus includes a shank, a drill and a tap that are made in one piece. The shank is formed at an end while the drill is formed at another end. The drill includes a small section formed between a tip and a large section. The drill further includes helical blades extending to the shank from the tip. The tap includes helical ribs each extending from a corresponding one of the helical blades and groups of tooth-shaped blades each evenly arranged along a corresponding one of the helical ribs. The tap includes a diameter larger than that of the large section of the drill.

    Iron-Cutting Drill
    4.
    发明申请
    Iron-Cutting Drill 审中-公开
    铁切割钻

    公开(公告)号：US20160158851A1

    公开(公告)日：2016-06-09

    申请号：US14564133

    申请日：2014-12-09

    申请人： Shajeng Hardware Co., Ltd.

    发明人： Jen Tsung Liao

    IPC分类号： B23B51/04

    CPC分类号： B23B51/0406 ,  B23B2222/44 ,  B23B2251/046 ,  B23B2251/408

    摘要： An iron-cutting drill includes a shank and two threaded section. The first threaded section extends from an end of the shank and includes a helical groove made of a helix angle smaller than 45°. The second threaded section extends from the first threaded section and includes several helical grooves, a cavity, several apertures and several blades. The helical grooves of the second section are in communication with the helical groove of the first threaded section. The helical grooves of the second section are made with a helix angle larger than 45°. The cavity is axially made in a free end of the second threaded section. The apertures are in communication with the cavity. The blades are formed around the cavity.

    摘要翻译： 铁切割钻头包括柄和两个螺纹部分。 第一螺纹部分从柄的端部延伸并且包括由小于45°的螺旋角制成的螺旋槽。 第二螺纹部分从第一螺纹部分延伸并且包括若干螺旋槽，空腔，多个孔和多个叶片。 第二部分的螺旋槽与第一螺纹部分的螺旋槽连通。 第二部分的螺旋槽由大于45°的螺旋角制成。 空腔轴向地制成在第二螺纹部分的自由端。 孔与空腔连通。 刀片围绕腔形成。