Patents Assigned to Chen Nan Iron Wire Co., Ltd.
  • Screw structure
    Patent number: 11149776
    Abstract: A screw structure is disclosed herein. It comprises a head; a rod body integrally extended from the head and having a flat shank part and a tapered tip at a terminal of the flat shank part; a first screw thread disposed on the rod body and having a positioning tooth at a terminal thereof, a plurality of cutting units and a plurality of shaving collection spaces; a plurality of second screw threads disposed on the rod body; and a reamer thread disposed at an upper end of the rod body.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: October 19, 2021
    Assignee: Chen Nan Iron Wire Co., Ltd.
    Inventor: Ching-An Hu