MUMBAI, India, Aug. 22 -- Intellectual Property India has published a patent application (202517068194 A) filed by Hardlock Industry Co. Ltd., Osaka, Japan, on July 17, for 'screw structure.'
Inventor(s) include Wakabayashi, Katsuhiko.
The application for the patent was published on Aug. 22, under issue no. 34/2025.
According to the abstract released by the Intellectual Property India: "The present invention enables generation of a locking effect by means of prevailing torque while reducing the proportion of a distribution load of a fastening axial force applied to a first screw thread. In this screw structure comprising a bolt 1 and a nut 2, a female screw 20 of the nut 2 has: a first screw region 21; and a second screw region 22 in which flank surfaces 22a, 22b are formed in a protruding circular arc shape. In a state where the female screw 20 is being screwed into a male screw 10 of the bolt 1, in the first screw region 21, the compression-side flank surface 21a comes into contact with the male screw 10 while a gap is formed between the play-side flank surfaces 21b, 10b, and, in the second screw region 22, the compression-side and play-side flank surfaces 22a, 22b of the female screw 20 respectively come into contact with the compression-side and play-side flank surfaces 10a, 10b of the male screw 10."
The patent application was internationally filed on Dec. 28, 2023, under International application No.PCT/JP2023/047272.
Disclaimer: Curated by HT Syndication.
