MUMBAI, India, June 19 -- Intellectual Property India has published a patent application (202617058358 A) filed by Nhk Spring Co. , Ltd. on May 07, 2026, for Coil Spring And Suspension For Vehicle.
Inventors include Furuse, Takeshi; Moriyama, Senri; Tanaka, Yusuke; and Nishizawa, Shinichi.
The application for the patent was published on June 05, 2026, under issue no. 23/2026.
Abstract: A coil spring (1B) includes a wire rod (2) including a round section portion (30) and a flat section portion (100). The round section portion(30) includes a first cross section (S1) whose cross section is round. The flat section portion (100) includes a second cross section (S2) that is flat. The second cross section (S2) has a width greater than or equal to the diameter of the first cross section (S1) and a thickness less than the width. A polar moment of inertia of area of the second cross section (S2) is smaller than that of the first cross section (S1). A variable section portion (32) is formed between the round section portion (30) and the flat section portion (100). The variable section portion (32) changes its cross section from circular to flat from the round section portion (30) towards the flat section portion (100).
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