Daido Steel has patented a high-torque threaded connection for steel pipes featuring male and female wedge threads. The design enhances shear and torque resistance by optimizing the radius of curvature at the load flank of the male threadform, improving contact area and structural integrity. GlobalData’s report on Daido Steel gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Daido Steel, Hydrogen fuel cells was a key innovation area identified from patents. Daido Steel's grant share as of June 2024 was 37%. Grant share is based on the ratio of number of grants to total number of patents.
High-torque threaded connection for steel pipes
The patent US12018777B2 describes a threaded connection specifically designed for steel pipes, comprising a tubular pin and a tubular box. The pin features a male threadform on its outer surface, while the box has a corresponding female threadform on its inner surface, allowing for engagement when the two components are screwed together. Notably, both threadforms include distinct features such as load flanks, stab flanks, thread-crest surfaces, and thread-groove/root surfaces. The design stipulates that the stab-flank pitch is smaller than the load-flank pitch, ensuring that when the connection is made, the load flanks of both threadforms are in contact, as are the stab flanks. Additionally, the patent specifies that the load flank and thread-groove/root surface of the male threadform are connected by a curved surface with a defined radius of curvature, which is dependent on the thread height.
Further claims elaborate on the structural characteristics of the threaded connection, including variations in the curvature of the thread portions and the relationship between the load and stab flanks. The patent outlines specific parameters for the thread profiles, such as pitch differences and minimum thread widths, to ensure optimal engagement and performance of the connection. It also mentions that the steel pipe should have an outer diameter exceeding 240 mm. Overall, the claims detail a sophisticated design aimed at enhancing the reliability and strength of threaded connections in steel pipes, which is critical for various industrial applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
