US Patent Issued to MITSUBISHI STEEL on March 31 for "Composite coil spring with carbon and glass fiber layers" (Michigan Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,616, issued on March 31, was assigned to MITSUBISHI STEEL MFG. Co. LTD. (Japan).

"Composite coil spring with carbon and glass fiber layers" was invented by Jun Yoshioka (Canton, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composite coil spring includes a coil body that extends along a coiled axis. The coil body includes a polymer matrix and, disposed in the polymer matrix, a carbon fiber core and a plurality of fiber layers wrapped around the carbon fiber core in alternating oblique fiber angles to the coiled axis. The fiber layers include, from inside-out starting from the carbon fiber core, at least two consecutive carbon fiber interme...