ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,220,880, issued on Feb. 11, was assigned to HITACHI ASTEMO LTD. (Ibaraki, Japan).
"Method for producing tube body" was invented by Takahiro Nakayama (Ibaraki, Japan), Kenichi Mori (Ibaraki, Japan) and Kazuki Ohta (Ibaraki, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tube body production method includes: a disposing step of disposing carbon fibers with respect to an outer circumferential surface of a mandrel so that the carbon fibers extend in the axial direction of the mandrel; and a molding step of impregnating the fiber body with a resin on the outer circumferential surface of the mandrel and then heating the resin to mold the resin, wherei...