ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,168, issued on June 10, was assigned to MITSUBISHI STEEL MFG. Co. LTD. (Tokyo).
"Opening and closing mechanism" was invented by Yasuhiro Mitsui (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An opening/closing mechanism includes: opening/closing member including rotating portion on rotation axis; and cam member to face the rotating portion of the opening/closing member on the rotation axis and to apply a load to rotation of the rotating portion. One of the cam member and the rotating portion includes: at least one first-cam-projection provided on first circumference having the rotation axis as center; and at least one second-cam-projec...