ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,901, issued on May 27, was assigned to FUJIFILM Corp. (Tokyo).
"Lens barrel" was invented by Hiroyuki Iwasaki (Saitama, Japan), Yuichi Kawanabe (Saitama, Japan) and Shinji Otsuka (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a lens barrel capable of improving stop accuracy. A roller support shaft (61) is attached to an outer peripheral portion of a cam cylinder (16). A torque applying roller (102) is rotatably supported by the roller support shaft (61). A biasing ring (104) is fitted to an outer peripheral portion of a second fixed cylinder (12B) and is held to be movable in an axial direction. The biasing ring (104) is ...