US Patent Issued to Zhejiang Tingjing Intelligent Technology on April 21 for "Weight-adjustable dumbbell apparatus" (Chinese Inventor)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,583, issued on April 21, was assigned to Zhejiang Tingjing Intelligent Technology Co. Ltd. (Jinhua, China).

"Weight-adjustable dumbbell apparatus" was invented by Changsheng Fu (Jinhua, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A weight-adjustable dumbbell apparatus is disclosed, comprising a handle, a primary dumbbell plate, and one or more secondary dumbbell plates. A connection assembly rotationally couples adjacent plates. The assembly features a protrusion member extending from a first plate that engages a locking plate within a receiving recess on a second plate. Relative rotation between the plates creates a mechanical interferenc...