ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,650, issued on June 3.
"Locking mechanism for dumbbell and dumbbell using the same" was invented by Lingying Hu (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dumbbell comprises a dumbbell body, a base and a locking mechanism, wherein the dumbbell body comprises a handle and a plurality of weight plates, a plate selection mechanism is arranged between the handle and the weight plates, and plate selection mechanism locks the weight plates by rotating the handle; when the weight plates are locked by the plate selection mechanism, the locking mechanism is in a released state, and when the weight plates are not locked by the plate sele...