ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,733, issued on May 20.
"Buckle for dumbbells and barbells" was invented by Yiheng Zhang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A buckle for dumbbells and barbells includes a clamping head, two locking keys symmetrically mounted on the clamping head, and two operation bars symmetrically mounted on the clamping head and hinged to the locking keys. The clamping head is a C-shaped structure having an opening at one end thereof. An accommodating groove and two mounting holes in communication with each other are formed in the clamping head. The accommodating groove is located on an outer side of the clamping head away from the op...