ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,579, issued on Feb. 3.

"Self-adaptive self-locking clamping apparatus" was invented by Geng Yan (Calgary, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "The self-adaptive self-locking clamping apparatus comprises a pair of arms pivotally interconnected to each other via a fulcrum either in the middle or on one end of the pair of arms, forming a pair of jaws with at least a variable gap for load, a fulcrum and a pair of handles for effort. The pair of handles engage with each other via a pawl and ratchet mechanism to achieve directional self-locking function, so that the clamping force applied to the pair of handles are maintained after such cl...