ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,109, issued on June 10.
"Ratchet wrench structure" was invented by Tsan-Chang Lee (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ratchet wrench structure includes a wrench body, a ratchet wheel, a pawl member, and an elastic member. The wrench body has a first receiving recess, and a second receiving recess. The first receiving recess is provided with a first circular arc, a first axis, a first vertical line, a first radius. The second receiving recess is provided with a second circular arc, a second axis, and a second radius. A first distance is defined between the first axis and the second axis. The ratchet wheel is pivotally m...