ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,496,688, issued on Dec. 16, was assigned to HANGZHOU GREAT STAR INDUSTRIAL Co. LTD. (Hangzhou, China).
"Ratchet mechanism and hand tool" was invented by Yueming Li (Hangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ratchet mechanism includes: a first member having an annular surface provided with a plurality of teeth arranged parallel to its axial direction; a second member configured to be rotatable relative to a circumferential direction of the annular surface; at least two first drive transmission members arranged on the second member, each including at least one ratchet tooth, the first drive transmission members being configured to b...