ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,699, issued on Feb. 3, was assigned to FOSITEK Corp. (New Taipei, Taiwan).
"Quick coupler" was invented by An-Szu Hsu (New Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A quick coupler includes a male part externally provided with a radially protruded portion having a slanted pushing surface and a chamfered locating surface, and a female part provided with two circular rows of staggered first and second through holes for receiving first and second steel balls therein, respectively. The female part includes a front and a rear female case and an outer sliding sleeve slidably fitted on the front female case and a spring located outside t...