ALEXANDRIA, Va., April 21 -- United States Patent no. 12,604,988, issued on April 21, was assigned to Comfordy Co. Ltd. (Tainan City, Taiwan).
"Lifting mechanism for armrest" was invented by Yu-Ling Wu (Tainan City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A lifting mechanism for armrests is provided. A control rod of a control unit is mounted in a support unit disposed in a cavity of a guide unit. Positioning balls are mounted in through holes on two sides of the support unit for being locked in or separated from positioning recesses on two side walls of the cavity. When the control rod is pulled upward for height adjustment of the armrest, the positioning balls are fallen into concave portions...