ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,407, issued on Jan. 20, was assigned to Yili Industrial U.S. Co. Ltd. (Grand Rapids, Mich.).
"Lockable gas spring" was invented by Duanzhong Ying (Ningbo, China) and Libin Wang (Ningbo, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gas spring includes an outer tube, an inner tube disposed within the outer tube and attached to a floating piston radially sealed between the outer tube and the inner tube and axially slidable within the outer tube, a chamber defined between the inner tube and the outer tube, a valve piston sealingly slidable within the inner tube, a piston rod fixed to the valve piston, a spacer fixed to the outer tube and axial...