ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,222, issued on May 27, was assigned to DANFOSS POWER SOLUTIONS (JIANGSU) Co. LTD (Jiangsu, China) and DANFOSS POWER SOLUTIONS INC. (Ames, Iowa).
"Lifting mechanism" was invented by Zhekang Du (Nordborg, Denmark) and Xiaozhong Chen (Nordborg, Denmark).
According to the abstract* released by the U.S. Patent & Trademark Office: "The lifting mechanism includes a battery, an electric machine, a hydraulic pump, an oil tank, a hydraulic cylinder, a work platform and a proportional valve or switch valve. In the energy-regeneration mode, the hydraulic fluid drives the hydraulic pump to operate as a hydraulic motor, thus in turn driving the electric machine to operate as a generator and ch...