ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,061, issued on Feb. 3, 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: "A lifting mechanism has a descending mode including an energy-regeneration mode and a non-energy-regeneration mode. The lifting mechanism includes: a battery, an electric machine, a hydraulic pump, an oil tank, a hydraulic cylinder, a work platform and a flow limiting valve. In the energy-regeneration mode, the hydraulic fluid drives the hydraulic pump to ope...