ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,753,780, issued on Oct. 6, was assigned to Taiyuan University of Technology (Taiyuan, China).
"Control method based on a four-chamber hydraulic cylinder" was invented by Long Quan (Taiyuan, China), Tao Liang (Taiyuan, China), Lianpeng Xia (Taiyuan, China), Xiangyu Wang (Taiyuan, China) and Lei Ge (Taiyuan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An open and closed circuit parallel drive system and a control method based on a four-chamber hydraulic cylinder are provided. The system includes: a closed pump-controlled drive unit and an open valve-controlled drive unit. The four-chamber hydraulic cylinder is driven by the open valve-controlled d...