ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,747,682, issued on Sept. 29, was assigned to WEICHAI POWER Co. LTD. (Weifang, China).

"Valve lift conversion control mechanism and valve system of engine" was invented by Zhijie Li (Weifang, China), Yibao Wang (Weifang, China), Feng Yun (Weifang, China) and Fei Wang (Weifang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A valve lift conversion control mechanism includes a hydraulic transmission device that includes at least two device bodies, a check valve and a solenoid valve. The device bodies are in communication with each other through an oil circuit. The solenoid valve is configured to supply oil to the oil circuit through the check valve....