ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,186, issued on Feb. 24, was assigned to SANY HEAVY MACHINERY Ltd. (Jiangsu, China).

"Supporting wheel shaft, supporting wheel and work machine" was invented by Xiaokang Hu (Jiangsu, China), Chuandong Sun (Jiangsu, China) and Zhongwei Cheng (Jiangsu, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A supporting wheel shaft, a supporting wheel and a work machine. The supporting wheel shaft includes an oil inlet, provided near a middle portion of the supporting wheel shaft and used to communicate with a first oil storage chamber on a wheel body of a supporting wheel; a first oil outlet, provided close to a first end of the supporting wheel shaft an...