ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,411, issued on May 5, was assigned to Zhuhai Pristar Technology Co. Ltd. (Zhuhai City, China).
"Oil pump" was invented by Zeng Yang (Zhuhai, China), Haihua Pan (Zhuhai City, China) and Guohui Chen (Zhuhai City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An oil pump includes an oil outlet part, a hollow oil conveying pipeline, an oil pumping part, and a sealing part. An oil outlet opening is defined in the oil outlet part. The oil conveying pipeline is provided with a first liquid channel. A first oil pumping opening is defined in the oil pumping part. The oil pumping part is connected to the oil outlet part through the oil conveying pipeline...