ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,473,872, issued on Nov. 18.
"Combined sealing piece, volumetric machine and wide fuel engine" was invented by Zhiqiang Ding (Guangdong, China) and Junhao Ding (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a combined sealing piece, a volumetric machine and a wide fuel engine using the combined sealing piece. The combined sealing piece includes a slider with a main sealing piece. The combined sealing piece further includes at least one auxiliary sealing piece, a first auxiliary sealing piece is backed against the slider or leans against the main sealing piece and the slider at the same time, and an elastic member is dispose...