US Patent Issued on Oct. 14 for "Propeller mother and child transmission assembly with dual protection" (Chinese Inventor)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,441,448, issued on Oct. 14.

"Propeller mother and child transmission assembly with dual protection" was invented by Zhidong Fu (Qingdao, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A propeller mother and child transmission assembly with dual protection is provided, which includes a child transmission shaft sleeve and a mother transmission shaft sleeve. An outer peripheral surface of the child transmission shaft sleeve is fixedly provided with a plurality of first transmission protrusions and a plurality of second transmission protrusions, each of the first transmission protrusions and each of the second transmission protrusions are arranged alt...