ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,965, issued on Dec. 9, was assigned to TIEN HSIN INDUSTRIES Co. LTD. (Taichung, Taiwan).
"Hub motor" was invented by Chun-Wei Chen (Taichung, Taiwan) and Chang-Chun Kao (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hub motor includes an axle, a stator, a rotor, a casing, a sleeve, and a torque sensor. The axle is fixed to a frame of the bicycle and has a first end and a second end. The stator is fixed to the axle. The rotor is rotatably sleeved on the axle and rotates around the stator. The casing is rotatably sleeved on the axle and rotates around the rotor and the axle. The casing forms an accommodating space, a first perforati...