ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,214, issued on March 18, was assigned to Bimotal Inc. (Berkeley, Calif.).
"Vehicle power-assist drive systems" was invented by Tobias Sebastian Ricco (San Francisco) and Amir Kalantari (Oakland, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power-assist drive system for a vehicle (e.g., a bicycle) is provided. The system includes a drive unit assembly attached to a frame of a vehicle and a motor having an output shaft, and a drive gear rotatably associated with the output shaft. The system further includes a driven unit assembly including a driven gear configured to be attached to a wheel hub of the vehicle, and a brake disc coaxially att...