US 12,252,214 B2
Vehicle power-assist drive systems
Tobias Sebastian Ricco, San Francisco, CA (US); and Amir Kalantari, Oakland, CA (US)
Assigned to Bimotal Inc., Berkeley, CA (US)
Filed by Bimotal Inc., Berkeley, CA (US)
Filed on Sep. 6, 2023, as Appl. No. 18/461,802.
Application 18/461,802 is a continuation of application No. 17/010,757, filed on Sep. 2, 2020, granted, now 11,820,460.
Claims priority of provisional application 62/895,286, filed on Sep. 3, 2019.
Prior Publication US 2023/0406444 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B62M 6/45 (2010.01); B62J 43/13 (2020.01); B62K 3/00 (2006.01); B62L 1/00 (2006.01); B62M 6/90 (2010.01); B62M 7/00 (2010.01); B62M 11/04 (2006.01)
CPC B62M 6/45 (2013.01) [B62J 43/13 (2020.02); B62K 3/00 (2013.01); B62L 1/005 (2013.01); B62M 6/90 (2013.01); B62M 7/00 (2013.01); B62M 11/04 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A vehicle power-assist drive system, comprising:
a drive unit assembly configured to be attached to a frame of a vehicle, the drive unit assembly comprising:
a motor comprising an output shaft;
a pinion gear coupled to the output shaft of the motor;
a drive gear rotatably associated with the output shaft; and
a reduction gearset positioned between the pinion gear and the drive gear, wherein the reduction gearset is configured to reduce a rotational speed of the drive gear relative to a rotational speed of the output shaft,
the drive unit is configured to operably engage a driven unit assembly comprising:
a driven gear configured to be attached to a wheel hub of the vehicle; and
a brake disc coaxially attached to the driven gear, and
the drive gear configured to operably engage the driven gear to transmit power from the motor to the wheel hub.