US 12,441,432 B1
Bicycle with backup braking
Muhammad Asad, Dhahran (SA); Muhammad Azhar Ali Khan, Dhahran (SA); Mushtaq Khan, Dhahran (SA); Abdul Aziz Afzal, Dhahran (SA); Alanood Almoaikel, Dhahran (SA); Bayan Aljishi, Dhahran (SA); Lujain Alshuhail, Dhahran (SA); and Zainab Alsaigh, Dhahran (SA)
Assigned to PRINCE MOHAMMAD BIN FAHD UNIVERSITY, Dhahran (SA)
Filed by PRINCE MOHAMMAD BIN FAHD UNIVERSITY, Dhahran (SA)
Filed on Jun. 6, 2025, as Appl. No. 19/231,257.
Int. Cl. B62L 1/00 (2006.01); B60B 1/00 (2006.01); B62K 3/02 (2006.01); B62L 1/02 (2006.01)
CPC B62L 1/005 (2013.01) [B60B 1/003 (2013.01); B62K 3/02 (2013.01); B62L 1/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A bicycle, comprising:
a front wheel,
a rear wheel,
a main frame to which the front and rear wheels are rotatably attached, and
a brake system interoperatively connecting the main frame and the rear wheel;
wherein the brake system is connected to the rear wheel and comprises:
a hub,
a rim,
spokes extending between the hub and the rim,
a rod extending between the hub and the rim,
a helical spring surrounding the rod and having a fixed end attached to the hub and a free end capable of moving along a longitudinal direction of the rod, and
a brake mass structure attached to the free end of the helical spring, being capable of moving along the longitudinal direction of the rod and comprising a pin structure;
the main frame connected to the hub of the rear wheel; and
an extension structure comprising
a spacing segment that extends from the main frame, and
a hook segment spaced apart from the hub by the spacing segment and having a groove formed therein which is configured to engage with the pin structure of the brake mass structure;
wherein the main frame comprises a first rear drop out and a second rear drop out positioned on a first side and a second side of the rear wheel, respectively,
wherein the spacing segment of the extension structure is in direct contact with and extends from at least one of the first rear dropout and the second rear drop out of the main frame,
wherein when the rear wheel rotates, the brake mass structure is configured to move away from the hub along the longitudinal direction of the rod,
wherein when the rear wheel rotates at or above a speed threshold, the brake mass structure is configured to move away from the hub along the longitudinal direction of the rod so that the pin structure of the brake mass structure engages with the groove of the hook segment of the extension structure to stop the rear wheel from accelerating.