US 12,458,548 B1
Wheelchair with emergency brake system
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. 19/231,053.
This patent is subject to a terminal disclaimer.
Int. Cl. A61G 5/10 (2006.01); F16D 59/00 (2006.01); F16D 65/22 (2006.01); F16D 121/14 (2012.01)
CPC A61G 5/1016 (2013.01) [F16D 59/00 (2013.01); F16D 65/22 (2013.01); F16D 2121/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wheelchair with emergency brake system, comprising:
a wheelchair and a brake system;
wherein the wheelchair has a braking wheel equipped with the brake system,
wherein the wheelchair comprises a main frame, a seat supported by the main frame, an upper frame, a backrest supported by the upper frame, two front wheels connected to the main frame and two rear wheels connected to the main frame, wherein the braking wheel is a one of the two rear wheels;
wherein the braking wheel 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;
wherein the main frame is connected to the hub of the braking 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 when the braking wheel rotates, the brake mass structure is configured to move away from the hub along the longitudinal direction of the rod,
wherein when the braking 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 wheelchair from accelerating.