US 12,115,110 B2
Manual wheelchair propulsion system
Samuel Traxinger, Fresno, CA (US); Mark Greig, Fresno, CA (US); Jefferey Bashian, Fresno, CA (US); and Daniel Zhou, Fresno, CA (US)
Assigned to Sunrise Medical (US) LLC, Fresno, CA (US)
Appl. No. 17/416,801
Filed by Sunrise Medical (US) LLC, Fresno, CA (US)
PCT Filed Dec. 23, 2019, PCT No. PCT/US2019/068377
§ 371(c)(1), (2) Date Jun. 21, 2021,
PCT Pub. No. WO2020/132685, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/784,015, filed on Dec. 21, 2018.
Prior Publication US 2022/0062076 A1, Mar. 3, 2022
Int. Cl. A61G 5/04 (2013.01); A61G 5/02 (2006.01)
CPC A61G 5/047 (2013.01) [A61G 5/027 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A propulsion system for a manual wheelchair, the system comprising:
a mounting clamp configured to attach to the manual wheelchair between two spaced-apart wheelchair drive wheels, the wheelchair drive wheels each defining a wheelchair drive wheel tire patch on a support surface;
a propulsion drive unit selectively attachable to the mounting clamp, the propulsion unit comprising:
a drive wheel assembly defining a drive wheel tire patch, the drive wheel tire patch generally in line with each wheelchair drive wheel tire patch when the drive wheel tire contacts the support surface; and
a support suspension configured to provide linear movement of the drive wheel and a drive hub assembly relative to the manual wheelchair, the support suspension comprising a linear bearing and slide member assembly having at least one linear bearing and a slide member for accommodating the linear movement of the drive wheel assembly and a resilient suspension member providing a tractive effort force to the drive wheel.