US 11,857,470 B2
Wheelchair suspension
Robert L. Cuson, LaGrange, OH (US); Robert A. Bekoscke, Medina, OH (US); and Daniel J. Stothard, North Olmsted, OH (US)
Assigned to Invacare Corporation, Elyria, OH (US)
Filed by Invacare Corporation, Elyria, OH (US)
Filed on Aug. 5, 2021, as Appl. No. 17/394,525.
Application 17/394,525 is a division of application No. 15/918,730, filed on Mar. 12, 2018, granted, now 11,096,845.
Application 14/690,678 is a division of application No. 12/900,548, filed on Oct. 8, 2010, granted, now 9,010,470, issued on Apr. 21, 2015.
Application 15/918,730 is a continuation of application No. 14/690,678, filed on Apr. 20, 2015, granted, now 9,913,768, issued on Mar. 13, 2018.
Claims priority of provisional application 61/250,222, filed on Oct. 9, 2009.
Prior Publication US 2021/0369518 A1, Dec. 2, 2021
Int. Cl. A61G 5/06 (2006.01); A61G 5/04 (2013.01); A61G 5/10 (2006.01)
CPC A61G 5/10 (2013.01) [A61G 5/04 (2013.01); A61G 5/042 (2013.01); A61G 5/043 (2013.01); A61G 5/06 (2013.01); A61G 5/1078 (2016.11); A61G 5/1089 (2016.11); B60G 2300/24 (2013.01); Y10S 180/907 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wheelchair comprising:
a frame;
a seat supported by the frame;
at least one front anti-tip wheel coupled to the frame;
first and second drive assemblies each comprising a motor and a drive wheel that is driven by the motor;
a suspension mounting each of the drive assemblies to the frame, the suspension comprising a substantially vertical track and follower assembly having at least one track disposed on the frame and at least one follower disposed on the drive assembly;
at least one rear anti-tip wheel coupled to a pivot arm, the pivot arm pivotably coupled to the frame; and
a coupling member connecting the pivot arm to the drive assembly.