Patent ID: 9579242
Date: 2017-02-28
CPC Classifications: A61G,B60G,B60K,B60Y,Y10S

Claim:
1. A wheelchair comprising: a substantially horizontal seat having a front end and a rear end, a substantially vertical back rest proximal the rear end of the substantially horizontal seat, and a central chassis frame; a pair of front link arms proximal the front end of the wheelchair, each front link arm pivotally connected to the chassis frame at a respective first pivot axis, each front link arm having a portion extending forward of the first pivot axis and a rearward portion extending rearward of the first pivot axis; a pair of rear link arms proximal the rear end of the wheelchair, each rear link arm pivotally connected to the chassis frame at a respective second pivot axis rearward of the first pivot axis, each rear link arm having a portion extending rearward of the second pivot axis and a forward portion extending forward of the second pivot axis to overlap, at least in part, with the rearward portion of the corresponding front link arm; a pair of drive assemblies comprising a drive wheel, each drive assembly non-pivotally and fixedly mounted to at least one of the chassis frame or an adjacent one of the pair of front link arms; and the rearward portion of each front link arm being coupled to the forward portion of the adjacent rear link arm to allow relative movement between each front link arm and the adjacent rear link arm such that when the front link arm pivots about the first pivot axis in a first direction, the rear link arm pivots about the second pivot axis in a second direction opposite the first direction.