Patent ID: 8408343
Filing Date: 2013-04-02
Classification: A61G,B60K,B60Y,B62D,Y10S

Abstract:
1. A wheelchair comprising: a frame; a drive wheel defining a drive wheel axis a mounting plate pivotally coupled to the frame at a pivot axis, the pivot axis being positioned forward of the drive wheel axis; a mounting plate pivotally coupled to the frame at a pivot axis, the pivot axis being positioned forward of the drive wheel axis; a drive operatively coupled to the drive wheel and affixed to the mounting plate; a forward-extending front arm rigidly extending from the mounting plate such that the mounting plate, drive, and front arm are together configured to pivot about the pivot axis; a front wheel rotatably coupled to the front arm, the front wheel defining a front wheel axis, wherein a vertical position of the pivot axis with respect to the ground plane is spaced from and positioned relatively below a line drawn between the drive wheel axis and the front wheel axis when the drive wheels and front wheels are on level ground, whereby motor torque biases the front wheel.