Travis Underwood,Robert W. Davignon,Timothy Joseph Balz,Benjamin Robert Low
申请号：
US14024956
公开号：
US20140034400A1
申请日:
2013.09.12
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A tracked mobility device includes a frame, a pair of track drives connected to the frame, and a rear wheel assembly that is independent of the track drives. Each track drive has a flexible track rotating around a set of wheels, with each set of wheels including a rear powered wheel, a central weight-bearing wheel, and a front roller wheel. The wheels are fixed to the frame at a height effective to cause the track drive always to have a “V”-shaped lower surface when viewed from the side. The independent rear wheel is at a fixed and constant height with respect to the frame, with the fixed and constant height being effective to allow the rear wheel to cooperate with the lowered central portion of each of said track drives to provide a three-point contact with a flat surface.
