Patent ID: 7347426
Filing Date: 2008-03-25
Classification: A61G,B62D

Abstract:
1. A stair-climbing wheelchair carrier, comprising: a crawler drive unit having a crawler belt that can run on stairs and drive means for driving the crawler belt; a wheelchair carrying unit including a wheelchair carrying floor and a retaining handle standing upright at one end for retaining a wheelchair carried thereon, the wheelchair carrying unit being pivoted at the one end by a shaft to the crawler drive unit; and inclining means for inclining the wheelchair carrying unit at a preset angle relative to the crawler drive unit such that the wheelchair carried on the wheelchair carrying floor is slightly tilted backward from the vertical during ascent or descent of the stairs, wherein the inclining means stops or starts tilting the wheelchair carrying unit based on a detection signal from an inclination sensor provided in the crawler drive unit, wherein when the crawler drive unit is flat, the inclining means stops tilting the wheelchair carrying unit at an intermediate angle of the present angle, wherein when the crawler drive unit is tilted, the inclining means tilts the wheelchair carrying unit up to the preset angle, and wherein as soon as the crawler drive unit is detected to be flat after the ascent or the descent of stairs, the inclining means drives the wheelchair carrying unit to decrease its inclination angle relative to the crawler drive unit.