Abdelhafid Bouhraoua,Nesar Merah,Jaseem Al-Muaybid,Abduljabar Al Sayoud,Ayman Al-Darweesh,Jawad J. Al-Dawoud
申请号：
US13785823
公开号：
US08596388B2
申请日:
2013.03.05
申请国别(地区):
US
年份:
2013
代理人:
摘要：
The stair-climbing apparatus has a series of articulating wheel sets extending below the platform. All of the wheel sets are vertically adjustable to negotiate stairways and similar changes of elevation. The lead wheel set is fixed longitudinally relative to the platform, while following wheel sets are longitudinally adjustable to adjust for the pitch or slope of different stairways. The apparatus uses sensors (e.g., mechanical, infrared, ultrasonic, etc.) to detect the presence of the stair risers and their height, control of the assembly being accomplished by a control circuit on board the machine. The wheel sets are raised and lowered independently of one another by pantograph mechanisms extending between the platform and the wheel sets. The horizontally adjustable wheel sets are positioned by a longitudinally disposed rack on the platform.
