Westinghouse Air Brake Technologies Corporation
Interlock for Lift Outer Roll Stop

Abstract:

An outer roll stop for a wheelchair lift includes a base having a leading end, a trailing end, a top surface, and a bottom surface positioned opposite from the top surface, a top plate secured to the base, with the top plate moveable relative to the base, and an interlock assembly comprising a sensor positioned between the top plate and the base, with the sensor having a first state and a second state. The sensor moving from the first state to the second state when an object is positioned on the top plate. The sensor is configured to detect when an object is positioned on the top plate prior to motion of the outer roll stop.