作者: Stephen R. Early
DOI:
关键词:
摘要: A handrail assembly for access walkways on railway hopper cars is movable between a retracted position, where the stored transit, and an extended position posts rails of are raised to provide protective barrier. The pivotally interconnected parallel linkage, each swinging about axis that displaced from right angle longitudinal walkway. Also, inclined vertical when in its position. combined effect displacement inclination maintains components within allowable clearances precludes interference with top surface car body. counterweight arrangement allows be easily manually one end car, mechanical lock provided positively retain either or