High vertical lift bridge
    3.
    发明授权
    High vertical lift bridge 失效
    高垂直起重桥

    公开(公告)号:US3570032A

    公开(公告)日:1971-03-16

    申请号:US3570032D

    申请日:1969-03-07

    发明人: ALLEN EARLE F

    IPC分类号: E01D15/02 E02B17/08

    CPC分类号: E02B17/0854 E01D15/02

    摘要: THE INVENTION IS A VERTICAL LIFT BRIDGE WHICH IS RAISED UTILIZING HYDRAULICALLY DRIVEN PISTONS. IN ORDER THAT THE BRIDGE MAY BE RAISED TO A SUBSATANTIALLY HEIGHT, THE HYDRAULIC DRIVE SYSTEM IS ARRANGED TO RAISE THE BRIDGE IN A SERIES OF STEPS. THUS, EACH HYDRAULIC DRIVE MOTOR OPERATES ON A VERTICAL RAIL OR CHANNEL USING RELEASABLE GRIPPING SHOES

    WHICH PERMITS THE DRIVE CYLINDER TO BE FULLY EXTENDED A NUMBER OF TIMES SO THAT THE BRIDGE MAY BE RAISED TO A HEIGHT EQUAL TO MULTIPLES OF THE STROKE OF THE HYDRAULIC DRIVE MOTOR.