公开(公告)号：US3882563A

公开(公告)日：1975-05-13

申请号：US39473673

申请日：1973-09-06

Applicant: OVERHEAD DOOR CORP

Inventor： SMITH VERNON O ,  MOSSBARGER GEORGE E

IPC: B65G69/28 ,  B65G11/00

CPC classification number: B65G69/2841

Abstract: A dock leveler having a swingable ramp positioned for engagement with a truck bed. The front end of the ramp is normally urged upwardly by a spring-urged lift arm mounted within a pit in the dock. The ramp is movable through a selected angle, both above and below a horizontal position, to accommodate different truck bed heights and to adjust to variations therein. A hold-down mechanism coacts between the frame and the lift arm for normally preventing the lift arm from urging the upward movement of said ramp while permitting downward movement thereof. The ramp is free of positive connection to the lift arm and can thus be swung upwardly, such as due to the normal raising of a truck bed when a load is removed therefrom.

Abstract translation: 具有摆放斜坡的码头调平器，其定位成与卡车车床接合。 斜坡的前端通常由安装在码头的坑内的弹簧推动的提升臂向上推动。 斜坡可以在水平位置上方和下方的选定角度移动，以适应不同的卡车高度并适应其中的变化。 压紧机构在框架和提升臂之间共同作用，以正常地防止提升臂在允许其向下移动的同时推动所述斜坡的向上运动。 斜坡没有与升降臂的正向连接，因此可以向上摆动，例如由于在卸载载荷时卡车底座的正常升高。