公开(公告)号：US4628561A

公开(公告)日：1986-12-16

申请号：US776036

申请日：1985-09-13

申请人： Delvin J. Kushniryk

发明人： Delvin J. Kushniryk

IPC分类号： B60P1/43 ,  B65G69/28 ,  E01D1/00 ,  E01D9/00

CPC分类号： B65G69/287 ,  B60P1/435

摘要： A compact ramp construction includes a series of nestable, telescopically extendable modules which are connected via an intermediate module to a base that detachably anchors one end of the ramp to a loading surface and which storably supports the ramp when the modules are nested. In one embodiment, the intermediate module is slidably connected to a pair of inclined slots on the base which raises the intermediate module to clear an edge of the loading surface as the nested modules are telescopically extended and lowered to another surface. Each one of the nestable modules has a pair of parallel side members that are spaced apart by an attached overlapping cross member. A single lug attached to the free end of each side member slidably engages an uppermost surface of a corresponding side member in an adjacent module and cooperates with the cross member of that module to support a load. In another embodiment, the intermediate module is hingedly connected to the base such that when the modules are nested, the ramp is stored by being pivoted about its hinges to lie folded against the base. Instead of a lug at the free end of each side member, the free ends of a second cross member in each module partly overlie corresponding side members of an adjacent module and cooperate with the first cross member thereof to support the load. All of the cross members provide a series of steps in a plane between loading and unloading surfaces.

摘要翻译： 紧凑型斜坡结构包括一系列可嵌套的可伸缩模块，其通过中间模块连接到基座，该基座将斜坡的一端可拆卸地锚定到装载表面，并且当模块嵌套时，可缓动地支撑斜坡。 在一个实施例中，中间模块可滑动地连接到基座上的一对倾斜槽，当嵌套模块可伸缩地延伸和降低到另一表面时，中间模块升高中间模块以清除装载表面的边缘。 可嵌套模块中的每一个具有一对平行的侧部构件，其通过附接的重叠横向构件间隔开。 附接到每个侧构件的自由端的单个凸耳可滑动地接合在相邻模块中的相应侧构件的最上表面，并且与该模块的横向构件配合以支撑负载。 在另一个实施例中，中间模块铰接地连接到基座，使得当模块被嵌套时，斜坡通过围绕其铰链枢转而相对于基座折叠而被储存。 代替在每个侧构件的自由端处的凸耳，每个模块中的第二横向构件的自由端部分地覆盖相邻模块的相应侧构件，并与其第一横向构件协作以支撑负载。 所有横向构件在加载和卸载表面之间的平面中提供一系列步骤。