公开(公告)号：US09856654B1

公开(公告)日：2018-01-02

申请号：US15362309

申请日：2016-11-28

申请人： Wallace Tagart ,  Yvonne Tagart

发明人： Wallace Tagart ,  Yvonne Tagart

IPC分类号： E04F11/06 ,  E04F11/00 ,  A01K1/035 ,  E06C1/38 ,  E06C1/39

CPC分类号： E04F11/062 ,  A01K1/035 ,  E04F11/002 ,  E04F2011/005 ,  E06C1/005 ,  E06C1/38 ,  E06C1/39

摘要： A collapsible stair with foldable ramp can include a first step, and a second step nestable within the first step such that when the collapsible stair is in a closed position the second step is aligned with the first step and when the collapsible stair is in an open position a lateral offset between the second step and the first step is increased. A third step can be nestable within the first step such that when the collapsible stair is in a closed position the third step is aligned with the second step and is in an open position a lateral offset between the third step and the second step is increased. A ramp can be rotatably coupled to the first step to rotate from a stair position to a ramp position, wherein the ramp position comprises the second step and the third step being covered by the ramp.