A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The present invention is directed to a collapsible ladder system comprising a first ladder rail and a second ladder rail connected by a plurality of rungs, a base rail assembly comprising a first base rail pivotably connected to both the first ladder rail and a lower support brace, wherein the lower support brace is pivotably connected to an upper support brace that is pivotably connected to the first ladder rail, a second base rail pivotably connected to both the second ladder rail and a lower support brace, wherein the lower support brace is pivotably connected to an upper support brace that is pivotably connected to the second ladder rail.
The present invention is directed to a collapsible ladder system comprising a first ladder rail and a second ladder rail connected by a plurality of rungs, a base rail assembly comprising a first base rail pivotably connected to both the first ladder rail and a lower support brace, wherein the lower support brace is pivotably connected to an upper support brace that is pivotably connected to the first ladder rail, a second base rail pivotably connected to both the second ladder rail and a lower support brace, wherein the lower support brace is pivotably connected to an upper support brace that is pivotably connected to the second ladder rail.
COLLAPSIBLE LADDER
GREEN JEFFREY A (author)
2015-12-10
Patent
Electronic Resource
English
IPC:
E06C
LADDERS
,
Leitern