A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
COLLAPSIBLE LADDER A collapsible ladder (1) comprising a single central post (10) having a housing (20) within which an inner rail (30) can slide longitudinally. Rungs (40) are pivotally attached to the 5 inner rail (30). The housing (20) has apertures (28) fitted with rung sliders (29), which govern a trajectory of the rungs (40) by bearing on the rungs (40) as the inner rail (30) slides in the housing (20). This camming action of the inner rail (30) and rungs (20) allows the collapsible ladder (10) to be moved between collapsed and extended configurations in which the rungs (40) are alternatively collapsed towards the post (10) or extend from the post (10). - 60 FIG 1
COLLAPSIBLE LADDER A collapsible ladder (1) comprising a single central post (10) having a housing (20) within which an inner rail (30) can slide longitudinally. Rungs (40) are pivotally attached to the 5 inner rail (30). The housing (20) has apertures (28) fitted with rung sliders (29), which govern a trajectory of the rungs (40) by bearing on the rungs (40) as the inner rail (30) slides in the housing (20). This camming action of the inner rail (30) and rungs (20) allows the collapsible ladder (10) to be moved between collapsed and extended configurations in which the rungs (40) are alternatively collapsed towards the post (10) or extend from the post (10). - 60 FIG 1
Collapsible Ladder
MCGRATH DAVID (author)
2016-08-25
Patent
Electronic Resource
English
IPC:
E06C
LADDERS
,
Leitern