Ladders and related methods
US9422767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2014 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Feb 13, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49716
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Ladders and related methods of using and manufacturing stepladders are provided. In one embodiment, a stepladder is provided that comprises a first assembly hingedly coupled with a second assembly. The first assembly has a pair of spaced apart rails pivotally coupled with one or more rungs. The second assembly includes a pair of space apart rails with one or more bracing members extending therebetween. The first assembly and second assembly are configured to be displaced relative one another such that the stepladder is selectively positionable between a first, deployed state and a second, collapsed state. Upon rotation of the two assemblies relative to one another into a stowed condition, components of the second assembly engage undersurfaces of the rungs effecting rotation of at least a portion of each rung relative to the rails of the first assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.