Convertible ladder
US6857503B2 · kind B2 · utility
18Cited by
45References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjustable hinge mechanism is moveable between an engaged position and a disengaged position. The static hinge mechanism enables the first and second ladder sections to be maintained in a stationary position with respect to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.