Automatic foldable ladder
US9447637B2 · kind B2 · utility
1Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Nov 5, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F11/064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A foldable ladder for providing access to an opening including: a first motorized drive mechanism for moving a cover for the opening between a closed position and an open position; a second motorized drive mechanism coupled to a plurality of foldable ladder portions for moving the ladder portions between a folded configuration and an unfolded configuration; such that, in moving the cover between the closed and an open position, the first motorized drive mechanism triggers the second motorized drive mechanism to move the ladder portions between the folded configuration and unfolded configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.