Portable escape ladder
US4143741A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1977 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Dec 30, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C9/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A portable escape ladder comprises a bracket for gripping over a building window ledge, a pair of chains suspended from the bracket and supporting a series of spaced transverse rungs therebetween and optional stand-off devices attached at least to some of the rungs to hold the ladder a fixed distance from the building wall. There is provided a form of connection between the rungs and the chains in which the ends of the rungs are pressed flat and formed with an opening in which the junction of a pair of chain links is captively held. The optional stand-off devices comprise substantially flat frames with upright extensions fitting in bores formed in the respective rungs and fastened in place by snap nuts on the ends of the uprights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.