Foldable ladder
US4428458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1981 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | May 28, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A foldable ladder of the type having laterally spaced-apart, substantially vertically oriented front side rails joined by a plurality of steps. A rear support, preferably in the form of laterally spaced-apart, vertically oriented legs, are movable away from the side rails to open the ladder and movable toward the side rails to close the ladder. The side rails and rear legs include hinges intermediate vertical ends thereof for permitting vertical collapsing of the ladder by the folding of the side rails and rear legs about their respective hinges. A storage container, which also doubles as an article support when the ladder is used, also forms a part of the instant invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.