Three section extension ladder and method
US11286716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2011 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Nov 5, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An extension ladder including a base section having two side rails with rungs spanning horizontally between them. The extension ladder including an intermediate fly section having two side rails with rungs spanning horizontally between them. The intermediate fly section slidably attached to the base section. The extension ladder including a top fly section having two side rails with rungs spanning horizontally between them, the top fly section sliding attached to the intermediate fly section with the intermediate fly section disposed between the base and the top fly section. The extension ladder including a handle having a first strap portion attached to the base section having a first buckle portion, and a second strap portion attached to the top fly section having a second buckle portion that engages with the first buckle portion when the base section, intermediate fly section and top fly section are in a folded state. A method of moving an extension ladder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.