Boarding ladder apparatus for mobile equipment
US7686133B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2005 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Apr 22, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R3/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An mobile equipment boarding ladder includes a pair of hinged mounting brackets attached to the mobile equipment at a first end. A ladder step is attached to the second ends of the hinged brackets via a pair of pivot mechanisms. The hinge pins and the pivot mechanisms are substantially parallel so that the entire ladder can fold and collapse against the side of the mobile equipment in response to an external force, such as an obstacle. The hinged brackets can be self-centering via gravity, a spring, or both. A pair of flexible straps are attached to the second end of the hinged brackets, and hang vertically from the brackets. A pair of lower pivot mechanisms and a lower step are attached to the lower end of the straps, oriented in the same manner as the first pivot mechanisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.