Flexible ladder for use on moving conveyances
US5064023A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C5/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A flexible ladder for use on moving conveyances which provides frontal stability but lateral flexibility, the ladder having a first, a second and a third strut member each formed of flexible material and each supported in a generally vertical plane, the strut members being parallel to each other with the second strut member between the first and third strut members. A first set of steps are secured between the first and second strut members and a second set of steps are secured between the second and third strut members the steps being vertically spaced apart from each other and the upper ends of each of the strut members being affixed to a moving conveyance, the ladder providing for ascent of an operator to the operating position on the conveyance but permitting lateral flexiblity if the ladder engages an obstruction on the surface on which the machine moves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.