Flexible and foldable marine ladder
US5848667A · kind A · utility
Inventor
Key dates
| Filing date | Feb 11, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Feb 11, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B27/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A folding ladder includes a vertical supporting strap formed from fabric material. The supporting strap has top and bottom ends. The top end of the strap has means, e.g., a fastener, rope or opening, for securing it to a fixed object for holding the ladder upright. At least one loop formed from strap material is provided below the top of the strap and is held in place by the supporting strap. The strap loop depends from the supporting strap and has two upper portions that are connected to each other at the top of the loop. The connected upper portions of the loop lie in lapped face-to-face relationship. Each such loop includes a downwardly depending, generally U-shaped intermediate bend between the connected portions. The U-shaped bend defines a step or hand grip with an opening above it to facilitate the entry of a hand or foot. In a preferred form of the invention, the strap material of each loop is provided with one or more half-twists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.