Telescoping ladder with a cascading collapse mechanism
US10995547B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2017 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Oct 20, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/083
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A telescoping ladder is provided, that includes a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion between a fully-extended position and a collapsed position. The columns are connected to rungs by way of connector assemblies. Each connector assembly has a locking pin moveable between an extended position or a retracted position for extending into or retracting out of openings of adjacent columns to selectively lock or release the columns respectively. The telescoping ladder includes a plurality of actuators that permit collapsing the ladder in a sequential manner, the sequence involving collapsing the columns on a lower portion of the ladder prior to collapsing columns immediately thereabove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.