Machine for leveling a ladder on an uneven surface
US6401866B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/44
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A machine for leveling a ladder on a uneven surface, with a support housing attached to one or both ladder legs, having an interior cavity for a telescoping leg, two inner drilled lugs that support a release and lock lever, two outer drilled lugs that overlap the ladder legs for more secure mounting, both support housings mount to each ladder leg in such a way that the load sits directly over the machine with out increasing the width of the ladder. A release and lock lever attached to the support housing, that automatically locks into a telescoping leg by spring action when released making it unnecessary for locking pins or bolts, a release and lock lever, rotating on a rotation shaft, with a positive gear tooth lock that engage into the telescoping leg, a telescoping leg with a large number of machined or molded gear teeth that telescopes out of the interior cavity of the support housing, a release and lock lever that rotates on a shaft and wedges into the telescoping leg according to the weight applied to the ladder, a spring fixed between release and lock lever and support housing to hold the mechanism in the lock position until actuated, a rotation shaft fix between two support…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.