Ladder leveler
US5273133A · kind A · utility
23Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C7/44
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ladder leveler attachment formed of two preassembled leg assemblies, each having protruding bolts for direct and easy attachment to the ladder side rails, and a drive rod slidably engaging both assemblies. Each assembly has an elongated housing and an elongated, slidably interfitting base plate, the two components forming pockets for retaining protruding attachment bolts. Inside each housing is a gear, and a gear rack having closed ends forming gear stops. Swivel feet are detachably secured to hoop feet, being shiftable from a lowered, generally horizontal position to a vertical, edge-engaging position alongside the leg housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.