Ergonomically improved tripod stepladder
US6874598B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 15, 2003 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Oct 22, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C1/39
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An inventive stepladder of tripod structure with an actuating mechanism that extends the rear legs and front step assembly in a coordinated manner to assume the tripod footprint. The actuating mechanism may include a vertical center post; a sliding collar journaled on the center post to coordinate the extension and retraction of the rear legs and step assembly; an A-brace for extending and retracting the step assembly and further serving as an auxiliary work platform for the uppermost step in the step assembly; leg braces for extending and retracting the rear legs, and a stop block attached to the lower end of the center post. A locking pin may be provided to secure the position of the sliding collar along the center post. The stop block may function to relieve shear stress on the locking pin and to provide support for a user's weight on the A-brace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.