Chair seat
US6523900B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Sep 1, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/60
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A chair seat that is movable between an upright and a forward position includes a spring mechanism that biases the seat toward the upright position. The spring mechanism includes camming structures that utilize both compressional and torsional forces from the spring to bias the seat toward the upright position. The compression of the spring exerts a positive force that must be overcome before the seat can be moved out of its upright position. The chair seat is constructed from a number of discrete components that are secured together without the use of welding or separate fasteners, such as via snap-fits. The discrete components include positioning tabs, special shapes, and other features that prevent them from being improperly assembled. The components of the chair seat may all be constructed out of suitable durable plastics, such as polypropylene, polyethylene, polycarbonate, and glass filled thermoplastics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.