Tilt tension mechanism for chair
US7500718B2 · kind B2 · utility
91Cited by
33References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Oct 17, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03266
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A tilt tension mechanism for a chair comprises a gear drive mechanism for driving a torsion bar having a drive shaft, a face gear and an actuator shaft with a pinion gear section. The pinion gear section and face gear have cooperating spiral threads which provide for multi-teeth engagement. An isolator bearing is disposed adjacent to the engagement section between said pinion gear teeth and said face gear teeth to support vertical tooth loads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.