Mechanism for an office chair
US8146990B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Feb 5, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C31/126
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A mechanism for an office chair having a backrest support which may be pivoted rearwardly. Adjustment of the backrest pivotal motion is accomplished by the mechanism having a base support which may be positioned on a chair column, a seat support, the backrest support which may be pivoted to the rear, and a pre-tensioned spring arrangement for enabling the mechanism to counter or oppose the movement of the backrest support. The seat support and the base support form a movable unit, which may be moved relative to the chair column depending on the weight of a user applying a load to the seat support. Movement of the movable unit causes an adjustment of the pre-tension of the spring arrangement and/or an adjustment of the spring constant of the spring arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.