Mechanism for chair
US6238000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1999 |
| Grant date | May 29, 2001 |
| Priority date | — |
| Expiry date | Feb 3, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03272
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An office chair has a seat (1) mounted on a base (2) so that its inclination can be adjusted with a mechanism (4). The mechanism has a spring (28) mounted in compression between the seat and base, and a manual control (20) acts to adjust the extent of compression of the spring and also the direction of application of the spring force so that a generally linear resistance characteristic can be obtained. The spring (28) preferably has a lower support (12) which engages a positionally adjustable fulcrum (15, 18), and an upper support (11) pivotally connected to the lower support (12). The upper support (11) may be rigidly connected via a rigid bar to a chair back (3). A spring and ratchet arrangement (33, 34) may be provided for locking the seat in position relative to the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.