Adjustment mechanism, back cover and arm rest for a chair
US6557939B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Jun 19, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03283
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The adjustment mechanism contains a pneumatic spring that is placed vertically in the underframe, for adjusting height, and a pneumatic spring that is linked to the seat support at one end and the back-rest at the other, for synchronized adjustment of the angle. The pivotable back-rest and the fixed seat support are coupled with each other on the main rotational axis in two hinge connections. The main rotational axis runs above and crosswise over the seat plate. The seat plate has guide cranks on its underside, the supporting arms of the seat support engaging is said guide cranks in such a way that they can slide crosswise to the main rotational axis. The front bearing pegs of the supporting arms engage in the guide cranks. The seat plate is coupled together with the inclination spring on the moving rotational axis on the back-rest. The invention also relates to a back cover with a variably positionable lumbar reinforcement insert and height-adjustable armrests. The inventive adjustment mechanism offers efficient and comfortable synchronization between the sequences of movement of the back-rest and the seat plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.