Ergonomic chair
US4270797A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Oct 12, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03283
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The ergonomic chair comprises at the upper end of the chair column, a supporting arm on which the front end of the seat supporting frame is articulated for pivoting vertically. At the rear end of the seat supporting frame, a back rest is connected to the seat supporting frame and the supporting arm by means of a movement guiding and return mechanism so that an alteration in the inclination of the back rest automatically causes a proportional alteration in the inclination of the seat supporting frame. The movement guiding and return mechanism is divided into two structural units which are separate in construction. The one is a linkage mechanism which is effective between a back-rest connection construction, the seat supporting frame and the supporting arm, with a movement lock which is effective when the chair is in the position of rest. The other structural unit is constructed in the form of a spring mechanism which can be locked and which applies a force to the chair column between the back-rest connection construction and the supporting arm, through which the back rest and the seat supporting frame are restored from a backwardly inclined position into a normal initial position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.