Work chair having a vertically adjustable chair support
US4641885A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1984 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Jun 27, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03255
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The work chair is provided with a one-piece chair shell (8), in the rear region of which an integrally incorporated hinge portion (11) is formed between the lumbar region and buttocks portion (12) and the backrest portion (11). The seat shell (13) contains a base bearer (14) which forms part of an adjusting mechanism and on which the chair shell (8) is suspended for longitudinal movement by means of spring-loaded pivoting members (27, 32). The base bearer (14) and the backrest portion (10) are connected together with the aid of a control member (36) fastened by guide means (37, 38), in such a manner that a variation of the inclination of the backrest portion (10) caused by an adjusting force brings about a simultaneous variation of the inclination of the seat shell (13) in the same direction. Through the elimination of the adjusting force, the backrest portion is returned to its normal position or position of rest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.