Chair
US5964503A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Aug 22, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C1/03266
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A chair having concurrently operative function between a seat and a backrest is disclosed which has a simple structure and is capable of exhibiting smooth motion and which has enhanced degree of freedom in its design because of the simple structure. The chair comprises a shallow box-like base member 2 mounted on an upper portion of a support pillar 1 and forward protruding below a front half of a seat; link members 3, 4 back-and-forth swingably provided on right and left front ends of the base member 2, the link members 3, 4 extending upward; and a swing member 6 having its front ends pivotally attached to the base member 2 at an intermediate position of the base member 2 in front of the support pillar 1 by means of a horizontal shaft 7 in the presence of a torsion coil spring 8, the swing member 6 having a portion 6k, 6j extending substantially right upward at its rear end, to the substantially upright portion 6k, 6j being attached a backrest, the swing member being provided with seat supporting portions 6f, 6g behind the intermediate pivotal point so as to support a seat frame 11 by the link members 3, 4 and the seat supporting portions 6f, 6g. In the chair, the seat supporting p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.