Chair insert having a contoured back support portion and a seat support portion
US5114209A · kind A · utility
Inventor
Key dates
| Filing date | Mar 21, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Mar 21, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/425
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An insert for a chair includes a seat portion and a back portion, and is molded from dense firm rubber, or the like. The seat portion tapers from a front edge to the rear such that the upper surface is essentially parallel with the floor when the insert is installed on the chair. The back portion includes a lower concave front surface fitting the gluteal region of the pelvis, a central convex portion fitting the lumbar curve, and an upper concave portion matching the thoraic kyphotic curve. The use of the insert maintains the user's spine in a natural postion that places the center of gravity of the head over the vertical axis of the spine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.