Edge-shear reduction in body support foam pads
US5048137A · kind A · utility
22Cited by
6References
12Claims
0Family size
Inventor
Key dates
| Filing date | Aug 20, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Aug 20, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/148
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Shear stress on the skin is relieved at cavity edges in a resilient foam pad by cavity walls shaped to define a region of diminished support under the cavity edge. The edge material yields more easily under loading and may roll into the cavity to avoid pressing into body tissues. The interior wall or walls of the cavity are slanted outwardly to undercut all or part of the cavity edge to reduce the thickness of material under the edge. The shape and curvature of the cavity and cavity walls can be adapted and tailored to achieve particular pressure gradients and patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.