Closed cell foam ground pad and methods for making same
US4980936A · kind A · utility
42Cited by
4References
68Claims
0Family size
Inventors
Key dates
| Filing date | Sep 3, 1987 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Sep 3, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/146
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A flexible pad is disclosed for supporting a load above an underlying surface. The pad is thermoformed from closed cell material comprising a plurality of closed cells. A substantial portion of the cells are elongated in a direction generally parallel to ribs and velleys formed in the upper and lower surface and lower surfaces of the pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.