Pneumatic cushion and manufacturing method therefor
US4467484A · kind A · utility
47Cited by
4References
29Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 18, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Feb 18, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/192
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A pneumatic cushion fabricated from two sheets of expandable thin material are welded together at a circumferential portion thereof to define therebetween a expandable pneumatic chamber. The welded portion is separated from the pneumatic chamber by a substantially rigid board. The board-like member cooperates with a portion of the sheets mating therewith to isolate the welded portion from tension forces applied to the sheets as the chamber air pressure increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.