Foamed PVC pneumatic ball
US4956234A · kind A · utility
9Cited by
21References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1988 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Jan 26, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1376
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A low-pressure inflatable article, made by rotomolding of polyvinyl chloride materials, featuring a lower weight as compared to similar articles made of the same material as well as improved physical characteristics which permit inflation of the article without the need for any inflation mechanical device, such as inflation with the mouth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.