Hollow article of variable wall structure density
US9038672B2 · kind B2 · utility
1Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Dec 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1376
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molded thermoplastic article including a hollow body is provided, the article comprising a first layer, and a foamed second layer, the first layer and foamed second layer defining a wall structure, the foamed second layer having a lighter density relative to the first layer. In the wall structure, the ratio of the first layer to foamed second layer varies along the length of the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.