Protective helmet
US6453476B1 · kind B1 · utility
110Cited by
60References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2101/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A protective helmet is provided which preferably has a hard outer shell and an energy-absorbing liner. The liner is made of low resilience or slow-recovery viscoelastic foam which is compression rate sensitive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.