Helmet with reinforcement
US5075904A · kind A · utility
31Cited by
10References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 1, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Aug 1, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2437/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved helmet comprising a fiber reinforced thermosetting resin as a main component is disclosed. In the helmet, at least a part thereof to be subjected to shock adsorption property test defined by JIS T 8133 (1982) is reinforced with a cloth of polyethylene fiber having high tenacity and high modulus such as that having tensile strength of not less than 20 g/denier and tensile modulus of not less than 500 g/denier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.