Form-fitting, energy-absorbing material and method for making the same
US5056162A · kind A · utility
91Cited by
15References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jun 7, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249955
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A helmet system includes a helmet shell and an energy-absorbing helmet liner that is constructed from an open-cell urethane foam impregnated with a room-temperature curable thermoset epoxy. The impregnated foam liner is inserted in the helmet shell, heated until the liner becomes deformably plastic, and placed on the head of a user, permitting custom-fitting of the helmet system that conforms to the contours of the user's head. When cured by cooling, the liner assumes a rigid construction that, by custom-fitting, repeatably aligns the helmet shell to the head of the user, and is crushable to absorb energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.