Individually fitted helmet liner and method of making same
US4412358A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | May 27, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S2/909
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An individually fitted helmet liner includes a plurality of layers, each of which consists of a thermoplastic sheet formed with an array of pockets receiving the major portions of energy-absorbing spheres, the spheres of one layer being in register with the spaces between the spheres of an adjacent layer. The liner is fitted to an individual wearer's head by heating the sheets to a plastic state, placing the liner between an outer shell and the wearer's head, and applying tension to the layers around their periphery to deform the sheets to a degree determined by the relative position of the spheres. A mold member for use in making the individual resin-sphere layers and a method employing the mold member to make such layers are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.