Protective helmets

摘要

Embodiments of a protective helmet have a cushioning outer multilayer structure with at least two cushioning layers of materials having different densities and different geometric layouts, a multilayer hard inner structure attached to the interior surface of the cushioning multilayer structure, and an innermost cushioning structure attached to the inner surface of the multilayer hard inner structure. The multilayer hard inner structure is formed from at least two spaced layers of hard material and a layer of cushioning material therebetween. The innermost cushioning structure may be a multilayer structure similar to the outer multilayer structure with at least two cushioning layers of materials having different densities and different geometric layouts. The innermost cushioning structure may include sensors, optionally in a separate layer, and a thermal-control layer. A flexible thin cover extending around an outer surface of said shell and with or without graphics may be provided.

主权项

1. A protective helmet comprising:
a cushioning outer multilayer structure comprising two cushioning layers of materials having different densities and different geometric layouts, said cushioning outer multilayer structure having a concave interior surface and a convex exterior surface; a multilayer hard inner structure having a concave interior surface and a convex exterior surface, said concave exterior surface of said hard inner structure attached to said concave interior surface of said cushioning multilayer structure, said multilayer hard inner structure including at least two spaced layers of hard material and a layer of cushioning material therebetween, said hard material being harder than said materials of said two cushioning layers of said outer multilayer structure and being harder than said material of said cushioning material of said multilayer hard inner structure; and an innermost cushioning structure attached to said concave inner surface of said multilayer hard inner structure.