Lightweight helmet shell and method for manufacturing the same
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United States of America Patent
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Jul 31, 2012
Grant Date -
Apr 15, 2010
app pub date -
Oct 15, 2009
filing date -
Oct 15, 2008
priority date (Note) -
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Abstract
A lightweight helmet shell includes an inner shell formed from a porous expanded plastic layer, and an outer shell, in which the outer shell is formed from a compressed fiber sheet having an apparent density of 0.15 to 0.7 g/cc and an impact absorbability of less than 300 G. The lightweight helmet shell has excellent breathability, is lightweight, and has improved impact absorbability.
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