Omni-directional Angular Acceration Reduction for Protective Headgear

Protective headgear includes an outer shell rotatable relative to an inner shell via a thin layer of elastically and/or plastically yielding material disposed between and secured to the inner and outer shells. The yielding material deforms continuously but non-linearly at least in the tangential or shear direction to mitigate angular acceleration of the head during an impact. The yielding material prevents the inner and outer shells from separating or stopping suddenly to avoid imparting a large angular acceleration to the head. In one embodiment, a protective helmet includes an outer shell secured to an inner shell by a yielding material that elastically deforms continuously but non-linearly when subjected to an angular acceleration below a first threshold and plastically deforms when subjected to an angular acceleration above the first threshold.

Attached files:


Patents:
WO 2,010,151,631

Inventor(s): KING ALBERT I [US]; YANG KING HAY [US]; ZHANG LIYING [US]

Type of Offer: Licensing



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