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1. (WO2017180214) PROTECTIVE HELMET WITH MULTIPLE PSEUDO-SPHERICAL ENERGY MANAGEMENT LINERS

Pub. No.:    WO/2017/180214    International Application No.:    PCT/US2016/069517
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Dec 31 00:59:59 CET 2016
IPC: A42B 3/00
A42B 3/04
Applicants: BELL SPORTS, INC.
Inventors: BRIGGS, Eamon
Title: PROTECTIVE HELMET WITH MULTIPLE PSEUDO-SPHERICAL ENERGY MANAGEMENT LINERS
Abstract:
A helmet comprising and outer liner and an inner liner slidably coupled to an interior surface of the outer liner is disclosed. The outer liner comprises an interior surface and the inner liner comprises an exterior surface. The inner liner is composed of an elastically deformable material. A majority of the interior surface of the outer liner and a majority of the exterior surface of the inner liner are both substantially parallel to a pseudo-spherical surface having a coronal cross section that is circular with a first radius and a sagittal cross section that is circular with a second radius different from the first radius. The inner liner is elastically deformable along the interior surface of the outer liner in response to rotation of the outer liner relative to the inner liner caused by an impact to the helmet.