PROTECTIVE HELMET

摘要

A protective helmet includes an outer shell and a controlled air dissipation (CAD) assembly installed within the outer shell. The CAD assembly includes an inner shell liner releaseably mounted to the outer shell, a primary bellows unit disposed between an outer surface of the inner shell liner and the inside surface of the outer shell, and a secondary bellows unit disposed between an inner surface of the inner shell liner and the head of a person wearing the protective helmet.

主权项

1. In a protective helmet adapted to be worn on the head of a person and having a rigid outer shell defining an interior chamber, a controlled air dissipation (CAD) assembly configured to be installed within the interior chamber of the outer shell, the CAD assembly comprising:
a liner having at least two air transfer holes; a primary bellows unit mounted to an outer surface of said liner and extending toward an inner surface of the outer shell, said primary bellows unit including a primary base section mounted to said outer surface of said liner, at least two first stage pad sections extending from said primary base section with each defining a primary bellows chamber therein, and a first stage bridge section interconnecting adjacent first stage pad sections to define a primary air channel configured to facilitate air transfer between adjacent primary bellows chambers; and a secondary bellows unit mounted to an inner surface of said liner and extending toward the head of the person wearing the protective helmet, said secondary bellows unit including a secondary base section mounted to said inner surface of said liner, at least two second stage pad sections extending from said secondary base section with each defining a secondary bellows chamber therein, and a second stage bridge section interconnecting adjacent second stage pad sections to define a secondary air channel configured to facilitate air transfer between adjacent secondary bellows chambers; wherein a first one of said air transfer holes in said liner is arranged to facilitate air transfer between a first pair of said primary and secondary bellows chambers, wherein a second one of said air transfer holes in said liner is arranged to facilitate air transfer between a second pair of said primary and secondary bellows chambers, and wherein at least one of said first and second stage pad sections associated with each of said first and second pairs of said primary and secondary bellows chambers includes an air charge hole to permit communication with ambient air.