06226801 is referenced by 83 patents and cites 11 patents.

The invention pertains to protective helmet that has an inflatable liner that is constructed with a multiplicity of cells each separated by constrictions of a narrower cross-section. The liner has a central ring and a plurality of loops extending therefrom adapted to protect various portions of the wearer's skull. The structure of the liner permits the liner to be molded using various molding techniques.

Title
Football helmet having a removable inflatable liner and a method for making the same
Application Number
9/450492
Publication Number
6226801 (B1)
Application Date
November 29, 1999
Publication Date
May 8, 2001
Inventor
Brian Howard
Cookeville
TN, US
Peter David Halstead
Knox
TN, US
Cherie Alexander
Knox
TN, US
Agent
Stites & Harbison PLLC
US
Agent
Vance A Smith
US
David W Nagle Jr
US
Assignee
Adams USA
TN, US
IPC
A42B 3/10
View Original Source