1
Cherie Alexander, Peter David Halstead, Brian Howard: Football helmet having a removable inflatable liner and a method for making the same. Adams USA, David W Nagle Jr, Vance A Smith, Stites & Harbison PLLC, May 8, 2001: US06226801 (83 worldwide citation)

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 ...


2
Cherie Alexander, Peter David Halstead, Brian Howard: Football helmet with inflatable liner. Adams USA, David W Nagle Jr, Vance A Smith, Stites & Harbison PLLC, June 13, 2000: US06073271 (52 worldwide citation)

A protective helmet incorporates an inflatable liner that has front, crown, rear, left and right side portions. To ensure uniform inflation, the inflatable liner is comprised of a plurality of inflatable cells interconnected by a series of air passageways. The liner has a front portion that extends ...


3
Peter David Halstead, Cherie F Alexander: Helmet fitting system. Southern Impact Research Center, Luedeka Neely &Graham PC, January 30, 2001: US06178560 (36 worldwide citation)

A fit system positionable adjacent interior portions of a helmet and cranial surfaces of a cranium of a wearer of the helmet proximate the interior portions of the helmet for improving the fit of the helmet to the cranium. The system includes an elongate fluid impervious bladder having a first end i ...