04947490 is referenced by 60 patents and cites 8 patents.

A football helmet is provided with a releasable face mask which is attached to the helmet by hook-and-pile fastening means. Abutment means prevent relative movement of the face mask in response to a force which impinges on the mask in a direction toward the wearer's face, but permit the mask to break away from the helmet in response to excessive forces in other directions, as when the mask is pulled forward or twisted sideways.

Title
Football helmet with breakaway face mask
Application Number
7/351935
Publication Number
4947490
Application Date
May 15, 1989
Publication Date
August 14, 1990
Inventor
James T Hayden
3154 Exon St., Cincinnati, 45241
OH, US
Agent
Wood Herron & Evans
IPC
A42B 3/20
View Original Source