Patent ID: 7762256

Claim:
A protective device comprising: a mask part having a front that is spaced from a wearer's face during use of the protective device and an edge portion that bears against a wearer's face during use of the protective device, and a side that extends from said edge portion to said front, said side and front defining an inner space that receives air for breathing; a wall portion inside said mask part and that is attached to said edge portion and overlaps said side to define an interspace between said wall portion and an overlapped part of said side, said wall portion extending a first distance from said edge portion to a free edge that extends completely around an inside of said side of said mask part spaced from said front so that said interspace is open toward said inner space at said free edge; and air supply means for directing received air through said interspace into said inner space during operation of the protective device, said air supply means opening only into said interspace and being in said side entirely in a part of said side between said edge portion and a second distance from said edge portion that is less than said first distance.