Protection-hood or helmet-mask for use in environments dangerous to work
OwnerOstoja Kovacevicinventor
Life of this patent
Estimating the term…
Abstract
A protection-hood or helmet-mask having double walls of transparent plastic material, which covers the whole head and by aid of an elastic collar is sealed to the wearer's neck. The space between the walls is divided by a partition wall into two identical halves to which hoses for supply and abduction of air are connected at the lower back of the hood. The air is led to the wearer through an opening in the inner wall at the wearer's mouth and nose. The air can be passed through the hood by overpressure or underpressure arrangements. An air filter is arranged upstream of the air inlet of the hood.
Claims3
A helmet adapted completely to surround the head of the user and having means to seal the helmet to the user's body, the helmet being of double-walled construction comprising a pair of spaced inner and outer walls of stiff material, the inner wall having an opening in front and at least the outer wall being transparent at least where it overlies said opening, partition means extending between the inner and outer walls from the top of the opening of the inner wall rearwardly and downwardly to the bottom of the rear of the helmet, means to supply air to the space between said walls on one side of said partition means, and means to remove air from the space between said walls on the other side of said partition means whereby air passes from said supply means between said walls past said opening and again between said walls to said removing means.
Dependencies are inferred from the claim text.