US Patent 9271872 Welding helmet air flow barrier

An air barrier that prevents entrainment of surrounding air from the welding environment into the welding helmet is provided. The barrier for the welding helmet contains a flexible curtain, front and rear edges, and means for securing the front edge of the curtain adjacent to the rear edge of the helmet. The flexible curtain may be made of fire-resistant and flexible molded material. The air barrier may be permanently secured to or removable from the welding helmet. The invention may be used in conjunction with a variety of ventilation and cooling systems, including small units that mount on or in welding helmets, as well as more elaborate blowing systems partially carried by the welder.