Importance

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Abstract

An air delivery system including a means for defining a plenum near the forehead of a wearer, a baffle for distributing the air from the plenum downward over the wearer's mouth, nose, and face, and a means for securing the plenum to the forehead of the wearer, such as a safety helmet, a cap visor, or a pair of safety eye glasses. The brim of the helmet or visor defines the upper portion of the plenum, and a baffle defines the lower portion. The baffle has openings to distribute the air downward over the wearer's face. In the case of the safety glasses, the baffle has an upper portion and a lower portion forming a plenum between them due to a slightly concave shape of the baffle portions. An inlet nozzle is connected to the plenum through the baffle, baffle portions, or the brim, and a small motor and fan assembly is connected to the inlet nozzle via a flexible hose. In operation, the motor draws air through a filter element and distributes the filtered air via the hose to the plenum. The baffle then distributes the air flow over the wearer's breathing zone thereby protecting the wearer from particulate matter or harmful substances in the ambient environment.

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First Claim