US Patent 8128876 Apparatus for providing pollution free air

An apparatus for providing pollution free air to an individual includes an enclosed or semi-enclosed space or compartment for surround or partially surrounding an individual's head or upper body to separate the individual from polluted air. A filter assembly and fan forcing polluted air through the filter assembly and into the enclosure. The filter assembly includes a first filter for removing relatively large particles such as sand or dust from the polluted air while a second HAPA filter removes airborne allergens before forcing non-polluted air into the enclosed or semi-enclosed space.