专利名称：Portable industrial air filtration device发明人：Keith A. Grider,Derek J. Leatzow,Stephen J.
McPhilliamy,Antonio J. Belton,John S. White,Jr.,Daniel J. Greene,Ryan L. Francis,Sean J.Corrigan,Charles Steven Pint,Frank E.Garrett, Jr.
申请号：US14200879申请日：20140307公开号：US09776117B2公开日：20171003
专利附图：
摘要：Various embodiments of the present disclosure provide a portable industrial airfiltration device employing an annular dual filter assembly to capture and removeimpurities from the air surrounding the air filtration device, enabling the air filtrationdevice to quickly and efficiently improve the quality and safety of the air. The air filtrationdevice includes a two-piece housing including a lower housing component and a lockingcover removably attachable to the lower housing component. The dual filter assembly ismounted within the housing between the locking cover and the lower housingcomponent, and includes a removable self-supporting outer pre-filter surrounding aseparately removable inner HEPA filter. The pre-filter initially filters the surrounding airby capturing relatively large or coarse impurities, and the HEPA filter further filters theair pulled through the pre-filter by capturing relatively small or fine impurities.
申请人：Illinois Tool Works Inc.
地址：Glenview IL US
国籍：US
代理机构：Neal, Gerber & Eisenberg LLP
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