The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2015
Filed:
Dec. 06, 2011
Jin-ho Lee, Seoul, KR;
Jungchul Moon, Seoul, KR;
Kangsoo Park, Osan-Si, KR;
Dong-sun Noh, Bucheon-Si, KR;
Jin-Ho Lee, Seoul, KR;
Jungchul Moon, Seoul, KR;
Kangsoo Park, Osan-Si, KR;
Dong-Sun Noh, Bucheon-Si, KR;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A filtering face maskthat has a harnessand a mask body. The mask bodyincludes a filtering structureand a cup-shaped shaping layerwhere the latter comprises a closed cell foam layer that has a plurality of fluid permeable openingslocated in it. The openingsare surrounded by recessed regions. The filtering structuredoes not make substantial contact with the shaping layerat the recessed regions. The shaping layermakes contact with the wearer's face at the mask body perimeterwhen the respirator is being worn. The use of a foam shaping layer that has openings surrounded by recessed regions provides sufficient structural integrity or stiffness to prevent mask body collapse during respirator use while also exhibiting a low pressure drop and rapid fluid distribution of air within the mask to allow for low breathing resistance and extended wearer comfort.