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:
Apr. 11, 2017
Filed:
Aug. 29, 2013
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventor:
Dean R. Duffy, Woodbury, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A41D 13/11 (2006.01); A62B 23/02 (2006.01);
U.S. Cl.
CPC ...
A41D 13/1115 (2013.01); A41D 13/1161 (2013.01); A62B 23/025 (2013.01); Y10T 29/49604 (2015.01);
Abstract
A filtering face-piece respiratorhaving a mask bodyformed of a filtering structure. The mask bodyhas at least one transversely extending stiffening member, formed by an s-shaped or tri-fold pleat permanently connected, such as by welding. The at least one stiffening memberincreases the integrity of the mask body, when in the opened cup-shaped configuration, inhibiting collapse of the mask body, due to, for example, increased pressure drop across the mask bodydue to dirty or moisture laden air.