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:
Feb. 02, 2021
Filed:
Jul. 15, 2014
3m Innovative Properties Company, St. Paul, MN (US);
Philip G. Martin, Forest Lake, MN (US);
Caroline M. Ylitalo, Stillwater, MN (US);
Gina M. Buccellato, Eagan, MN (US);
James M. Jonza, Woodbury, MN (US);
William Ward Merrill, Mahtomedi, MN (US);
Douglas S. Dunn, Maplewood, MN (US);
David T. Yust, Woodbury, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
Various embodiments of a respirator () that includes a harness (), a mask body (), and an exhalation valve () are disclosed. The exhalation valve () can include a valve seat () and a flexible flap () that is in engagement with the valve seat. The flexible flap can have one or more materials that can cause the flap to flash () when moving from a closed position to an open position or vice versa. The flashing valve can make it easier for a user to ascertain whether the valve is operating properly.