Patent ID: 11877604
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 0:
1. A maintenance-free respirator, comprising:
(a) a mask harness;
(b) a mask body that includes at least one layer of filter media, the mask body having a perimeter that includes an upper segment that comprises first and second concave segments viewable in a top view plane that is projected onto a top view of the respirator when the respirator is in an open condition, wherein the first and second concave segments are located, respectively, on first and second sides of a central plane when viewing the mask body through the top view plane, wherein the upper segment of the perimeter includes a rounded segment in a nose region of the mask body; and
(c) a nose foam attached to the mask body along the perimeter, wherein the nose foam includes first and second concave segments, wherein the first concave segment is located on the first side of the central plane adjacent the first concave segment of the mask body, and wherein the second concave segment is located on the second side of the central plane adjacent the second concave segment of the mask body.