Filtering face-piece respirator having nose cushioning member

Patent metadata

Field	Value
Publication number	US-9770057-B2
Application number	US-201314013347-A
Country	US
Kind code	B2
Filing date	Aug 29, 2013
Priority date	Aug 29, 2013
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A filtering face-piece respirator 10 that includes a harness 14 and a mask body 12 that has a multi-layer filtering structure 16 . The respirator includes a cushioning member 64 positioned proximate the nose area of the mask body 12 , enveloped by a layer of the filtering structure 16 . The cushioning member 64 is a compressible material and may be elastic. The cushioning member 64 can be positioned directly opposite of a nose clip 56.

First claim

What is claimed is:

1. A filtering face-piece respirator that comprises:
a harness; and
a mask body having an interior surface and comprising:
a filtering structure that comprises an outer cover web, a filtering layer, and an inner cover web that defines at least a portion of the interior surface;
a nose clip; and
a cushioning member positioned within the filtering structure between the outer cover web and the inner cover web, wherein the cushioning member is located between the nose clip and the inner cover web, and further wherein the cushioning member comprises a thickness at a relaxed state of at least 1 mm; wherein the filtering layer is located between the nose clip and the cushioning member.

2. The filtering face piece respirator of claim 1 , wherein the nose clip and the cushioning member are located between the outer cover web and the inner cover web.

3. The filtering face piece respirator of claim 1 , wherein the cushioning member comprises a foam.

4. The filtering face piece respirator of claim 1 , wherein the cushioning member comprises a foam having a sheath therearound.

5. The filtering face-piece respirator of claim 1 , wherein the cushioning member has a thickness of at least 2 mm.

6. The filtering face-piece respirator of claim 1 , wherein the cushioning member is elastic.

7. The filtering face-piece respirator of claim 1 , wherein the cushioning member has a thickness at a compressed state, the thickness at the compressed state being less than 90% of the thickness at the relaxed state.

8. The filtering face-piece respirator of claim 7 , wherein thickness at the compressed state is at least 50% or less of the thickness at the relaxed state.

9. The filtering face-piece respirator of claim 1 , wherein the mask body has a first side and a second opposite side, and the cushioning member extends from the first side to the second side.

Assignees

• 3M Innovative Properties Co

Inventors

• Duffy Dean R

Classifications

• A41D13/11

  Protective face masks, e.g. for surgical use, or for use in foul atmospheres (eye-masks A61F9/04 {; hoods affording protection against heat or harmful chemical agents A62B17/04}) · CPC title

• A62B23/025

  the filter having substantially the shape of a mask (surgical face masks A41D13/11) · CPC title

• A62B7/10 Primary

  with filter elements · CPC title

• A41D13/1161

  Means for fastening to the user's head · CPC title

• A62B18/025

  Halfmasks (A62B23/02 takes precedence; surgical face masks A41D13/11) · CPC title