US 12,357,849 B2
Personal respiratory protection device
Garry J. Walker, Stockton-on-Tees (GB)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Filed on Jan. 12, 2022, as Appl. No. 17/573,684.
Application 17/573,684 is a continuation of application No. 14/912,191, granted, now 11,241,595, previously published as PCT/US2014/050853, filed on Aug. 13, 2014.
Claims priority of application No. 1314886 (GB), filed on Aug. 20, 2013.
Prior Publication US 2022/0134139 A1, May 5, 2022
Int. Cl. A62B 18/02 (2006.01); A62B 18/08 (2006.01); A62B 23/02 (2006.01)
CPC A62B 18/02 (2013.01) [A62B 18/082 (2013.01); A62B 18/084 (2013.01); A62B 23/025 (2013.01)] 6 Claims
OG exemplary drawing
 
1. Personal respiratory protection device for use by a wearer, comprising:
a respirator body having a periphery, a filter media, forming at least part of the respirator body, and a gasket, the gasket being located at the periphery and extending along at least a portion of its length, where in the gasket forms a central aperture,
wherein the gasket is formed of a flexible elastomeric material and is contoured, the contour comprising a ridge and a flexion point disposed on the ridge and formed from a local reduction in thickness of the flexible elastomeric material, wherein the ridge that projects away from the periphery and the central aperture along an entire length of the ridge and the gasket is adapted to flex about the flexion point, wherein at least a portion of the ridge is angled towards the periphery, and further wherein the ridge is adapted to deform against the face of the wearer and towards the periphery.