Gas mask with a ring-shaped sealing element and breathing filter with a ring-shaped sealing element

A breathing filter and sealing ring, comprising:

• a breathing filter with an annular seal engagement recess;
• and
• a ring-shaped sealing element peripherally sealing the breathing filter, said ring-shaped sealing element having a cross section limited axially by two parallel flat peripheral surfaces and having a concave radial inner limiting surface and having a radial outer limiting surface that first extends axially concavely from the outside to the inside and passes over in a middle area into an elevation tapering outwardly in the radial direction, said elevation for engaging said annular seal engagement recess.

A filter seal comprising:

• a ring-shaped sealing element for peripherally sealing the filter, said ring-shaped sealing element having a cross section limited axially by two parallel flat peripheral surfaces and having a concave radial inner limiting surface and having a radial outer limiting surface that first extends axially concavely from the outside to the inside and passes over in a middle area into an elevation tapering outwardly in the radial direction.