FILTER FACE RESPIRATORY MASK WITH SHAPE-GENERATING FOAMING LAYER Russian patent published in 2013 - IPC A62B7/10 

FIELD: medicine.

SUBSTANCE: invention refers to filter face respiratory masks. The mask comprises a mask support 12 and a lashing straps system 14. The mask support 12 has a structure providing its tight fit on the face without the need to use auxiliary components, such as face seal, a foaming nose element or a nose clamp. The mask support 12 comprises a filter element 18 and a shape-generating cup-shaped layer 20 with the latter containing a closed-cell foaming layer wherein there is a number of gas-permeable openings. The filter layer is provided above the shape-generating layer and extended along the full area of the shape-generating layer. The shape-generating layer 20 contacts the user's face along the perimetre 19 of the mask base once the respirator is in use.

EFFECT: use of the foaming shape-generating layer in a combination with a filter element extended along the full surface of the shape-generating layer provides an adequate structural integrity (rigidity) of the mask and prevents mask support crushing when the respirator is in use, as well as provides low pressure drop that in turn gives low respiration resistance and better comfort of use.

14 cl, 5 ex, 1 tbl, 3 dwg