Protective breathing mask

Details Protective breathing mask Protective breathing mask

1987-09-11

1989-11-28

Hindenburg, Max

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820529, 12820612, 12820619, 12820621, A62B 710

Patent

active

048830526

ABSTRACT:
A multi-layer protective breathing mask adapted to cover the mouth and the nose of a wearer thereof comprises an outer layer, an inner layer and, between the outer and inner layers, a filter element comprising a particle filter and an adsorber filter. The adsorber filter may comprise one or more layers of foam material and the layers of foam material may be of different porosities. The at least one layer of foam material adsorber particles which may preferably be of a plurality of particle sizes.

REFERENCES:
patent: 3971373 (1976-07-01), Braun
patent: 4098270 (1978-07-01), Dolby
patent: 4215682 (1980-08-01), Kubik et al.
patent: 4600002 (1986-07-01), Maryyanek et al.
patent: 4643182 (1987-02-01), Klein

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