Face mask

Details Face mask Face mask

1974-07-31

1980-04-01

Truluck, Dalton L.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

A62B 700

Patent

active

041956290

ABSTRACT:
The invention disclosed herein relates to face masks which are formed of a polyurethane foam material which is designed to be easily positioned upon the face of the wearer, of light weight without ties but depending upon the formation of certain openings to slip over ears. The mask is furthermore of a free breathing type and without tendency to fog. Additionally, by reason of the construction a filter pad of non-woven rayon fiber may be used to increase the filtration and at the same time not markedly affect audibility in use.

REFERENCES:
patent: 843486 (1907-02-01), Otto
patent: 1292096 (1919-01-01), Schwartz
patent: 2458580 (1949-01-01), Fisketti et al.
patent: 2494406 (1950-01-01), Reitano
patent: 3042034 (1962-07-01), Gruenewaelder
patent: 3101709 (1963-08-01), Gruenewaelder
patent: 3220409 (1965-11-01), Liloia et al.

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