Gas mask having a protective hood

Details Gas mask having a protective hood Gas mask having a protective hood

1986-11-17

1988-09-20

Coven, Edward M.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820227, 12820617, A62B 710

Patent

active

047717718

ABSTRACT:
Gas masks each with a protective hood according to the invention are used as rescue equipment, e.g. escape equipment. For this purpose, they must be available when needed in a fail-safe condition and then untrained persons must be able to apply and use them. The gas mask has in its protective hood portion a breathing attachment in form of a half mask. On the outside, the breathing attachment supports a plug-in frame which is open at opposite sides or ends and accommodates a breathing filter inserted therein through one of the open ends or sides. Respiration takes place through the inlet walls of the frame and the filter. The used-up breathing filter is replaced by inserting a replacement filter. The simple insertion or replacement of the breathing filter makes training of untrained persons possible by using training filters.

REFERENCES:
patent: 2534720 (1950-12-01), Loose
patent: 2591953 (1952-04-01), MacLean
patent: 3152588 (1964-10-01), Rogowski
patent: 4212846 (1980-07-01), Wise
patent: 4430995 (1984-02-01), Hilton
patent: 4467795 (1984-08-01), Eckstein
patent: 4473072 (1984-09-01), Walther
patent: 4501272 (1985-02-01), Shigematsu

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