Face mask with back-up smoke inhalation protection and method of

Details Face mask with back-up smoke inhalation protection and method of Face mask with back-up smoke inhalation protection and method of

1996-05-28

1999-10-12

Lewis, Aaron J.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820222, 12820617, 12820523, A62B 710

Patent

active

059642181

ABSTRACT:
A self-contained breathing apparatus for emergency response personnel has face mask with a first port connected by a hose to a tank of compressed air. Back-up smoke inhalation protection is provided for imminent life-threatening situations by configuring a face mask with a canister containing a filter medium, an inlet opening through which air enters and an outlet coupling for attachment to a second port of the face mask. In normal situations the mask is supplied with air from the tank, but should the tank supply become depleted, the canister can be activated. A use-evidencing mechanism is operatively connected to the canister to indicate use of the air filtering system. This mechanism may be a non-reusable cover applied over the inlet opening and/or a valve in the second port of the face mask with a portion that breaks away upon opening of the valve. Such mechanisms provide an indication of previous use of the filtering system and inhibit a fire fighter from using the system in an unauthorized manner, in less than an imminent life-threatening situation.

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