Personal emergency breathing system with locator for supplied ai

Details Personal emergency breathing system with locator for supplied ai Personal emergency breathing system with locator for supplied ai

1998-01-06

1999-12-07

Lewis, Aaron J.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

12820527, 12820523, 12820516, 12820427, 12820418, A62B 700

Patent

active

059965800

ABSTRACT:
An air filtration unit is carried within a closed canister whereby upon removal of the cover, ambient air may be filtered through the filtration unit and supplied to a user. In one form, the canister is applied to a fitting of a fireman's gas mask or hose portion of the fireman's supplied air respiratory system such that in the event of system failure or exhaustion of the supplied air, the supplied air system can be disconnected and the canister applied to the gas mask or air hose fitting. A locator in the form of an apertured nose cone is projected under spring bias from the canister body to guide the canister into securement with the face mask or hose fitting. The filtration unit is also provided in the canister with shock-resistant mountings. In another form, the canister is provided with a mouthpiece, a plenum having inhalation and exhalation valves, and a hood. By removing the cover, the individual may don the hood and inhale filtered ambient air through the mouthpiece with exhaled air flowing into the hood and about an escape path defined between the hood and the user's neck.

REFERENCES:
patent: 3486730 (1969-12-01), Potash
patent: 3651974 (1972-03-01), Barry et al.
patent: 4997217 (1991-03-01), Kunze
patent: 5186165 (1993-02-01), Swann
patent: 5271390 (1993-12-01), Gray et al.
patent: 5394867 (1995-03-01), Swann
patent: 5524616 (1996-06-01), Smith et al.
patent: 5562092 (1996-10-01), George
patent: 5640952 (1997-06-01), Swann et al.

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