Breathing apparatus for providing a source of breathable air in

Details Breathing apparatus for providing a source of breathable air in Breathing apparatus for providing a source of breathable air in

1991-09-30

1992-11-17

Burr, Edgar S.

Surgery

Respiratory method or device

12820124, 12820125, 12820525, A62B 1802, A62B 1704, A62B 2302, A61M 1500

Patent

active

051634228

ABSTRACT:
A breathing apparatus for providing a source of breathable air in a burning structure for the firefighters or occupants trapped in the burning structure includes a hollow body member connected to a hollow piercing means for penetrating a wall of the structure. The piercing means provides orifices for receiving breathable air from an interior cavity of the wall. The breathing apparatus can be equipped with a one-way valve for permitting the transfer of air from the wall cavity to the user but prohibiting the back flow of smoke or other contaminated air through the apparatus to the clean air disposed in the wall cavity. The apparatus can also be equipped with a locking thread for securely engaging the apparatus with the pierced wall and providing sealing engagement of an annular sealing ring with the wall.

REFERENCES:
patent: 807597 (1905-12-01), Carpenter
patent: 1040311 (1912-10-01), Halloran
patent: 4320756 (1982-03-01), Holmes
patent: 4331139 (1982-05-01), Popa
patent: 4373522 (1983-02-01), Zien
patent: 4467796 (1984-08-01), Beagley
patent: 4608975 (1986-09-01), Tannatta
patent: 4640278 (1987-02-01), Barry
patent: 4774939 (1988-10-01), Disney
patent: 4901715 (1990-02-01), Mulcahy
patent: 4905684 (1990-03-01), Heffer
patent: 4974584 (1990-12-01), Goodnoe

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