Three-layer helmet assembly with breathing gas throttle

Details Three-layer helmet assembly with breathing gas throttle Three-layer helmet assembly with breathing gas throttle

1994-01-24

1996-05-14

Asher, Kimberly L.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820124, 12820128, 12820425, 12820524, A62B 1704, A62B 1810, A62B 710, A62B 2302

Patent

active

055158439

ABSTRACT:
A helmet includes a casing engaged in the helmet for accommodating air or pressurized oxygen, a mask secured to the helmet, an inlet pipe connecting the casing to the mask for supplying air into the mask. Fresh air or oxygen accommodated in the casing can be supplied into the mask via the inlet pipe. A bypass is formed in the body and connected to the mask, the exhaled gas in the mask can be sucked out of the mask when air flows through the bypass.

REFERENCES:
patent: 2894508 (1959-07-01), Miles et al.
patent: 3577988 (1971-05-01), Jones
patent: 3620213 (1971-11-01), Savoie, Jr.
patent: 3680555 (1972-08-01), Warncke
patent: 3976063 (1976-08-01), Henneman et al.
patent: 4315335 (1982-02-01), Kennedy, Jr. et al.
patent: 4502480 (1985-03-01), Yamamoto
patent: 4590951 (1986-05-01), O'Connor
patent: 4677976 (1987-07-01), Fujinuma et al.
patent: 5036842 (1991-08-01), Van der Smissen et al.
patent: 5078130 (1992-01-01), Van Oosten et al.

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