Breathing apparatus mouthpiece

Details Breathing apparatus mouthpiece Breathing apparatus mouthpiece

1992-03-23

1994-11-29

Burr, Edgar S.

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820426, 12820524, A62B 1810

Patent

active

053680189

ABSTRACT:
A breathing apparatus mouthpiece which is reversibly switchable between an open circuit and a closed circuit system by rotating a special valve in the mouthpiece. The breathing apparatus mouthpiece is compact, lightweight, easy to operate and has low breathing resistance.

REFERENCES:
patent: 3575167 (1971-04-01), Michielsen
patent: 4273120 (1981-06-01), Oswell
patent: 4446859 (1984-05-01), Pedersen
patent: 4683881 (1987-08-01), Hansen et al.
patent: 5127398 (1992-07-01), Stone

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