Breathing mask with flow indicator for the respiration air

Details Breathing mask with flow indicator for the respiration air Breathing mask with flow indicator for the respiration air

1992-12-29

1994-06-21

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820525, 12820222, A62B 700, A62B 900, G08B 300, A61M 1600

Patent

active

053220595

ABSTRACT:
A breathing mask with a fan for feeding respiration air into the interior space of the mask has a flow indicator for indicating a necessary respiration air flow at the air outlet end of the fan connection. In order for this indicator to be directly recognizable by the mask user in his field of vision, the opening of the air outlet end (4) shall be closed at least partially by a flow plate, which is movably mounted on a guide structure (11, 20) such that it emerges into the field of vision of the mask user in the presence of air flow, and guides the respiration air flow along the inner side of the window (10). If the respiration air flow is insufficient, the flap jumps back, and warning windows appear, instead, in the range of vision of the mask user.

REFERENCES:
patent: 440713 (1890-11-01), Krohne et al.
patent: 4098271 (1978-07-01), Maddock
patent: 4832015 (1989-05-01), Nowacki et al.
patent: 4905683 (1990-03-01), Cronjaeger
patent: 5035239 (1991-07-01), Edwards

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