Inhalation mask

Details Inhalation mask Inhalation mask

1996-04-30

1997-07-08

Millin, Vincent

Surgery

Respiratory method or device

Including body or head supported means covering user's scalp

12820311, 12820524, 12820612, 12820712, A62B 1810

Patent

active

056450478

ABSTRACT:
A valve device (D) of the type used for a breathing apparatus (A) includes a mask section (10) that is adapted for mating with a desired subject (U), such as about a mouth and nose. An inlet tube (12) communicates a desired fluid, such as oxygen, into an interior chamber (16) of the mask (10). At least one plate assembly (18) has a thin, pliable outer section (20) to act as a flapper. A plate mount (22) retains the plate assembly (18), and has at least one pair of passages (24a and 24b) formed therethrough for communicating the fluid (14) out of the interior chamber (16) and an external fluid into the interior chamber (16) of the mask (10). Compatible portions (26a and 26b) of the pliable outer section (20) movably cover the passages (24a and 24b) in the plate mount (22) forming at least one inlet valve (28) that permits the flow of the external fluid into the interior chamber (16) and a second outlet valve (30) that permits the exhaust of combined fluid out of the interior chamber (16).

REFERENCES:
patent: 2936779 (1960-05-01), Kindred
patent: 4974586 (1990-12-01), Wandel et al.

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