Respiratory mask with an air-impermeable shield

Details Respiratory mask with an air-impermeable shield Respiratory mask with an air-impermeable shield

2007-03-20

2007-03-20

Yu, Justine R. (Department: 3771)

Surgery

Respiratory method or device

Gas stream directed away from face mask to penetrate...

C128S206170, C128S205270

Reexamination Certificate

active

10761527

ABSTRACT:
A respiratory mask includes a shield and a mask body. The shield includes an air-impermeable bent sheet that defines a rim-receiving recess. The mask body is detachably connected to the shield and includes a rim that is received in the rim-receiving recess and that defines a chamber therein. The shield cooperates with the mask body to define a gap therebetween. The rim is formed with at least an aperture that is in spatial communication with the chamber and the gap. A filter sheet is permeable to air and is attached to the rim to cover the aperture.

REFERENCES:
patent: 4501272 (1985-02-01), Shigematsu et al.
patent: 4630604 (1986-12-01), Montesi
patent: 6817362 (2004-11-01), Gelinas et al.

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