Filtering mask

Surgery – Respiratory method or device – Means for removing substance from respiratory gas

Reexamination Certificate

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Details

C128S207180, C055S484000, C055SDIG035

Reexamination Certificate

active

06966318

ABSTRACT:
A filtering mask includes two filtering bodies with a tube connected therebetween. Two sub-tubes on the tube are inserted in the wearer's nostrils. Each filtering body includes two chambers separated by a separation plate through which through holes are defined. One of the chambers is connected to the tube by a sealing pad which can be opened in one direction, and the other chamber includes a filtering member for filtering air coming from outside. The through holes are controlled by a sealing pad, which can be opened when inhaling and closed when exhaling.

REFERENCES:
patent: 443191 (1890-12-01), Illing
patent: 533854 (1895-02-01), Loeb
patent: 706015 (1902-08-01), Breen
patent: 1221246 (1917-04-01), Travers
patent: 1691648 (1928-11-01), Drager
patent: 4200092 (1980-04-01), Warncke et al.
patent: 6684882 (2004-02-01), Morine

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