Nose filter

Details Nose filter Nose filter

2008-02-21

2011-11-22

Douglas, Steven O (Department: 3771)

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

C128S206180

Reissue Patent

active

RE042941

ABSTRACT:
A filtering apparatus fits adjacent to the nostrils and nose of the user and includes a rigid base for retaining a filtering material thereon through which the user may breathe. The filter material takes the form of an open-cell foam, in the form of a pad, which is removably held between retainer members carried on the rigid base. The foam pad includes a peripheral sidewall and defines an open cavity in the thickness thereof. A clamping device included in the base has an upper and lower plate that are joined together by fasteners. A supporting arrangement for facial wearing comprises a pair of elongated ear support members arranged in spaced-apart relationship and joined together to define a pivot or hinge mechanism that is captured beneath the opposing surfaces of the base plates.

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patent: 5603317 (1997-02-01), Farmer
patent: 6752149 (2004-06-01), Gillespie et al.

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