Filter mask

Details Filter mask Filter mask

2006-05-02

2006-05-02

Bennett, Henry (Department: 3743)

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

C128S205290, C128S206120, C128S206130

Reexamination Certificate

active

07036507

ABSTRACT:
The invention provides a filter mask for filtering air inhaled and exhaled from the mouth and nostrils while providing a positive facial lock at all edges of the mask. The filter mask has upper and lower edges which are provided with malleable stiffeners for conforming to the shape of the wearer's nose and cheek area and the lower jaw and chin area, respectively. The material of the filter mask is folded to have an omega pleat for forming a breathing chamber and a secondary pleat for assisting in securing the mask to the lower jaw and chin area. A pair of headbands are used to hold the mask on the head. The peripheral edges of the mask are bound. The mask provides excellent filtration since the positive facial lock around all edges of the mask substantially prevents air from leaking between the mask and the face.

REFERENCES:
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patent: 3603315 (1971-09-01), Becker, III
patent: 3971369 (1976-07-01), Aspelin et al.
patent: 3985132 (1976-10-01), Boyce et al.
patent: 4300549 (1981-11-01), Parker
patent: 4688566 (1987-08-01), Boyce
patent: 5699791 (1997-12-01), Sukiennik et al.
patent: 5724677 (1998-03-01), Bryant et al.
patent: 6332465 (2001-12-01), Xue et al.
patent: 6336459 (2002-01-01), Miyake et al.
patent: 6484722 (2002-11-01), Bostock et al.

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