Breathing mask with fixed mask body

Details Breathing mask with fixed mask body Breathing mask with fixed mask body

1993-11-24

1995-10-03

Burr, Edgar S.

Surgery

Respiratory method or device

Face mask covering a breathing passage

12820621, A62B 1808

Patent

active

054543690

ABSTRACT:
A breathing mask with a fixed, curved mask body and with a mask edge extending around the mask body and adapted to the shape of the face for attaching a sealing edge sealing the mask body against the face and with a supply opening located in the mouth area of the mask body. The mask body provides low-distortion vision along with the largest possible useful field of vision. To accomplish this task, the curvature in azimuthal section planes (5, 6, 7) of the mask body (1) is designed to decrease continuously in the corresponding section plane toward the mask edge (2), starting from a meridian symmetry axis (4) of the mask body; that the azimuthal curvature on the meridian symmetry axis (4) also decreases monotonically, starting from the mouth area (8); and that the meridian curvature of the mask body 1 along the symmetry axis (4) is essentially uniform.

REFERENCES:
patent: 596919 (1898-01-01), Steves
patent: 1096761 (1914-05-01), Scheer
patent: 1127122 (1915-09-01), Furtaw
patent: 1362766 (1920-12-01), McGargill
patent: 1975797 (1934-10-01), Montuori
patent: 2036850 (1936-04-01), Bullard
patent: 3181531 (1965-05-01), Angioletti
patent: 4296746 (1981-10-01), Mason, Jr. et al.
patent: 4657010 (1987-04-01), Wright
patent: 4764990 (1988-08-01), Markert
patent: 4881538 (1989-11-01), Angell

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