Filter apparatus for welding mask

Details Filter apparatus for welding mask Filter apparatus for welding mask

1978-03-16

1980-06-17

Schroeder, Werner H.

Surgery

Respiratory method or device

Means for removing substance from respiratory gas

2 9, 2 8, A61F 906, A62B 710

Patent

active

042078822

ABSTRACT:
A filter apparatus for a welding mask having airways passage forming structure including a pair of filtered remote inlets and including an intermediate mouthpiece whereby filtered ambient air may be supplied to the mouthpiece. An exhaust structure is communicated at one adjacent point with the mouthpiece and includes a remote outlet. The outlet is provided with a one-way check valve as are each of the inlets and the airways passage forming structure from which the inlets and outlets are supported each comprise U-shaped clips for clampingly engaging an adjacent marginal portion of a welding mask.

REFERENCES:
patent: 652080 (1900-06-01), Chappell
patent: 1975797 (1934-10-01), Montuori
patent: 1978994 (1934-10-01), Fortunato
patent: 2381568 (1945-08-01), Booharin
patent: 2485908 (1949-10-01), Morrow
patent: 3118445 (1964-01-01), Norman
patent: 3649964 (1972-03-01), Schoelz et al.
patent: 3657740 (1972-04-01), Cialone

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