Gas mask for normal pressure operation and overpressure...

Details Gas mask for normal pressure operation and overpressure... Gas mask for normal pressure operation and overpressure...

2005-08-02

2009-08-18

DeMille, Danton (Department: 3771)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S205240, C128S207120, C137S860000

Reexamination Certificate

active

07575004

ABSTRACT:
A gas mask for normal pressure operation and overpressure operation allows changeover of the expiration valve (4) from normal pressure operation to overpressure operation is made possible in a simple manner. The pretension of the valve spring (7) of the expiration valve (4) is adjusted by an angle lever (10) pivotable about an axis of rotation (13).

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patent: 196 11 556 (1997-05-01), None
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