Clean gas purge for breathing gas regulator

Details Clean gas purge for breathing gas regulator Clean gas purge for breathing gas regulator

2005-11-22

2005-11-22

Mitchell, Teena (Department: 3743)

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

C128S205240, C137S908000

Reexamination Certificate

active

06966316

ABSTRACT:
A self contained breathing apparatus (SCBA) served by a source of breathing gas with a mask and a demand regulator connected to the mask. The regulator has a flexible diaphragmatic member having a side exposed to ambient that moves in response to pressure differentials to cause a valve mechanism to introduce breathing gas to the mask. A passage provides breathing gas over said diaphragm exposed to ambient which can be a passage from one side of the diaphragm to the other. A protective cover can overlie the passage which can be displaced upon gas flow through the passage. The method purges ambient contaminants from the diaphragm by providing breathing gas over the diaphragm through an opening of the diaphragm.

REFERENCES:
patent: 3216416 (1965-11-01), Mitchell
patent: 3716053 (1973-02-01), Almovist et al.
patent: 5357950 (1994-10-01), Wippler
patent: 5464009 (1995-11-01), Tatarek-Gintowt
patent: 5787882 (1998-08-01), Hamilton
patent: 5970977 (1999-10-01), Sattelberg
patent: 6091331 (2000-07-01), Toft
patent: 6651662 (2003-11-01), Prete et al.
patent: 6718976 (2004-04-01), Matsuoka
patent: 6729331 (2004-05-01), Kay
patent: 2004/0149286 (2004-08-01), Haston

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