Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David V. Haston0
Date of Patent
February 19, 2008
0Patent Application Number
103547710
Date Filed
January 30, 2003
0Patent Primary Examiner
Patent 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 pressure differentials to cause a valve mechanism to introduce breathing gas to the mask. An expanding and contracting member and a chamber fluidically connected to the diaphragm compensates for movement of the diaphragm while shielding the diaphragm from ambient contaminants.
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