Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 12, 2008
Patent Application Number
10383713
Date Filed
March 7, 2003
Patent Citations Received
Patent Primary Examiner
Patent abstract
A respiratory protection circuit of the type having an air flow regulator disposed in an air flow path between an air supply and a respirator is improved by including an air flow splitter and a bi-directional valve. The air flow splitter is disposed in the air flow path upstream from the air flow regulator, the splitter dividing the air flow path into first and second downstream flow paths, with the first downstream flow path leading to the respirator. The bi-directional valve is disposed in the second downstream flow path wherein the bi-directional valve prevents excessive downstream air flow therethrough and prevents upstream air flow therethrough.
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