Breathing regulator with nonlinear positive pressure spring
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United States of America Patent
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Dec 8, 2009
Grant Date -
Dec 30, 2004
app pub date -
Apr 26, 2004
filing date -
Apr 25, 2003
priority date (Note) -
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Abstract
A breathing regulator having a non-linear positive pressure spring is provided for use in an air supplied respirator. The regulator includes a housing formed from a regulator body and a cover sub-assembly, a diaphragm assembly, and the non-linear spring. The spring holds the diaphragm assembly closed and resists the force applied by air pressure during exhalation by the user, but collapses once a sufficient amount of force has been applied, thereby permitting the user to exhale freely.
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