Vent valve assembly
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United States of America Patent
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May 10, 2005
Grant Date -
Jul 10, 2003
app pub date -
Feb 13, 2003
filing date -
Oct 16, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vent valve apparatus for use with a system for supplying breathable gas pressurized above atmospheric pressure to a human or animal includes a gas washout vent, a vent valve adapted to progressively restrict the flow area of the washout vent, and a pressure sensitive vent valve controller. The controller is adapted to progressively cause the vent valve to restrict the flow area of the gas washout vent in response to increases in the pressure of the gas supply. Thereby, the vent valve substantially regulates the flow of gas through the washout vent over a range of gas supply pressures.
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Family
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