Respiratory mask assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 14, 2012
Grant Date -
Jul 30, 2009
app pub date -
Apr 7, 2009
filing date -
Feb 9, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A flow regulation vent for venting washout gas to atmosphere and for regulating flow from a pressurized gas supply includes a fixed portion adapted to engage a gas supply conduit; a spring force biased movable portion in communication with the pressurized gas supply; and a hinge pivotally connecting the movable portion to the fixed portion. The fixed portion has a gas flow orifice and the movable portion is pivotally movable between 1) a relaxed position, below a specified operating pressure to establish a first gas washout flow area, and 2) a fully pressurized position. At or above the specified operating pressure, the pressurized gas pivots the movable portion adjacent the fixed portion to cover at least a portion of the gas flow orifice and establish a second gas washout flow area. The second gas washout flow area is less than the first gas washout flow area.
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