Flow regulation vent
AssigneeResMed Limited
InventorsMuditha Pradeep Dantanarayana, Saad Nasr
Life of this patent
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Abstract
A flow regulation vent for use in controlling a vent flow of washout gas in a system for supplying breathable gas pressurized to within a therapeutic pressure range above atmospheric pressure to a patient in the treatment of a sleep disordered breathing condition is disclosed. The flow regulation vent may include a housing having at least one vent orifice and at least one fixed bleed orifice; and a flap configured to regulate the vent flow of washout gas through the at least one vent orifice, wherein the at least one fixed bleed orifice is not covered by the flap in any position and the flow regulation vent provides a minimum vent flow independent of the position of the flap.
Claims30
A flow regulation vent for use in controlling a vent flow of washout gas to atmosphere in a system for supplying breathable gas pressurized to within a therapeutic pressure range above atmospheric pressure to a patient in the treatment of a sleep disordered breathing condition, the flow regulation vent comprising:
- a housing having at least one vent orifice and at least one fixed bleed orifice;
- and
- a flap configured to regulate the vent flow of washout gas to atmosphere through the at least one vent orifice,
- wherein the at least one fixed bleed orifice is not covered by the flap in any position and the flow regulation vent provides a minimum vent flow to atmosphere independent of the position of the flap, and
- wherein the at least one vent orifice and the at least one fixed bleed orifice are structured such that the vent flow through the at least one vent orifice and the at least one fixed bleed orifice has a substantially constant flow rate when the breathable gas is pressurized to any pressure within the therapeutic pressure range.
A flow regulation vent for use in controlling a vent flow of washout gas to atmosphere in a system for supplying breathable gas pressurized to within a therapeutic pressure range above atmospheric pressure to a patient in the treatment of a sleep disordered breathing condition, the flow regulation vent comprising:
- a fixed portion having at least one vent orifice and at least one fixed bleed orifice;
- and
- a movable portion positioned adjacent to the fixed portion and configured to be moved by pressure of the breathable gas to regulate the vent flow of washout gas through the at least one vent orifice such that in any position the movable portion does not cover the at least one fixed bleed orifice to provide a minimum vent flow to atmosphere independent of the position of the movable portion, and
- wherein the at least one vent orifice and the at least one fixed bleed orifice are structured such that the vent flow through the at least one vent orifice and the at least one fixed bleed orifice has a substantially constant flow rate when the breathable gas is pressurized to any pressure within the therapeutic pressure range.
Dependencies are inferred from the claim text.