초록 ▼

An exhaust assembly (1) adapted for use in a respiratory gas delivery system comprises an exhaust vent, an exhaust gas flow passage, a primary gas flow passage, and a moveable member. The exhaust gas flow passage communicated a flow of exhaust gas from a first end of the exhaust assembly to the exha

An exhaust assembly (1) adapted for use in a respiratory gas delivery system comprises an exhaust vent, an exhaust gas flow passage, a primary gas flow passage, and a moveable member. The exhaust gas flow passage communicated a flow of exhaust gas from a first end of the exhaust assembly to the exhaust vent. The exhaust vent communicates the exhaust gas from the exhaust gas flow passage to ambient atmosphere. The primary gas flow passage communicates a flow of supply gas from a second end of the exhaust assembly to the first end of the exhaust assembly. The moveable member defines at least a portion of the exhaust gas flow passage and the primary gas flow passage, is operable to isolate the flow of exhaust gas from the flow of supply gas, and is responsive to a pressure differential between the flow of supply gas and the flow of exhaust gas.

대표청구항 ▼

1. An exhaust assembly adapted for use in a respiratory gas delivery system, comprising: an exhaust gas flow passage structured to carry a flow of exhaust gas received in a first end of the exhaust assembly;an exhaust vent adapted to communicate the flow of exhaust gas from the exhaust gas flow pass

1. An exhaust assembly adapted for use in a respiratory gas delivery system, comprising: an exhaust gas flow passage structured to carry a flow of exhaust gas received in a first end of the exhaust assembly;an exhaust vent adapted to communicate the flow of exhaust gas from the exhaust gas flow passage to ambient atmosphere;a primary gas flow passage structured to communicate a flow of supply gas from a second end of the exhaust assembly to the first end of the exhaust assembly;a moveable member defining at least a portion of the exhaust gas flow passage and at least a portion of the primary gas flow passage; anda base portion having a rigid member and a recess, wherein the movable member is received within the recess and the rigid member is received within a slot provided in a bottom of the movable member such that the rigid member and the movable member in conjunction form a partition that divides an interior of the base portion into the exhaust gas flow passage and the primary gas flow passage, wherein the moveable member includes an aperture and a flexible surface, wherein the aperture forms a part of the exhaust gas flow passage, wherein the movable member is operable to isolate the flow of exhaust gas in the exhaust gas flow passage from the flow of supply gas in the primary gas flow passage, wherein the movable member is responsive to a pressure differential between the flow of supply gas in the primary gas flow passage and the flow of exhaust gas in the exhaust gas flow passage, and wherein responsive to ventilation circuit pressures of 10 to 40 cmH2O within the primary gas flow passage: (i) the exhaust gas flow passage is maintained separate and independent from the primary gas flow passage and shares no common portions with the primary gas flow passage such that any flow of gas within the primary gas flow passage is separated from any flow of gas within the exhaust gas flow passage, and (ii) the exhaust gas flow passage is maintained in an open condition to allow the flow of exhaust gas from the first end of the exhaust assembly to the exhaust vent and out to the ambient atmosphere. 2. The exhaust assembly of claim 1, wherein in response to the pressure differential between the flow of supply gas and the flow of exhaust gas, the moveable member is adapted to regulate a rate at which the flow of exhaust gas is communicated to atmosphere through the exhaust vent. 3. The exhaust assembly of claim 2, wherein the moveable member is adapted to regulate the rate at which the flow of exhaust gas is communicated to atmosphere through the exhaust vent by altering the size of the exhaust gas flow passage. 4. The exhaust assembly of claim 3, wherein the moveable member is adapted to decrease the size of the exhaust gas flow passage in response to an increase in the pressure of the flow of supply gas in the primary gas flow passage relative to the pressure of the flow of exhaust gas in the exhaust gas flow passage. 5. The exhaust assembly of claim 1, wherein the first end of the exhaust assembly is adapted to rotatably couple with a patient interface device. 6. The exhaust assembly of claim 1, wherein the second end of the exhaust assembly is adapted to couple with a flow generating device. 7. The exhaust assembly of claim 1, wherein the exhaust vent is provided in a wall of an exhaust portion that is selectively connectable to the base portion such that the moveable member is retained in between the base portion and the exhaust portion. 8. An elbow assembly for a respiratory mask comprising an elbow, wherein the elbow comprises: (a) an inlet adapted to couple with a flow generating device; and(b) an outlet adapted to couple with a patient interface device, wherein the elbow further defines: (1) a primary gas flow passage adapted to communicate a flow of breathing gas from such flow generator to such patient interface device;(2) an exhaust vent;(3) an exhaust gas flow passage adapted to communicate a flow of exhaust gas from such patient interface device to the exhaust vent, wherein the exhaust vent is adapted to communicate the flow of exhaust gas from the exhaust gas flow passage to atmosphere; and(4) a partition disposed in the elbow and structured to isolate the flow of breathing gas within the primary gas flow passage from the flow of exhaust gas in the exhaust gas flow passage, the partition including a moveable member and a base portion having a rigid member and a recess, wherein the movable member is received within the recess and the rigid member is received within a slot provided in a bottom of the movable member such that the rigid member and the movable member in conjunction form the partition and wherein the partition divides an interior of the base portion into the exhaust gas flow passage and the primary gas flow passage, wherein the moveable member includes an aperture and a flexible surface, wherein the aperture forms a part of the exhaust gas flow passage, wherein the movable member is structured to be responsive to a pressure differential between the flow of breathing gas in the primary gas flow passage and the flow of exhaust gas in the exhaust gas flow passage, wherein responsive to ventilation circuit pressures of 10 to 40 cmH2O within the primary gas flow passage: (i) the exhaust gas flow passage is maintained separate and independent from the primary gas flow passage and shares no common portions with the primary gas flow passage such that any flow of gas within the primary gas flow passage is separated from any flow of gas within the exhaust gas flow passage, and (ii) the exhaust gas flow passage is maintained in an open condition to allow the flow of exhaust gas from outlet to the exhaust vent and out to the atmosphere. 9. The elbow assembly of claim 8, wherein in response to the pressure differential between the flow of breathing gas and the flow of exhaust gas, the moveable member is adapted to regulate a rate at which the flow of exhaust gas is communicated to atmosphere through the exhaust vent. 10. The elbow assembly of claim 9, wherein the moveable member is adapted to regulate the rate at which the flow of exhaust gas is communicated to atmosphere through the exhaust vent by altering the size of the exhaust gas flow passage. 11. The elbow assembly of claim 10, wherein the moveable member is adapted to decrease the size of the exhaust gas flow passage in response to an increase in the pressure of the flow of breathing gas in the primary gas flow passage relative to the pressure of the flow of exhaust gas in the exhaust gas flow passage. 12. The elbow assembly of claim 8, wherein the outlet is adapted to rotatably couple with a patient interface device. 13. The exhaust assembly of claim 1, wherein the moveable member has an at rest position and is structured to move away from the at rest position and into the exhaust gas flow passage and reduce an effective cross-sectional area of the exhaust gas flow passage in response to a pressure within the primary gas flow passage exceeding a pressure within the exhaust gas flow passage. 14. The elbow assembly of claim 8, wherein the moveable member has an at rest position and is structured to move away from the at rest position and into the exhaust gas flow passage and reduce an effective cross-sectional area of the exhaust gas flow passage in response to a pressure within the primary gas flow passage exceeding a pressure within the exhaust gas flow passage. 15. The elbow assembly of claim 8, wherein the exhaust vent is provided in a wall of an exhaust portion that is selectively connectable to the base portion such that the moveable member is retained in between the base portion and the exhaust portion.