Patent ID: 11865267
Assignee: RESMED PTY LTD
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A  F

Claim 14:
15. A system for automated control of gas washout of a patient interface of a respiratory treatment apparatus, the system comprising:
a vent assembly having a variable exhaust area, wherein the vent assembly is associated with the patient interface and configured to vent expiratory gas, wherein the vent assembly comprises a radial exhaust revolver and a conduit casing, wherein the radial exhaust revolver comprises a plurality of apertures, wherein the apertures are adapted to permit gas flow through the radial exhaust revolver within the conduit casing, and wherein inside edges of the apertures comprise a convex surface; and
an actuator configured to manipulate an orientation of the radial exhaust revolver to vary the exhaust area.