Pressure controlled exhaust vent
AssigneeFisher & Paykel Healthcare Limited
InventorsBrett John Huddart, Andrew Paul Maxwell Salmon, Matthew James Pedersen, Hamish Joshua Rose, Fadi Karim Moh'd Mashal, Thomas Mark Richardson, Simon Mittermeier, Max Leon Betteridge
Life of this patent
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Abstract
A patient interface includes a mask body, an elbow, a connector and a conduit. Any one or more of the mask body, the elbow, the connector and the conduit includes a bias flow vent. The bias flow vent is configured to deform with the application of pressure but not fully collapse such that an orifice size defined by the bias flow vent can vary with the application of pressure.
Claims25
A patient interface assembly for use with positive pressure respiratory therapy, the patient interface assembly comprising:
- an intake conduit to deliver pressurized gas to an interior of a patient interface of the patient interface assembly;
- and
- an exhaust conduit to allow a passage of gas from the interior of the patient interface to an exterior of the patient interface,
- wherein the exhaust conduit comprises at least one valve, the at least one valve comprising a base and a membrane, the membrane having a first end defining an inlet opening, the base having a second end defining an outlet opening, the first end of the membrane having at least one concave portion and at least one convex portion and the first end of the membrane being configured to collapse inwardly to vary a flow path size in response to changes in pressure acting on the membrane.
Dependencies are inferred from the claim text.