Pressure relief valve

Details Pressure relief valve Pressure relief valve

A - Human Necessities

61

M

A61M 16/20 (2006.01)

Patent

CA 2537675

A pressure relief valve is disclosed that may be used as both an over pressure control valve, preventing possible barotraumas to the patient; or as an overpressure control valve for a breathing circuit preventing over pressures caused by blockages in a breathing circuit (supplying breathing gases to a patient) with the potential to damage either the humidifier or the breathing circuit. The pressure relief valve comprises a magnetic seating that is associated with an outlet vent formed on a breathing assistance apparatus, and a magnetic cover capable of covering the seating and the outlet vent. The cover is held against the seating by a magnetic force between the cover and the seating. The outlet vent is substantially sealed by the cover and when the pressure of the gases in the breathing assistance apparatus exceeds a predetermined pressure value that overcomes the magnetic force, the cover releases from the seating to allow gases to exit the outlet vent and reduce the gases pressure in the breathing assistance apparatus.

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