Pressure relief in a respiratory assistance system
First Claim
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1. A method of controlling fluid pressure through a pressure relief device, the method comprising:
- connecting the pressure relief device to a respiratory assistance system, the pressure relief device comprising a housing having a vent, a first tube, and a second tube fluidly coupled within the housing, the vent defining a passage from within the housing to an ambient environment;
retaining a valve within the housing to obstruct the vent, the valve being retained between the vent, the first tube, and the second tube; and
resiliently deforming said valve, in response to a predetermined pressure in the respiratory assistance system, to (i) fluidly couple the vent, the first tube, and the second tube, and (ii) contact a sound dampener to dampen a sound generated by said valve when said valve resiliently deforms.
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Abstract
A pressure relief device comprising a valve configured to resiliently deform in response to a predetermined pressure; and a sound dampener configured to dampen a sound generated by the valve when the valve resiliently deforms in response to the predetermined pressure.
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Citations
20 Claims
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1. A method of controlling fluid pressure through a pressure relief device, the method comprising:
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connecting the pressure relief device to a respiratory assistance system, the pressure relief device comprising a housing having a vent, a first tube, and a second tube fluidly coupled within the housing, the vent defining a passage from within the housing to an ambient environment; retaining a valve within the housing to obstruct the vent, the valve being retained between the vent, the first tube, and the second tube; and resiliently deforming said valve, in response to a predetermined pressure in the respiratory assistance system, to (i) fluidly couple the vent, the first tube, and the second tube, and (ii) contact a sound dampener to dampen a sound generated by said valve when said valve resiliently deforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling fluid pressure in a variable-flow continuous positive airway pressure (CPAP) system, the method comprising:
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connecting a pressure relief device between a flow driver and a CPAP generator, the pressure relief device comprising a housing having a vent, a first tube, and a second tube fluidly coupled within the housing, the vent defining a passage from within the housing to an ambient environment; retaining a valve within the housing to obstruct the vent, the valve being retained between the vent, the first tube, and the second tube; and resiliently deforming said valve, in response to a predetermined pressure in the variable-flow CPAP system, to (i) fluidly couple the vent, the first tube, and the second tube, and (ii) contact a sound dampener to dampen a sound generated by said valve when said valve resiliently deforms. - View Dependent Claims (17, 18, 19, 20)
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Specification