| abstract |
PROBLEM TO BE SOLVED: To provide a gas flow having one or more features useful for the use, function or configuration of the device, or to improve the safety of the device, or at least to a public or medical professional. Provide a device that provides a useful option for the user. A device for delivering a gas flow has a housing having a recess and an outlet port for the gas flow. The recess is defined by at least one substantially continuous, gas permeable and seamless wall 3256, 3262 other than the gas flow path from the recess to the outlet port of the housing. [Selection Diagram] FIG. 151 |