Pressure regulation mechanism for inflatable in-ear device

A pressure regulating mechanism for regulating a pressure of a settable compound being injected into an inflatable in-ear device, said in-ear device including a core member of generally similar form to the contour of the ear canal of an individual, a sound bore being defined within and through the core member from a region exterior to the ear canal to a relatively inner region within the ear canal, a platform to which the core member is attached exteriorly of the ear canal, an inflatable open-ended sheath having a closed end secured to the relatively inner region of the core member, the sheath assuming a first condition and being foldable into an inflatable condition in close adjacency to the core member prior to inflation, the core member and the platform having communicating injection channels for injecting a settable compound into a space defined between the core member and the sheath in its inflatable condition, said pressure regulating mechanism comprising a main body connecting to an outflow channel communicating with the space, said main body allowing discharge of any excess settable compound while maintaining the pressure of the settable compound at a predetermined pressure level below a comfort-limit pressure level acceptable inside the ear canal of the individual during inflation of the sheath from the inflatable condition up to and at an inflated condition with the sheath substantially assuming an inside contour of the ear canal.