Abstract: A nebulizer has an aerosol generator, a reservoir, and an aerosol outlet. A piezoelectric vibration generator is on a downstream side of a support washer, and power to the piezo is provided by a spring contact assembly. The assembly has upstanding electrical terminals for contact with electrical supply conductors. There are spring terminals extending around a rim of the spring contact assembly to engage an exposed underside of the washer, and a resilient ridge extending in the upstream direction to engage the underside of the piezo, which itself is on the downstream side of the washer.

Abstract: A nebulizer has an aerosol generator mounted in a housing, and has a vibratable aperture plate mounted to an annular support and to which is attached a vibration generator piezo. A downstream annular resilient seal is mounted between the housing and the washer on a side of the aperture plate opposed to the liquid supply reservoir. An upstream resilient seal is in the form of a gasket and is mounted between the washer and the housing reservoir, and has an opening forming part of a throat over the aperture plate. The gasket has a washer-shaped body extending radially from a downstream-extending rim adjacent the aperture plate. There are two upwardly-directed ridges for engagement with a housing surface, and the gasket is configured so that when under axial compression the opening internal surface is tapered inwardly in a flow direction to form a funnel shape.