Patent No. EP3777938 (titled "Aerosol Generator") was filed by Pari Pharma on Jun 4, 2012. The application was issued on Aug 2, 2023.
An aerosol generator with optimized nozzle portion for efficient nebulization of high-viscosity fluids. The generator features a vibratable membrane with through holes, where each hole has a nozzle portion with a smallest diameter bordered by a larger diameter. The ratio of the total hole length to nozzle length is at least 4, enabling high total output rates and narrow droplet size distributions. The nozzle portion is formed in a two-stage process, with the first stage creating the nozzle portion and the second stage forming the remainder of the hole. This configuration enables rapid nebulization of high-viscosity fluids, particularly useful for medical applications where high concentrations of active compounds are limited.

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