Patent ID: 7814901

Claim:
A nebulizing device, comprising: a housing including an outlet; a drug reservoir for receiving a drug solution within the housing; an aerosol generator in communication with a first portion of the drug solution; wherein the aerosol generator forms nebulized particles from the portion of the drug solution to enable nebulized particles of the drug solution to be communicated to a user through the outlet; a valve that permits drug solution within the reservoir to replenish a first portion of the drug solution when the first portion is less than a threshold amount, wherein the valve comprises a float that floats on a second portion of drug solution, the float substantially sealing the reservoir when the amount of the first portion of the drug solution is above the threshold amount, the float permitting drug solution to flow from the reservoir towards the aerosol generator when the amount of the first portion of the drug solution is less than the threshold amount.