Hand held ultrasonic nebulizer

Details Hand held ultrasonic nebulizer Hand held ultrasonic nebulizer

1977-04-04

1978-09-12

Lutter, Frank W.

Gas and liquid contact apparatus

Contact devices

Reciprocating

261 1, 261DIG48, 261DIG65, 128DIG2, 128194, 239102, A61M 1500

Patent

active

041138090

ABSTRACT:
An improved ultrasonic nebulizer for administering a medicament aerosol to a patient. Output from an oscillator is connected through a series inductor to a transducer adjacent a reservoir which generates aerosol from the medicament. The inductor is tuned for series resonance with the bulk capacitance of the transducer. An impedance change in the transducer when liquid is removed or consumed from the reservoir reduces the power delivered to the transducer and prevents transducer damage.

REFERENCES:
patent: 3490697 (1970-01-01), Best, Jr.
patent: 3561444 (1971-02-01), Boucher
patent: 3746000 (1973-07-01), Edwards
patent: 3828773 (1974-08-01), Buch et al.
patent: 3989042 (1976-11-01), Mitsui et al.

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