Surgery – Liquid medicament atomizer or sprayer – Ultrasonic
Reexamination Certificate
1999-10-13
2001-09-04
Lewis, Aaron J. (Department: 3761)
Surgery
Liquid medicament atomizer or sprayer
Ultrasonic
C128S200180
Reexamination Certificate
active
06283118
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a nebulizer for medical use, and more particularly to an ultrasonic nebulizer which uses a conical guide tube to concentrate oscillating energy from a transducer, enabling a liquid medicine to be efficiently nebulized.
A patient, who suffers from asthma or a chronic bronchial disease, may have to take an inhalation therapy, for example, to take a bronchiectatic spray when getting a trouble in breathing. Various nebulizers have been disclosed for nebulizing liquid medicine, enabling nebulized medicine to be easily inhaled by the patient. Conventional nebulizers commonly use a miniature compressor and piston means to nebulize liquid medicine. However, these nebulizers produce high noise when operated. Recently, various handy ultrasonic nebulizers have been developed. An ultrasonic nebulizer uses an electronic transducer circuit to produce ultrasonic waves for nebulizing liquid medicine. The transducer of the electronic transducer circuit is driven by a transistor, which requires a big volume of electric current to operate. During the operation of the transistor, much heat is produced. If the temperature of the transistor surpasses a certain level, the transistor may be burnt out.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide an ultrasonic nebulizer, which is compact and handy. It is another object of the present invention to provide an ultrasonic nebulizer, which uses ultrasonic waves to nebulize a solution into a spray without causing much noise. It is still another object of the present invention to provide an ultrasonic nebulizer, which is detachable, and convenient for a routine maintenance work. It is still another object of the present invention to provide an ultrasonic nebulizer, which uses a reservoir and a guide tube to concentrate ultrasonic waves, enabling the liquid medicine to be efficiently nebulized. It is still another object of the present invention to provide an ultrasonic nebulizer, which is equipped with a mouthpiece for easy inhalation of nebulized medicine.
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Dougherty & Troxell
Lewis Aaron J.
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