TODAY’S PATENT – ULTRASONIC TOOTHBRUSH
The ULTRASONIC TOOTHBRUSH was invented by Arthur Kuris (New York, NY) on the 8th of June 1982 , bearing patent number US4333197A.
The present invention relates to an apparatus for oral hygiene care, and more particularly, to an apparatus for personal dental care employing ultrasonic energy suitable for regular use in the home.
One of the important objective of the present invention is to provide a novel and improved ultrasonic tooth brush which is relatively inexpensive to manufacture and offers a maximum of safety to the individual using it. The ultrasonic tooth brush is reliable and efficient enough for personal dental hygiene. The following invention provides a circuit arrangement to drive an ultrasonic transducer while protecting the user thereof from either mechanical or electrical hazards. An ultrasonic toothbrush for use in personal dental hygiene care includes an elongated handle member in the form of a hollow housing having disposed therein a low voltage coil and cooperating ferrite core which is driven at ultrasonic frequencies.