Patent ID: 6183426
Filing Date: 2001-02-06
Classification: A61B,A61H,A61N

Abstract:
An ultrasonic wave applying apparatus comprising:a hand-held applicator device having a vibration element for contacting a skin of a user to apply ultrasonic waves to the skin;a power source providing a DC voltage;an oscillator circuit which is energized by the DC voltage from said power source to generate an oscillating output for driving said vibration element;a load detecting circuit which monitors whether said vibration element is loaded such as by contact with the skin and provides a load detection signal when said vibration element is so loaded;a motion detecting circuit which monitors whether said vibration element is moving and provides a motion detection signal when said vibration element is so moving;a control circuit which is connected to said load detecting circuit and said motion detecting circuit for controlling said oscillation circuit to lower said oscillating output being fed to said vibration element when said load detection signal is not received within a predetermined first time period or when said motion detection signal is not continuous over a critical time duration within a predetermined second time period even in the presence of said load detection signal being detected within said first time period.