Ultrasonic vibrator and a method of controllingly driving same
AssigneeTaga Electric Co., Ltd.
InventorShoji Mishiro
Life of this patent
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Abstract
An ultrasonic vibrator comprises torsional electrostrictive transducers for torsional vibration, longitudinal electrostrictive transducers for longitudinal vibration, and two metallic members firmly, coaxially and integrally holding the torsional electrostrictive transducers and the longitudinal electrostrictive transducers therebetween. An altered section is formed in one of the metallic members in such a shape that makes the torsional resonant frequency and the longitudinal resonant frequency coincide with each other. A voltage or an electric current having a controlled amplitude and/or a controlled relative phase is applied to the electrostrictive transducers to generate composite vibrations of various modes.
Claims7
An ultrasonic vibrator comprising:
- at least one torsional electrostrictive transducer for torsional vibration;
- at least one longitudinal electrostrictive transducer for longitudinal vibration having substantially the same shape and size as said at least one torsional transducer;
- and
- a pair of metallic members firmly, coaxially and integrally holding said at least one torsional electrostrictive transducer and said at least one longitudinal electrostrictive transducer therebetween;
- one of said metallic members having an altered section formed in such a shape whereby the torsional resonant frequency and the longitudinal resonant frequency of said vibrator coincide with each other.
Dependencies are inferred from the claim text.