Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1975-09-30
1978-02-14
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310369, H01L 4104
Patent
active
040741524
ABSTRACT:
An ultrasonic wave generator includes an ultrasonic oscillator, an ultrasonic wave transducer connected to the oscillator, a mechanical vibration amplifying member, and an ultrasonic vibratory member. An increased thickness portion, which projects from a portion of the circumferential surface of the ultrasonic vibratory member and from a side wall portion of the mechanical vibration amplifying member at a connecting portion of the ultrasonic vibratory member and the mechanical vibration amplifying member, is integrally formed upon the ultrasonic vibratory member and the mechanical vibration amplifying member whereby the cross-sectional area of the connecting portion between the ultrasonic vibratory member and mechanical vibration amplifying member is gradually changed. With this improvement, the mechanical strength of the connecting portion between the ultrasonic vibratory member and the mechanical vibration amplifying member is increased, the positive transmission of the ultrasonic waves from the mechanical vibration amplifying member to the ultrasonic vibratory member is insured, fatigue failure and cracking of the connecting portion is effectively prevented, and the ultrasonic waves are generated from the ultrasonic vibratory member in a stable manner for a long period of time.
REFERENCES:
patent: 2190666 (1940-02-01), Kallmeyer
patent: 2725219 (1955-11-01), Firth
patent: 3015961 (1962-01-01), Roney
patent: 3140859 (1964-07-01), Scarpa
patent: 3184841 (1965-05-01), Jones et al.
patent: 3214101 (1964-03-01), Perron
patent: 3400892 (1968-09-01), Ensminger
patent: 4034244 (1977-07-01), Asai et al.
Asai Kiyokazu
Takeuchi Akihiro
Budd Mark O.
Kabushiki Kaisha Toyota Chuo Kenkyusho
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