Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1996-12-18
1998-09-15
Noland, Thomas P.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
604 22, 606169, A61B 1700, B06B 106
Patent
active
058083960
ABSTRACT:
A system and method for tuning and controlling ultrasonic handpieces by incorporating a broad-spectrum signal as at least a component of the signal used to drive the handpiece. The response of the handpiece to this broad-spectrum signal is measured and the frequency or amplitude or both of the drive signal are adjusted in order to maintain the desired level of handpiece performance. The operation of the systems and the performance of the methods described enables the handpiece to be operated in a most effective manner over a more widely varying range of mechanical load and thermal conditions than was possible through the use of prior control systems and methods.
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Patent Abstracts of Europe "Circuit Arrangement for a Magnetostrictive Ultrasonic Oscillator" DE 03136028A1 Mar. 31, 1983.
Alcon Laboratories Inc.
Noland Thomas P.
Schira Jeffrey S.
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