Circuit for driving an ultrasonic dental tool at its resonant fr

Details Circuit for driving an ultrasonic dental tool at its resonant fr Circuit for driving an ultrasonic dental tool at its resonant fr

1979-08-13

1983-09-06

Dobeck, B.

Electricity: motive power systems

Impact, mechanical shock, or vibration-producing motors

318129, 318130, 318132, H02K 3300

Patent

active

044031769

ABSTRACT:
Circuitry is disclosed for driving the transducer assembly of a dental handpiece at its resonant frequency. The circuitry includes a variable frequency oscillator and a peak-detecting processor which allows the oscillator to sweep through a continuum of frequencies until maximum current in the transducer driving coil is sensed.

REFERENCES:
patent: 2995689 (1961-08-01), Scarpa
patent: 3539888 (1970-11-01), Prisco et al.
patent: 3673475 (1972-06-01), Britton, Jr.
patent: 3787715 (1974-01-01), Eaton, Jr.
patent: 4056761 (1977-11-01), Jacoby
patent: 4069444 (1978-01-01), Heim
patent: 4101816 (1978-07-01), Shepter

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