Prestressed cylindrical piezoelectric ultrasonic scaler

Details Prestressed cylindrical piezoelectric ultrasonic scaler Prestressed cylindrical piezoelectric ultrasonic scaler

1978-04-06

1979-09-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

32DIG4, 310323, 310325, H01L 4110

Patent

active

041684478

ABSTRACT:
The scaler includes a transducer and an energizing circuit. The transducer includes a tubular piezoelectric transducer element which is maintained in compressive stress when energized by an axial tension bolt adapted to mount a vibratory work tool. The energizing circuit drives the transducer element at its resonant frequency and maintains resonant frequency within an optimum band width, despite changes in capacitive reactance of the transducer element produced by torque applied thereto as the work tool is pressed against an object. A fluid delivery system delivers fluid to the work tool via the tension bolt to effect scaling.

REFERENCES:
patent: 3210580 (1965-10-01), Bodine, Jr.
patent: 3230403 (1966-01-01), Lewis
patent: 3432691 (1969-03-01), Shoh
patent: 3518766 (1970-07-01), Burt
patent: 3651352 (1972-03-01), Puskas
patent: 3809977 (1974-05-01), Balamuth
patent: 3924335 (1975-12-01), Balamuth
patent: 3934526 (1976-01-01), Damast et al.

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