Ultrasonic cleaner

Details Ultrasonic cleaner Ultrasonic cleaner

1989-11-22

1992-04-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, H01L 4108

Patent

active

051091747

ABSTRACT:
An improved ultrasonic cleaner is disclosed. Transducers are attached to a tank to vibrate liquid within the tank. A drive circuit is linked with the transducers to cause the transducers to oscillate at ultrasonic frequencies. The drive circuit includes an oscillator and a counter. The oscillator produces an ultrasonic signal. The counter divides the ultrasonic signal and feeds divided signals back into the oscillator to modulate the amplitude of the ultrasonic signal within a square-wave envelope and to step the frequency of the ultrasonic signal at discrete values about the center frequency.

REFERENCES:
patent: 2489860 (1949-11-01), Carlin
patent: 3371233 (1968-02-01), Cook
patent: 3638087 (1972-01-01), Ratcliff
patent: 4319155 (1982-03-01), Nakai et al.
patent: 4398925 (1983-08-01), Trinh et al.
patent: 4455063 (1984-04-01), Smith
patent: 4501151 (1985-02-01), Christman
patent: 4544477 (1985-11-01), Ratcliff
patent: 4559826 (1985-12-01), Nelson
patent: 4736130 (1988-04-01), Puskas
patent: 4864547 (1989-09-01), Krsna
A Programable Pulse Generator for Piezoelectric Multielement Transducers, Certo et al., Ultrasonics, Jul. 1984 pp. 163-166. (copy in 310/317).

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