Ultrasonic cleaner
US5109174A · kind A · utility
26Cited by
11References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1989 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Nov 22, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B2201/71
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.