Control system for a phacoemulsification handpiece
US5938677A · kind A · utility
74Cited by
27References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B2201/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for tuning and controlling ultrasonic handpieces by varying the frequency of the drive signal that is fed to the handpiece by a discrete dither increment. A digital signal processor may be used to measure the response of the handpiece to the varying drive signal and compare these responses to determine the probable value of the actual series resonance. The output of the digital signal processor is used to generate control parameters embodied within an appropriate control signal, which is fed to the source of the drive signal in order to alter aspects of the drive signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.