Resonant converter tuning for maintaining substantially constant phaco handpiece power under increased load
US6997935B2 · kind B2 · utility
1,040Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2001 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jun 26, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/00745
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting drive signals to the resonant converter which supplies power to the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.