Resonant converter tuning for maintaining substantial constant phaco handpiece power under increased load
US7871420B2 · kind B2 · utility
4Cited by
33References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2005 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Oct 24, 2029 |
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 voltage and current supplied to the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.