US Patent No: 8,277,462
Number of patents in Portfolio can not be more than 2000
Phacoemulsification device and method for operating the same
Stats
-
Oct 2, 2012
Issued date -
Sep 10, 2008
filing date -
12/677,690
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
The invention relates to a phacoemulsification device, comprising: —a hand piece having a cutting tip for emulsifying a lens, wherein the tool holder is provided with piezoelectric elements for deflecting the cutting tip, —a regulator, the input of which is electrically connected to the tool holder, for receiving an actual value that is proportional to the voltage induced on the piezoelectric elements of the tool holder that is constantly oscillating on the natural frequency thereof, said regulator being suitable for comparing the actual value with a predetermined target value, thus determining an actuating variable, —a power amplifier, the input of which is connected to the regulator in order to receive the actuating variable, and the output of which is connected to the tool holder, wherein the tool holder may be actuated simultaneously with the receipt of the actual value and a power output to the tool holder being able to occur, such that a direct feedback coupling may be attained, thus enabling the tool holder to constantly oscillate at the natural frequency thereof with a deflection of the cutting tip corresponding to the actuating variable.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 6,997,935 Resonant converter tuning for maintaining substantially constant phaco handpiece power under increased load | 2 | 2001 | |
|
|
|||
| 5,331,951 Phacoemulsification probe drive circuit | 34 | 1992 | |
|
|
|||
| 6,203,516 Phacoemulsification device and method for using dual loop frequency and power control | 42 | 1997 | |
|
|
|||
| 5,394,047 Ultrasonic transducer control system | 11 | 1993 | |
|
|
|||
| 4,271,371 Driving system for an ultrasonic piezoelectric transducer | 29 | 1979 | |
|
|
|||
| 6,259,207 Waveguide series resonant cavity for enhancing efficiency and bandwidth in a klystron | 3 | 1998 | |
|
|
|||
| 5,728,130 Ultrasonic trocar system | 47 | 1997 | |
|
|
|||
| 6,175,180 Method for optimizing the drive of a piezoelectric actuator, in particular for phacoemulsifier devices, by dynamic detection of its eletromechanical characteristics and devices based thereupon | 33 | 1999 | |
|
|
|||
| 6,027,515 Pulsed ultrasonic device and method | 41 | 1999 | |
|
|
|||
| 5,180,363 Operation device | 137 | 1991 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Apr 2, 2016 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 2, 2020 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 2, 2024 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |