Patents by Inventor Pravin V. Mehta

Pravin V. Mehta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Resonant converter tuning for maintaining substantial constant phaco handpiece power under increased load
    Patent number: 7871420
    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.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: January 18, 2011
    Assignee: Abbott Medical Optics Inc.
    Inventors: David L. Anderson, Nate G. Elsen, Michael W. Fellinger, Pravin V. Mehta
  • Resonant converter tuning for maintaining substantially constant phaco handpiece power under increased load
    Patent number: 6997935
    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.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: February 14, 2006
    Assignee: Advanced Medical Optics, Inc.
    Inventors: David L. Anderson, Nate G. Elsen, Michael W. Fellinger, Pravin V. Mehta
  • Resonant converter tuning for maintaining substantially constant phaco handpiece power under increased load
    Publication number: 20030097083
    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.
    Type: Application
    Filed: November 20, 2001
    Publication date: May 22, 2003
    Inventors: David L. Anderson, Nate G. Elsen, Michael W. Fellinger, Pravin V. Mehta
  • Ultrasonic handpiece with multiple piezoelectric elements and heat dissipator
    Patent number: 5843109
    Abstract: Handpiece apparatus is provided for disruption and removal of tissue, tumors, bone, cartilage, calculi or the like which includes an arrangement of piezoelectric crystals and a heat sink in order to control crystal temperature despite interruption of cooling irrigation flow through the handpiece.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: December 1, 1998
    Assignee: Allergan
    Inventors: Pravin V. Mehta, George Bromfield