Patents Assigned to Undatim Ultrasonics S.A.
  • Method for controlling the working frequency of an electro-acoustic vibrating device
    Patent number: 4882525
    Abstract: One periodically determines the frequency of the vibrating element for which the absorbed power through the ultrasonic device is at a minimum and for which its efficiency is maximum. One compares this frequency to a previously measured frequency and modifies of one step of a given amplitude the working frequency of the ultrasonic device after a given number of comparisons having for result a frequency difference greater than a pre-established value have been detected.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: November 21, 1989
    Assignee: Undatim Ultrasonics S.A.
    Inventors: Eric Cordemans De Meulenaer, Baudoin Hannecart