Patents by Inventor H.ang.kan Dahlberg

H.ang.kan Dahlberg 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).

  • High power ultrasonic transducer
    Patent number: 6137209
    Abstract: A method to improve the high output characteristics of a ultrasonic transducer 1 by urging a cooling gas 13 to flow through the transducer, thereby passing a cooling member 18 between at least one pair of adjacent piezoelectric elements 6, 7. In a preferred embodiment sulfurhexafluoride (SF.sub.6) is used as cooling gas.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: October 24, 2000
    Inventors: Bo Nilsson, H.ang.kan Dahlberg
  • Tubular ultrasonic transducer
    Patent number: 6016023
    Abstract: A method to improve the high output characteristics of an ultrasonic transducer by urging a cooling gas 13 to flow through the transducer, thereby passing a cooling member 3 at the inner radius of at least one piezoelectric element 6 surrounding a central fluid conduit 21. In a preferred embodiment sulfurhexafluoride (SF.sub.6) is used as cooling gas.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: January 18, 2000
    Assignee: Ultra Sonus AB
    Inventors: Bo Nilsson, H.ang.kan Dahlberg
  • High power ultrasonic transducer
    Patent number: 5955823
    Abstract: A method to improve the high output characteristics of a ultrasonic transducer 1 by urging a cooling gas 13 to flow through the transducer, thereby passing a cooling member 18 between each adjacent pair of piezoelectric elements 6, 7. In a preferred embodiment sulfurhexafluoride (SF.sub.6) is used as cooling gas.
    Type: Grant
    Filed: May 12, 1998
    Date of Patent: September 21, 1999
    Assignee: Ultra Sonus AB
    Inventors: Bo Nilsson, H.ang.kan Dahlberg