Patents by Inventor Kaj Larsson

Kaj Larsson 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).

  • Device for mini-invasive ultrasound treatment of an object by a heat-isolated transducer
    Patent number: 7967764
    Abstract: The present invention relates to a device for mini-invasive ultrasound treatment of an object. At least one therapeutic ultrasound transducer (2) is arranged for treatment of the object (5) by generating an ultrasonic field (3), the temperature focus (F) of which is located in the object (5) for heating thereof. The therapeutic ultrasound transducer (2) comprises a probe (10) adapted to be inserted into the body in the direction towards the object (5) and comprises a front portion (10a) adapted to be located at, against or in the object (5). Said probe (10) comprises at least one transmitter element (11) for generating said ultrasonic field (3). The transmitter element (11) for generating the ultrasonic field (3) is arranged behind the front portion (10a) such that the transmitter element (11) does not heat or substantially not heat the front portion (10a) when in operation.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: June 28, 2011
    Assignee: Ultrazonix DNT AB
    Inventors: Lars Lidgren, Kaj Larsson
  • Ultrasound probe having a central opening
    Publication number: 20060173385
    Abstract: The invention relates to an ultrasound probe having a central opening (22) in an arrangement for ultrasound treatment of a patient. The probe has a front portion adapted to be placed at, against or in an object to be treated and is arranged to emit an ultrasound field having an intensity maximum located in the object for heating thereof. The central opening (22) improves the emitted intensity pattern and enables irrigation of the transmitter.
    Type: Application
    Filed: June 4, 2004
    Publication date: August 3, 2006
    Inventors: Lars Lidgren, Kaj Larsson
  • Device for mini-invasive ultrasound treatment of an object by a heat-isolated transducer
    Publication number: 20050054954
    Abstract: The present invention relates to a device for mini-invasive ultrasound treatment of an object. At least one therapeutic ultrasound transducer (2) is arranged for treatment of the object (5) by generating an ultrasonic field (3), the temperature focus (F) of which is located in the object (5) for heating thereof. The therapeutic ultrasound transducer (2) comprises a probe (10) adapted to be inserted into the body in the direction towards the object (5) and comprises a front portion (10a) adapted to be located at, against or in the object (5). Said probe (10) comprises at least one transmitter element (11) for generating said ultrasonic field (3). The transmitter element (11) for generating the ultrasonic field (3) is arranged behind the front portion (10a) such that the transmitter element (11) does not heat or substantially not heat the front portion (10a) when in operation.
    Type: Application
    Filed: January 15, 2003
    Publication date: March 10, 2005
    Inventors: Lars Lidgren, Kaj Larsson
  • Interferometer compensation for displacement inaccuracies during path length difference altering, method therefor, and fourier transform spectrometer using the same
    Patent number: 5650848
    Abstract: An interferometer includes a beam splitter (BS) and two scanning mirrors (M1, M2), which are parallel and disposed on a common slide member that can be linearly displaced. The interferometer further comprises two compensating mirrors (M3, M4), which are disposed between the beam splitter (BS) and the scanning mirrors (M1, M2). The beam splitter (BS) and each of the compensating mirrors (M3, M4) are orthogonal. The interferometer has good tolerance for displacement inaccuracies of the scanning mirrors (M1, M2). The interferometer may be used for producing a compact and inexpensive Fourier transform spectrometer.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: July 22, 1997
    Assignee: Opsis AB
    Inventor: Kaj Larsson