Patents by Inventor Helio T. Bittencourt

Helio T. Bittencourt 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).

  • Electroacoustic transducer
    Patent number: 5245669
    Abstract: The invention relates to an improved piezoelectric loudspeaker for high frequency, more commonly known as a tweeter. The invention embraces a technological improvement which permits the size of the tweeter to be substantially reduced while maintaining or even improving its performance when compared to other tweeters. In the device, a diaphragm is placed at least partially inside a coil so that the size of the tweeter can be reduced. The coil activates a piezoelectric element which drives the diaphragm causing it to vibrate and produce sound.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: September 14, 1993
    Assignee: Leson Laboratorio de Engenharia Sonica S.A.
    Inventor: Helio T. Bittencourt
  • Electroacoustic piezoelectric transducer having a broad operating range
    Patent number: 4996713
    Abstract: An electroacoustic piezoelectric transducer comprises a concave diaphragm and at least two planar bimorph elements having different respective resonance frequency characteristics coupled to the diaphragm. The bimorph elements may comprise larger and smaller bimorph elements providing frequency responses in lower and higher frequency ranges respectively, and are preferably directly connected to the inner concave surface of the diaphragm.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: February 26, 1991
    Assignee: S. Eletro-Acustica S.A.
    Inventor: Helio T. Bittencourt
  • Tweeter
    Patent number: D289041
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: March 31, 1987
    Assignee: Eletro-Acustica S.A.
    Inventor: Helio T. Bittencourt
  • Mid-range tweeter
    Patent number: D371367
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: July 2, 1996
    Assignee: Leson-Laboratorio de Engenharia Sonica Ltd.
    Inventor: Helio T. Bittencourt