Patents Examined by Khann Dang
  • Acoustic system with transducer and venturi
    Patent number: 5088575
    Abstract: An acoustic system has a chamber (12) having an input (14) for receiving an input acoustic wave and guiding the input acoustic wave along a flowpath (16) to a chamber output (18), an acoustic transducer (20, 22, 24) interacting with the acoustic wave in the chamber (12), and a venturi (30, 32, 34) drawing air into the flowpath (16) to flow to the chamber output (18). The venturi aspirates internal areas of the chamber to keep the acoustic transducers clean and/or aspirates external air into the chamber past the transducers to cool same.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: February 18, 1992
    Assignee: Nelson Industries, Inc.
    Inventor: Larry J. Eriksson