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Ultrasonic range finder

  • US 7,330,398 B2
  • Filed: 07/06/2006
  • Issued: 02/12/2008
  • Est. Priority Date: 07/08/2005
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic range finder comprising:

  • a housing;

    an ultrasonic transmitting and receiving unit positioned within the housing;

    a signal processing circuit, which is mounted in the housing and is connected with the ultrasonic transmitting and receiving unit;

    a group of operation buttons on the housing which includes at least a calibration button;

    a display unit, for displaying the result of a distance measurement; and

    ,a calibration member which has a first end connected to the housing, wherein the calibration member is comprised of a plurality of telescoping members, which when fully extended, extend outwardly from the housing.

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