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Ultrasonic load indicating member

  • US 4,846,001 A
  • Filed: 09/11/1987
  • Issued: 07/11/1989
  • Est. Priority Date: 09/11/1987
  • Status: Expired due to Term
First Claim
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1. A load indicating member comprising:

  • a shank, which, when stressed longitudinally, is subject to elastic deformation such that one portion thereof moves relative to another portion thereof;

    a first generally flat surface formed adjacent one longitudinal end of said shank;

    first electrode means permanently, mechanically, electrically, and acoustically interconnected with said shank;

    piezoelectric film means permanently, mechanically, and electrically interconnected with said first electrode means;

    second electrode means permanently, mechanically, and electrically interconnected with said piezoelectric means and electrically isolated from said head and said first electrode means, such that said electrode means and said piezoelectric means cooperate to form an ultrasonic transducer; and

    a second generally flat surface formed on said shank at a location remote from said one longitudinal end of said shank, said second flat surface being generally coplanar with said first flat surface and spaced a predetermined distance therefrom.

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