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Washer-type pressure sensor

  • US 4,996,873 A
  • Filed: 11/27/1989
  • Issued: 03/05/1991
  • Est. Priority Date: 10/19/1987
  • Status: Expired due to Fees
First Claim
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1. A washer-type pressure sensor comprising:

  • a ring-shaped electrode having an output terminal extending therefrom;

    a pair of piezoelectric elements provided on both sides of said electrode;

    first and second pressure plates provided outside of respective piezoelectric elements;

    an electrically insulating retainer holding said ring-shaped electrode, said piezoelectric elements and at least said first pressure plate in an assembled condition; and

    an electrically conductive cover member having a first section extending along the outer circumferential periphery of said insulating retainer for covering the same, said cover member being electrically insulated from said first pressure plate by said insulating retainer.

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