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Pressure sensor utilizing extension type conductive rubber

  • US 5,045,829 A
  • Filed: 03/02/1990
  • Issued: 09/03/1991
  • Est. Priority Date: 02/23/1990
  • Status: Expired due to Fees
First Claim
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1. A pressure sensor comprising:

  • a housing;

    a sheet of an electrically insulative elastomer;

    a like-shaped sheet of an extension type conductive elastomer overlaying said electrically insulative elastomer and having a plurality of spaced radial recesses formed around the periphery thereof, which extension type conductive elastomer, when extended, exhibits a decrease in its electrical resistance value in response to the magnitude of an applied extension;

    first and second spaced electrodes that are each electrically connected to said extension type conductive elastomer at the periphery thereof; and

    first and second support means, each of which are cylindrical or ring shape and are made of an electrically insulative material for mounting in said housing to sandwich said overlaying extension type conductive elastomer and said electrically insulative elastomer around their periphery, with said electrically insulative elastomer squeezed therebetween continuously around the periphery thereof and with said extension type conductive rubber squeezed therebetween discontinuously around the periphery thereof in the sections between the electrodes.

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