SPARK PLUG HAVING AN INSULATOR COMPOSED OF HIGH-PURITY ALUMINIUM OXIDE CERAMIC

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United States of America Patent

APP PUB NO 20100007260A1
SERIAL NO

12448116

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A spark plug is described for Otto-cycle engines having a metallic spark plug body, having a center electrode, having a ceramic insulator, which is arranged between the center electrode and the body and is based on aluminium oxide, and having at least one earth electrode. The invention provides for the insulator to be composed of 0.01% by weight to 1% by weight of magnesium oxide, at most 0.3% by weight of natural and/or impurities, with the rest being aluminium oxide, and being formed by solid-phase sintering so that it is very largely free of glass phases.

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Patent Owner(s)

Patent OwnerAddress
BERU AKTIENGESELLSCHAFT71636 LUDWIGSBURG

International Classification(s)

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  • 2007 Application Filing Year
  • H01T Class
  • 115 Applications Filed
  • 72 Patents Issued To-Date
  • 62.61 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances200720082009201020112012201320140255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Knoch, Martin Coburg, DE 39 1783
Niessner, Werner Steinheim, DE 53 373
Stetter, Klaus Sonnefeld, DE 2 20

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Patent Citation Ranking

  • 1 Citation Count
  • H01T Class
  • 8.33 % this patent is cited more than
  • 15 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges21542101 - 1011 - 2021 - 3061 - 70012345678910111213141516

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