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Wear indicator for vehicle tires

  • US 6,523,586 B1
  • Filed: 06/23/2000
  • Issued: 02/25/2003
  • Est. Priority Date: 06/29/1999
  • Status: Expired due to Term
First Claim
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1. Tyre tread for vehicle tyre, said tread being provided with main grooves and with tread pattern pieces, circumferential ribs and/or tread pieces, the surface of said tread pattern pieces, ribs and/or tread pieces being in contact with a road are provided with indicators indicating groove depth of a main groove and having the form of sipes, said indicators extending radially into the tyre tread, and the cross-section of each indicator in the direction of the tread surface being formed into a number, characterized in that the number extends over the whole radial extension of the indicator and directly denotes a minimum remaining depth of the main groove, whereby each indicator disappears from the tread when wearing of the tread has advanced to the groove depth indicated by the number of the indicator, and that a momentary groove depth can be read from those indicators of the indicators still remaining in the tread which have the number disclosing the highest value.

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