Title:
TYRE, PARTICULARLY SUITABLE FOR SNOW-COVERED GROUND
Document Type and Number:
WIPO Patent Application WO/2003/013881
Kind Code:
A1
Abstract:
Tyre for snow-covered ground, comprising a treat (14) provided with a relief pattern delimited by a plurality of circumferential (15) and transverse (16) grooves forming a plurality of longitudinal rows (17, 18, 19, 20, 21) of blocks (23, 33, 40, 49), in which each block is delimited between a pair of longitudinal lateral surfaces (24, 25) and a pair of transverse lateral surfaces (26, 27) which in combination form the walls of the grooves. Each block has, between the top surface (28) and the wall of at least one groove, a notch (29, 29', 30, 34, 41, 42, 45, 46, 47, 48, 50, 51, 52, 60) which is significantly elongated in the direction of the groove in whose wall it is formed. The notch has a shape tapered between a base an a vertex and its depth relative to the top surface has a maximum value at the base and a zero value at the vertex. Preferably, each block comprises at least two longitudinal notches which are tapered towards the vertices in opposite directions to each other.
Inventors:
COLOMBO GIANFRANCO (IT)
VEGRO ANDREA (IT)
VEGRO ANDREA (IT)
Application Number:
PCT/EP2002/008411
Publication Date:
February 20, 2003
Filing Date:
July 29, 2002
Export Citation:
Assignee:
PIRELLI (IT)
COLOMBO GIANFRANCO (IT)
VEGRO ANDREA (IT)
COLOMBO GIANFRANCO (IT)
VEGRO ANDREA (IT)
International Classes:
B29D30/06; B60C9/20; B60C11/03; B60C11/00; B60C11/04; B60C11/11; B60C11/13; (IPC1-7): B60C11/11; B60C11/13
Foreign References:
| EP0354718A2 | 1990-02-14 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29)
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29)
Attorney, Agent or Firm:
Bottero, Carlo (222 Milano, IT)
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