Pneumatic agricultural tire

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 11/11 (2006.01) B60B 15/00 (2006.01) B60C 11/00 (2006.01) B60C 11/03 (2006.01) B60C 11/04 (2006.01) B60C 11/12 (2006.01)

Patent

CA 2176268

A pneumatic agricultural tire 20 has a tread 32 having a plurality of central lugs 50 arranged in a circumferentially continuous row and extending across the equatorial plane. Each central lug 50 is similar but oppositely oriented relative to each circumferentially adjacent central lug 50. Each central lug 50 has a circumferentially extending leading end portion 51 and a circumferentially extending trailing end portion 53. The leading and trailing end portions 51,53 are located on opposite sides of the equatorial plane. The end portions 51,53 being connected by a middle inclined portion 55, the middle inclined portion 55 being oriented at an angle .theta. of 50° or less relative to the equatorial plane. This central lug 50 in combination with pluralities of first and second shoulder lugs 40,42 provides excellent traction.

Cette invention concerne un pneumatique à usage agricole 20 dont la semelle 32 comporte une pluralité de barrettes centrales 50 formant une rangée continue circonférentielle et s'étendant de part et d'autre du plan équatorial. Toutes les barrettes 50 sont identiques sauf que les barrettes formant une paire sont orientées en sens opposés. Chaque barrette 50 comporte une rive d'attaque circonférentielle 51 et une rive de fuite circonférentielle 53. Les rives d'attaque et de fuite 51, 53, qui se trouvent de part et d'autre du plan équatorial, sont reliées par une partie centrale inclinée 55 qui fait un angle thêta d'au plus 50 degrés avec le plan équatorial. Ces barrettes centrales 50 offrent, en combinaison avec une pluralité de barrettes formant des rangées latérales, une excellente traction.

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