Pneumatic tire for use on iced and snowed road surfaces

B - Operations – Transporting – 60 – C

Patent

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Details

B60C 11/12 (2006.01) B60C 11/11 (2006.01)

Patent

CA 2433823

A pneumatic tire for use on iced and snowed road surfaces has a tread surface. The tread surface has a plurality of main grooves extending in a circumferential direction of the tire and a plurality of lateral grooves extending in a width direction of the tire. Blocks are defined by the main grooves and the lateral grooves. The blocks have a ground contact face which has a plurality of pairs of sipes comprising a left sips and a right sips extending in the tire width direction. The plurality of pairs of sipes are placed in a predetermined interval in the tire circumferential direction. Each of the left and right sipes of each pair extends from a width-directional center portion of the ground contact face of the block toward each way of the tire width direction so as to open its outer end to each side face of the block.

Un pneumatique conçu pour les surfaces de roulement glacées et enneigées possède une surface à relief. La surface à relief est composée de plusieurs rainures principales qui s'étendent dans le sens de la circonférence du pneu et plusieurs rainures latérales qui s'étendent dans le sens de la largeur du pneu. Des blocs sont formés par les deux types de rainures. La surface de contact au sol des blocs possède plusieurs paires de lamelles composées d'une lamelle gauche et d'une lamelle droite qui s'étendent en direction de la largeur du pneu. Ces paires de lamelles sont placées à un intervalle prédéterminé dans le sens de la circonférence du pneu. Chacune des lamelles gauches et droites de chaque paire s'étend de la partie centrale du sens de la largeur de la surface de contact au sol du bloc en direction de chaque côté du pneu dans le sens de la largeur du pneu afin d'exposer son extrémité extérieure à la facette latérale du bloc.

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