Tire tread including hollowed zones

Details Tire tread including hollowed zones Tire tread including hollowed zones

2006-03-28

2006-03-28

Maki, Steven D. (Department: 1733)

Resilient tires and wheels

Tires, resilient

Anti-skid devices

C152S209230, C152SDIG020

Reexamination Certificate

active

07017634

ABSTRACT:
A tread (1) provided with a plurality of cutouts (5, 6, 71, 72, 73, 81, 82, 83) of essentially transverse orientation and characterized in that:when new, some of the transverse cutouts (5, 6) form on the running surface hollowed zones of average width Lt greater than or equal to 2 mm and of maximum depth Pt at most equal to 80% of the thickness Pb of tread to become worn, the other transverse cutouts (71, 72, 73, 81, 82, 83) forming on the same running surface incisions (71′, 72′, 73′, 81′, 82′, 83′) of average width Li less than 2 mm and of depth Pi at most equal to Pt;a plurality of the incisions (71′, 72′, 73′, 81′, 82′, 83′) extending by hollowed zones (71″, 72″, 73″, 81″, 82″, 83″) such that after homogenous wear of the tread the volume V1of the hollowed zones (71″, 72″, 73″, 81″, 82″, 83″) opening on to the new running surface is between 50% and 150% of the volume V0formed by the hollowed zones when new.A molding element comprising thick parts and thin parts.

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