Patent ID: 6382283
Filing Date: 2002-05-07
Classification: B60C,Y10S

Abstract:
A tire for vehicle wheels, provided with a tread band, comprising:a plurality of raised blocks, each peripherally confined between at least two longitudinal grooves, substantially extending circumferentially of the tire, and at least two traverse grooves meeting the longitudinal grooves; and a first series of sipes and a second series of sipes formed in the blocks, each sipe formed according to an inclined orientation relative to a direction normal to an outer rolling surface of the tread band to divide each block into a plurality of flexible portions disposed circumferentially in side-by-side relationship, each flexible portion having a grip edge in a form of an acute angle on the outer rolling surface of the tread band; wherein each sipe extends transversely of a respective block according to a concave extension toward a grip edge of a corresponding flexible portion, wherein each of the transverse grooves is confined between a first side, substantially normal to the outer rolling surface of the tread band, and a second side, diverging from the first side toward the outer rolling surface of the tread band, and wherein each block has, close to the rolling surface of the tread band, at least one transverse edge projecting toward a corresponding transverse groove to define an undercut with the second side of the corresponding transverse groove.