Tyre for a vehicle wheel including zigzag circumferential grooves and blind transverse cuts

A tyre for a wheel of a vehicle, comprising:

• a carcass;
• a belt structure;
• and
• a tread;
• wherein the carcass comprises a central crown portion and two axially opposite sides comprising beads for mounting the tyre on a corresponding rim of a wheel,
• wherein the belt structure is coaxially associated with the carcass,
• wherein the tread extends coaxially around the belt structure,
• wherein the tread comprises a pattern, comprising:
• at least two circumferential grooves;
• and
• at least three circumferential ribs;
• wherein said each of the at least two circumferential grooves comprises a zigzag configuration,
• wherein the at least three circumferential ribs comprise at least one central rib and two shoulder ribs,
• wherein said each of the at least two circumferential grooves further comprises a shape that is repeated identically according to a predetermined circumferential pitch,
• wherein said each of the at least two circumferential grooves further comprises, within a single pitch, substantially rectilinear portions,
• wherein the substantially rectilinear portions are alternately inclined with respect to a circumferential direction of the tyre,
• wherein said each of the at least two circumferential grooves further comprises, within the single pitch, first, second, and third changes in direction, at least two of the first, second, and third changes in direction being disposed outside of at least one blind transverse cut intersecting a corresponding one of the at least two circumferential grooves, with respect to a circumferential direction of the tread, and extending from opposite sides of the circumferential groove,
• wherein a first end of a first one of at least one blind transverse cut of a first one of the at least two circumferential grooves is positioned on a first plane between the first one of the at least two circumferential grooves and an adjacent second one of the at least two circumferential grooves,
• wherein a second end of second one of at least one blind transverse cut of a second one of the at least two circumferential grooves is positioned on a second plane between the first one of the at least two circumferential grooves and the second one of the at least two circumferential grooves,
• wherein the first and second planes are parallel to each other and to an equatorial plane of the tyre,
• wherein the first and second planes delimit a continuous portion of at least one of the circumferential ribs,
• wherein the continuous portion comprises a constant axial width,
• wherein axially opposite ends of the at least one blind transverse cut of the first one of the at least two circumferential grooves are disposed on a straight line,
• wherein the straight line is perpendicular to the equatorial plane of the tyre,
• wherein the first one of the at least two circumferential grooves and the second one of the at least two circumferential grooves comprise rectilinear portions,
• wherein a circumferential extension of the at least one blind transverse cut comprises one of the rectilinear portions of a corresponding one of the at least two circumferential grooves,
• wherein the rectilinear portion is oriented in one of the different directions,
• wherein an axis of the at least one blind transverse cut comprises a broken line segment with three parts,
• wherein the three parts comprise a central part and two end parts, and
• wherein the rectilinear portion comprises the central part.

A tyre for a wheel of a vehicle, comprising:

• a carcass;
• a belt structure;
• and
• a tread;
• wherein the carcass comprises a central crown portion and two axially opposite sides comprising beads for mounting the tyre on a corresponding rim of a wheel,
• wherein the belt structure is coaxially associated with the carcass,
• wherein the tread extends coaxially around the belt structure,
• wherein the tread comprises a pattern, comprising:
• at least two circumferential grooves;
• and
• at least three circumferential ribs;
• wherein each of the at least two circumferential grooves comprises a zigzag configuration,
• wherein the at least three circumferential ribs comprise at least one central rib and two shoulder ribs,
• wherein each of the at least two circumferential grooves further comprises a shape that is repeated identically according to a predetermined circumferential pitch,
• wherein each of the at least two circumferential grooves further comprises, within the single pitch, at least one blind transverse cut intersecting said each of the at least two circumferential grooves and extending from opposite sides of said each of the at least two circumferential grooves,
• wherein each of the at least two circumferential grooves further comprises, within the single pitch, first, second, and third changes in direction, at least two of the first, second, and third changes in direction being disposed outside of said at least one blind transverse cut with respect to a circumferential direction of the tread, and each change in direction being different from a circumferential direction of the tyre,
• wherein at least two different directions associated with at least one of the first, second, and third changes in direction generate at least two ground-gripping fronts in each of two rotation directions of the tyre,
• wherein the at least one blind transverse cut generates a third ground-gripping front in each of the two rotation directions of the tyre,
• wherein a first end of at least one blind transverse cut of a first one of the at least two circumferential grooves is positioned on a first plane between the first one of the at least two circumferential grooves and an adjacent second one of the at least two circumferential grooves,
• wherein an end of at least one blind transverse cut of the second one of the at least two circumferential grooves is positioned on a second plane between the first one of the at least two circumferential grooves and the second one of the at least two circumferential grooves,
• wherein the first and second planes are parallel to each other and to an equatorial plane of the tyre,
• wherein the first and second planes delimit a continuous portion of at least one of the circumferential ribs,
• wherein the continuous portion comprises a constant axial width,
• wherein axially opposite ends of the at least one blind transverse cut of the first one of the at least two circumferential grooves are disposed on a straight line,
• wherein the straight line is perpendicular to the equatorial plane of the tyre,
• wherein the axially opposite ends of the at least one blind transverse cut each define an axis, and the straight line intersects the axially opposite ends of the at least one blind transverse cut at end points of the axes of the axially opposite ends,
• wherein the first one of the at least two circumferential grooves and the second one of the at least two circumferential grooves comprise rectilinear portions,
• wherein a circumferential extension of the at least one blind transverse cut comprises one of the rectilinear portions of a corresponding one of the at least two circumferential grooves,
• wherein the rectilinear portion is oriented in one of the different directions,
• wherein an axis of the at least one blind transverse cut comprises a broken line segment with three parts,
• wherein the three parts comprise a central part and two end parts, and
• wherein the rectilinear portion comprises the central part.