Abstract:
In a pneumatic tire, a first shoulder block comprises at least one first shoulder circumferential groove which extends in a tire circumferential direction, the at least one first shoulder circumferential groove is respectively separated from a pair of first shoulder slits, a center block comprises at least one center circumferential groove which extends in the tire circumferential direction, and the at least one center circumferential groove is respectively contiguous with a pair of center slits.
Abstract:
A pneumatic tire includes a tread surface, a plurality of circumferential main grooves formed on the tread surface and extending in a tire circumference direction, a plurality of lug grooves formed on the tread surface and extending in a tire lateral direction, a plurality of blocks defined by the lug grooves on both sides in the tire circumferential direction and by the circumferential main grooves on at least one end in the tire lateral direction, and narrow grooves formed in the blocks. The narrow grooves include a plurality of bent portions as well as a circumferential narrow groove extending in the tire circumference direction and a lateral narrow groove extending in the tire lateral direction. The lateral narrow groove and the circumferential narrow groove are configured so that at least one thereof is provided in a plurality and includes a plurality of intersection points where the one intersects the other.
Abstract:
Tire tread (1) is divided into central part (20) and edge parts (30), central part (20) having width Lc between 40% and 90% of total width W of the tread. Edge parts (30) do not have any transverse cuts. Central part (20) has a tread pattern with circumferentially oriented sipe (21) and transversely oriented sipes (22, 22′, 22″) distributed around the periphery of the tread, such sipes having a depth at least equal to 60% of thickness E of material to be worn away and being interconnected to form a network. Such sipes are continued by hidden channels (210, 220). Central part (20) is delimited axially by transverse sipes (22′, 22″), each of which ends in end channel (221′, 221″) that opens onto tread surface (10) and extends into the thickness of the tread, and each end channel (221′, 221″) is connected to the network formed by the hidden channels.
Abstract:
A pneumatic tire has a tread portion provided with two crown main groove and two shoulder main grooves and divided into a center land zone, two middle land zones and two shoulder land zones. The middle land zone is provided with middle auxiliary grooves. The shoulder land zone is provided with shoulder axial grooves. The width of the shoulder axial groove at the axially outer end is more than the width of the shoulder axial groove at the axially inner end. Through the shoulder main groove, the shoulder axial grooves are continued to the respective middle auxiliary grooves.
Abstract:
A tire includes annular beads, a body ply extending between the annular beads, and a circumferential belt disposed radially outward of the body ply. The tire further includes a circumferential tread disposed radially outward of the circumferential belt. At least three circumferential grooves divide the tread into two outer circumferential ribs and two inner circumferential ribs. A plurality of rib sipes are disposed on at least one circumferential rib. The tire includes a plurality of curvilinear spline sipes, wherein each curvilinear spline sipe has multiple inflection points. At least one curvilinear spline sipe is disposed on an outer circumferential rib and at least one curvilinear spline sipe is disposed on a different circumferential rib. A localized depth of the at least one curvilinear spline sipe disposed on the outer circumferential rib varies in proportion to the distance from the rib sipes that intersect the at least one curvilinear spline sipe.
Abstract:
Provided is a pneumatic tire where grooves and blocks defined by the grooves are formed on a tread portion, wherein the block includes: a ground contact surface; a hole portion formed in a center portion of the ground contact surface; and sipes extending radially from the hole portion which is the center of radial extension of the sipes, and the sipes are formed such that inner ends of the sipes in a radial direction terminate at a position away from the hole portion, and outer ends of the sipes in the radial direction terminate within the block.
Abstract:
A pneumatic vehicle tire is for use in winter driving conditions and defines an axial direction (aR) and a circumferential direction (uR). The pneumatic vehicle tire includes a tread having a plurality of profile blocks. The profile blocks have sipes. The tread has two axially outwardly arranged shoulder regions and further has a central tread region arranged between the two shoulder regions. The profile blocks each have two profile block edges. The profile blocks each have a surface defining a plurality of grooves therein. The grooves are arranged in parallel and extend from one of the two profile block edges to the other one of the two profile block edges. The grooves are arranged approximately in the axial direction (aR) in the central tread region and approximately in the circumferential direction (uR) in the shoulder regions.
Abstract:
A pneumatic tire comprises, in a tread portion 1, at least two block groups GB1 to GB3 whose block number density is within a range of 0.003 pieces/mm2 to 0.04 pieces/mm2. At least one block group GB2 includes block 4 in which lateral length BW2 is larger that its longitudinal length BL2.
Abstract translation:充气轮胎在胎面部1中包括块数密度在0.003个/ mm 2〜0.04个/ mm 2的范围内的至少两个块组GB1〜GB3。 至少一个块组GB2包括其横向长度BW2大于其纵向长度BL2的块4。
Abstract:
A vehicle wheel tire includes a tire tread having a circumferential center tread region in which block elements are arranged in a symmetric pattern on opposite sides of a tire circumferential equatorial centerplane. Symmetrically disposed block elements on opposite sides of the centerplane have a plurality of spaced apart and laterally extending wavy sipes extending across the block element. Selective pairs of adjacent sipes are interconnected by one or more circumferentially oriented notches. The wavy sipes have regions of varying depth and include one or more recessed region(s) and one or more non-recessed region(s). A circumferentially disposed notch interconnecting a pair of adjacent wavy sipes at opposite notch ends intersects the wavy sipes at non-recessed sipe regions.
Abstract:
A pneumatic tire for ice-bound or snow-covered roads, which has fine grooves formed in a tread surface, thereby improving brake and drive performance on ice-bound roads in early periods of wear. This pneumatic tire for ice-bound or snow-covered roads has its tread partitioned into a plurality of lands, these lands being formed with sipes, wherein the tread surface at the lands is formed with a plurality of fine grooves shallower than the sipes, the edges of these fine grooves being curved. Further, the width of the openings of the fine grooves is larger than the width of the bottoms thereof. Further, the angle of the fine grooves with the circumferential direction of the tire is 42 to 60 degrees.