69results about "Off-road vehicle tyres" patented technology

A motorcycle tire (1) includes crown blocks (4) including first crown blocks (6) and second crown blocks (7). Each of the first crown blocks (6) has a heel-side edge (11) formed in a V-shape and inclined at an angle (α1) of 10 to 45 degrees on both axial sides with respect to the tire axial direction. A total number of the first crown blocks (6) is in the range from 30% to 70% of a total number of the crown blocks (4). Each of the second crown blocks (7) has a second ground contacting surface shape (7a) having a maximum length (WC) in the tire axial direction smaller than a maximum length (W1) in the tire axial of the first ground contacting surface shape (6a) of each of the first crown blocks (6).

The invention relates to a vehicle pneumatic tire (1) comprising a tread (2) and sidewalls, wherein the tread (2) has a shoulder section (3) with several shoulder-side profile segments (4, 5) and two recesses (7) separating adjacent profile segments (4, 5) in the circumferential direction (6) of the vehicle pneumatic tire (1), wherein the shoulder section (3) extends from the lateral edge (8) of a ground contact surface of the tread (2) in the direction of the respective sidewall, wherein the respective recess (7) of the shoulder section (3) is radially bounded by a sub-contour (9) and circumferentially (6) by flanks (10, 11) formed on the adjacent profile segments (4, 5), wherein the sub-contour (9) of the respective recess (7) connects to the first and / or second flank (10, 11) and has a surface structure with a plurality of at least partially ring-shaped raised elements (12, 13). exhibits, with at least one survey (14,15) of a first and / or second raised element (12, 13) together with the first or second flank (10, 11) encloses a surface area (16, 17), and wherein the at least one raised element (14, 15) of the respective raised element (12, 13) is formed projecting towards the respective surface area (16, 17) and the sub-contour (9).

Provided is a motorcycle tire capable of improving traction performance and suppressing a significant decrease in slip control performance during cornering. A motorcycle tire (1). A first crown block (6) has a V-shaped leading edge (11). The leading edge (11) is inclined at an angle (α1) of 10 to 45 degrees. The total number of the first crown blocks (6) is 30 to 70% of the total number of crown blocks (4). A second tread surface shape (7a) of a second crown block (7) has a maximum length (WC) in the tire axial direction that is smaller than a first tread surface shape (6a) of the first crown block (6).

The present invention relates to a tyre comprising a plurality of lateral grooves (23), two sidewalls comprising a series of projections (28) alternating with voids (29), each of the projections comprising an upper face (281) spaced away from the sidewall (26) and at least three lateral faces (282) extending from the sidewall to the upper face (281) and, with an imaginary straight line indicating a centre of the void being inclined by an angle A, the lateral face (282) extending substantially parallel to the outer axial end of the tread being situated so as to completely cross an imaginary extension of the lateral groove (23), and the lateral faces (282) of circumferentially adjacent projections (28) having an overlap in the radial direction. The circumferential width wp of each projection (28) is at least equal to 150% of the width W of the corresponding lateral groove (23) and at most equal to 110 mm.

A tire is provided that ensures excellent block resistance and provides improved driving performance on poor roads. A shoulder area of ​​a tread section (1) is provided with a plurality of shoulder blocks (12). A side area adjacent to an outer side in a tire width direction of the shoulder area is provided with a plurality of side blocks (13). A side block (13) is located at a position on the outer side in the tire width direction of a block group consisting of two or more shoulder blocks (12) that are adjacent in a tire circumference direction.One side surface of each of the shoulder blocks (12) is provided with a curved recessed section (20) consisting of a first recessed section (21) and a second recessed section (22) extending along the tire circumference, and a third recessed section (23) connecting the first recessed section (21) and the second recessed section (22) and extending obliquely to the tire circumference. One surface of each of the side blocks (13) is provided with a curved protruding section consisting of a first protruding section (31) and a second protruding section (32) extending along the tire circumference, and a third protruding section (33) connecting the first protruding section (31) and the second protruding section (32) and extending obliquely to the tire circumference.

The invention relates to a vehicle pneumatic tire (1) comprising a tread (2) and sidewalls, wherein the tread (2) has a shoulder section (3) with several shoulder-side profile segments (4, 5) and two recesses (7) separating profile segments (4, 5) adjacent in the circumferential direction (6) of the vehicle pneumatic tire (1), wherein the shoulder section (3) extends from the lateral edge (8) of a ground contact surface of the tread (2) in the direction of the respective sidewall, wherein the respective recess (7) of the shoulder section (3) is radially bounded by a sub-contour (9) and circumferentially (6) by flanks (10, 11) formed on the adjacent profile segments (4, 5), wherein the sub-contour (9) of the respective recess (7) connects to the first and / or second flank (10, 11) and has a surface structure with a plurality of at least partially ring-shaped raised elements (12, 13). exhibits, with at least one survey (14,15) of a first and / or second raised element (12, 13) together with the first or second flank (10, 11) encloses a surface area (16, 17), and wherein the at least one raised element (14, 15) of the respective raised element (12, 13) is formed projecting towards the respective surface area (16, 17) and the sub-contour (9).

To provide a tire capable of realizing improvement of rigidity and reduction of noise.SOLUTION: A tire includes a tire body and a plurality of tread pattern structures. The tire body has a tread. The plurality of tread pattern structures each have a pattern block and one or more step-wise blocks. The pattern block has a forth tread part and a back tread part. The forth tread part goes in the revolving direction of the tire, and the back tread part goes in an opposite direction to the revolving direction of the tire. The step-wise block is connected to the back tread part of the pattern block, and has a height smaller than that of the pattern block. Due to the structure feature, the tire can improve rigidity of the tread, and stability at high-speed travel via the step-wise block, and simultaneously, reduce noise caused by abrasion of the tread.SELECTED DRAWING: Figure 1

A motorcycle tire (1) includes crown blocks (4) including first crown blocks (6) and second crown blocks (7). Each of the first crown blocks (6) has a heel-side edge (11) formed in a V-shape and inclined at an angle (α1) of 10 degrees or less on both axial sides with respect to the tire axial direction. A total number of the first crown blocks (6) is 30% or more of a total number of the crown blocks (4). A first ground contacting surface shape (6a) of each of the first crown blocks (6) has a maximum length (W1) in the tire axial direction from 60% to 70% of a tread width. Each of the second crown blocks (7) has a second ground contacting surface shape (7a) having a maximum length (WC) in the tire axial direction smaller than the maximum length (W1) of the first ground contacting surface shape (6a).

A tire that allows enhancement of running performance on a deep snow road surface is provided. A tire 1 includes a first shoulder block 3. The first shoulder block 3 includes a first tread surface 5 extending inward from a first tread end T1 in the tire axial direction, a first side surface 6 extending inward from the first tread end T1 in the tire radial direction, and a second tread surface 7 extending outward from the first side surface 6 in the tire axial direction. The second tread surface 7 extends at an angle θ of 10° or less relative to a contact line 5n extending in contact with the first tread surface 5 through the first tread end T1. At least one groove 8 is disposed in the second tread surface 7.

An off-road motorcycle tyre comprises a tread band having a central annular portion extending astride of an equatorial plane (X-X) of the tyre (1) and comprising: - a plurality of circumferentially consecutive central blocks (15) arranged astride of the equatorial plane (X-X) and having a first width (LI) in the axial direction; - a plurality of circumferentially consecutive first lateral blocks (20) arranged next to the central blocks (15) and having a second width (L2) in the axial direction; - a plurality of circumferentially consecutive second lateral blocks (60) arranged next to the central blocks (15) on the opposite side with respect to said plurality of first lateral blocks (20) and having said second width (L2) in the axial direction; wherein the ratio between said second width (L2) and said first width (LI) is comprised between 0.65 and 1.3.

A tire (1) is provided with a plurality of shoulder lug grooves (311) extending beyond a tire ground contact end (T) to a shoulder reinforcement. In addition, the plurality of shoulder lug grooves (311) have protrusions (5) that protrude from the groove bottoms of the shoulder lug grooves (311) and are disposed further to the outside in the tire width direction than the tire ground contact end (T). The distance (D1) in the tire width direction from the tire ground contact end (T) to the protruding portion (5) is within the range of 0.02 < = D1 / SH < = 0.15 with respect to the tire cross-sectional height (SH).

The invention relates to a method for adjusting the tyre pressure of a vehicle by means of a centralised tyre inflation system "CTIS"; - the vehicle comprising at least a first group and a second group of tyres (EMi), each group (EMi) comprising at least one tyre; - each group (EMi) exhibiting an initial pressure (P0i); - a predetermined target pressure (P1i) corresponding to each group (EMi); - the method consisting in carrying out a sequence of adjusting the pressure of each group (EMi) from the initial pressure (P0i) to the target pressure (P1i); - the sequence comprising at least one stage (DGi-j) for each group (EMi); each stage (DGi-j) being defined by a volume of air (Vi-j) to be added into the tyres of the group (EMi); - the sequence consisting in adjusting, stage by stage (DGi-j), the pressure of the groups (EMi), and moving onto another group (EMi) when a stage (DGi-j) has been completed, until each group (EMi) has reached its target pressure (P1i).

The pneumatic tire includes a carcass layer, a belt layer disposed on an outer side of the carcass layer in a radial direction, and a tread rubber disposed on an outer side of the belt layer in the radial direction. Additionally, the carcass layer has a cord angle of 80° or more and 100° or less. Additionally, the belt layer is formed by layering a first reinforcing belt, a second reinforcing belt that is narrower than the first reinforcing belt, and an auxiliary belt that is spaced apart from a tire equatorial plane and disposed between the carcass layer and the first reinforcing belt. Additionally, the first reinforcing belt and the second reinforcing belt have cord angles of 11° or more and 30° or less, and the auxiliary belt has a cord angle of 55° or more and 70° or less.

The invention relates to a vehicle tire with a tread having at least one shoulder-side tread block row (1) with tread blocks (4, 5) each having a shoulder-side block section (42, 52) located outside the ground contact area and having a shoulder flank (6, 9), wherein the tread blocks (4, 5) include those whose shoulder-side block section (52) is provided with a recess (11) extending from the shoulder flank (9) and a. wherein the recess (11) is completely surrounded by the shoulder flank (9) or b. wherein the recess (11) is surrounded by the shoulder flank (9) in such a U-shape that the legs of the U of the shoulder flank (9) point towards the inner block section (41, 51).The profile blocks (4, 5) include profile blocks (4) whose shoulder-side block section (42) is provided with a groove-shaped indentation (7), wherein the groove-shaped indentation (7) adjoins the shoulder flank (6) and is bounded by a bottom (7c) extending to the boundary edges (7a, 7b), which is continuously curved inwards in the section oriented transversely to the circumferential direction.

The present invention provides a motorcycle tire for uneven ground travel with superior grip at low load. The tire has a block pattern. The block pattern includes a plurality of connected block pairs. Each connected block pair has two blocks (28), and a tie (30) sandwiching and connecting the blocks (28). The tie (30) has a rear ground contact side end (40) having a height equal to or less than that of the blocks (28), and a front ground contact side end (38) having a height less than that of the rear ground contact side end (40).

The present invention provides a tire capable of further improving trafficability on bad road conditions while ensuring excellent durability of pattern blocks. A plurality of shoulder blocks (12) are provided in a shoulder region of a tread portion (1), a plurality of sidewall blocks (13) are provided in a sidewall region adjacent to the outer side of the shoulder region in the tire width direction, and one sidewall block (13) is disposed at a position on the outer side in the tire width direction of a block group comprising two or more shoulder blocks (12) adjacent to each other in the tire circumferential direction. A curved recess (20) is provided on the side surface of each of the shoulder blocks (12), the curved recess (20) comprising a first recess (21) and a second recess (22) extending in the circumferential direction of the tire, and a third recess (23) connecting the first recess (21) and the second recess (22) and extending obliquely with respect to the circumferential direction of the tire, and a curved projection is provided on the surface of each of the side blocks (13). The curved convex portion is composed of a first convex portion (31) and a second convex portion (32) which extend in the circumferential direction of the tire, and a third convex portion (33) which connects the first convex portion (31) and the second convex portion (32) and extends obliquely with respect to the circumferential direction of the tire.

The invention relates to a vehicle tire with a tread having at least one shoulder-side profile block row (1) with profile blocks (4, 5) each having a shoulder-side block section (42, 52) located outside the ground contact area with a shoulder flank (6, 9), the profile blocks (4, 5) include those whose shoulder-side block section (52) is provided with a depression (11) extending from the shoulder flank (9) and a. wherein the depression (11) is completely surrounded by the shoulder flank (9) or b. wherein the depression (11) is surrounded by the shoulder flank (9) in such a U-shape that the U-legs of the shoulder flank (9) point towards the inner block section (41, 51). The profile blocks (4, 5) include profile blocks (4) whose shoulder-side block section (42) is provided with a groove-shaped indentation (7), wherein the groove-shaped indentation (7) adjoins the shoulder flank (6) and is bounded by a bottom (7c) extending to the boundary edges (7a, 7b), which is continuously curved inwards in the section oriented transversely to the circumferential direction.

To provide a tire that can improve grip performance when driving on uneven terrain. [Solution] A tire having a plurality of blocks on the tread portion, wherein the tread portion is made of a rubber composition containing rubber components, the land ratio of the tread portion is L (%), the tanδ of the rubber composition at 70°C is 70°Ctanδ, and the modulus of the rubber composition at 300% stretch at 75°C is 75°CM 300 When expressed as (MPa), L is less than 30 and 75℃M 300 The ratio is 5.0 or higher, and L, 70°C tanδ, and 75°C M 300 A tire that satisfies the following equation (1). (L 0.5 ×70℃ tanδ) / 75℃ M 300 ≥0.13 ···(1)

A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void / solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define in the tread band a central annular portion and a pair of lateral annular portions arranged on opposite sides with respect to said central annular portion. The central annular portion comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than, 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each central block (30, 60) comprises opposite circumferentially outer faces (32, 62) having an axially central portion (32a, 62a) perpendicular to the equatorial plane and opposite axially outer portions (32b, 62b) inclined with respect to a plane orthogonal to the equatorial plane by a predetermined angle different from 90°. Each lateral annular portion comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).

Provided is a tire capable of improving poor road trafficability while ensuring excellent block durability. A plurality of shoulder blocks (12) are provided in a shoulder region of a tread portion (1), a plurality of sidewall blocks (13) are provided in a sidewall region adjacent to the outer side of the shoulder region in the tire width direction, and one sidewall block (13) is disposed at a position on the outer side in the tire width direction of a block group comprising two or more shoulder blocks (12) adjacent in the tire circumferential direction. When a surface composed of a side surface of a shoulder block (12) and a top surface of a sidewall block (13) included in a block group is defined as an upper layer surface, a first recess (15) including a middle layer surface depressed by 0.2 mm or more than the upper layer surface is provided on the center side of the upper layer surface, and a second recess (16) including a lower layer surface depressed by 0.2 mm or more than the middle layer surface is provided on the center side of the middle layer surface.

A tyre for vehicle wheels comprises a tread band including a plurality of blocks and grooves that define in the tread band a void / solid ratio comprised between 0.4 and 0.65 and that form a tread pattern which is symmetrical with respect to an equatorial plane (X-X) of the tyre. The tread pattern includes a pair of circumferential grooves (20) arranged on opposite sides with respect to the equatorial plane and which define in the tread band a central annular portion and a pair of lateral annular portions arranged on opposite sides with respect to said central annular portion. The central annular portion comprises a plurality of circumferentially consecutive central blocks (30, 60) arranged astride of the equatorial plane and having a maximum width equal to, or greater than, 50% of a radial section maximum width of the tyre. The central blocks (30, 60) are separated from one another by a respective central transversal groove (45, 50) having a circumferential length less than that of a circumferentially adjacent central block (30, 60). Each central block (30, 60) comprises opposite axially outer faces (35, 65) inclined with respect to the equatorial plane by a predetermined angle. The axially outer faces (35) of a central block (30) are inclined with respect to a plane perpendicular to the equatorial plane on opposite sides with respect to the axially outer faces (65) of a circumferentially consecutive central block (60). Each lateral annular portion comprises a plurality of circumferentially consecutive lateral blocks (80, 90) separated from one another by a respective lateral transversal groove (85, 95).

Provided is a pneumatic tire which is suitable as a tire for driving on an unpaved road and which has improved driving performance and cut resistance on the unpaved road. A pair of sidewall blocks (21) facing each other across sidewall grooves (22) extending in the width direction of the tire are provided in a sidewall region located on the outside of a shoulder region of a tread portion (1) in the width direction of the tire, and repeating elements (20) comprising the sidewall grooves (22) and the pair of sidewall blocks (21) are arranged at intervals in the circumferential direction of the tire. The tread surface of each sidewall block (21) has a concave-convex shape formed by a reference surface (21a) located on the sidewall groove (22) side and a step portion (21b) located on the opposite side of the sidewall groove (22) and protruding from the reference surface (21a), and the sidewall groove (22) is provided with a bottom raised portion (22a) protruding from the bottom of the sidewall groove (22) and connecting the pair of sidewall blocks (21).

An off-road motorcycle tyre comprises a tread band having a maximum chord (C). The tread band comprises a central annular portion (M) extending astride of an equatorial plane (X-X) of the tyre (1) and comprising a plurality of circumferentially consecutive first central blocks (15) arranged next to the equatorial plane (X-X) and a plurality of circumferentially consecutive second central blocks (50) arranged next to the equatorial plane (X-X) on the opposite side with respect to the first central blocks (15), each second central block (50) being axially adjacent to a respective first central block (15). An intermediate annular portion (5) without blocks is arranged astride of the equatorial plane (X-X) and extends between the first central blocks (15) and the second central blocks (50). Each first central block (15) and the respective second central block (50) are arranged at a respective minimum mutual distance in the axial direction such that the ratio between said minimum mutual distance and said predetermined maximum chord (C) is greater than, or equal to, 0.15.

In a tire having a tread rubber including a cap tread and a base tread disposed inward thereof, the base tread is formed from a rubber composition including a rubber component that contains 70 mass% or more of natural rubber and 35 to 60 parts by mass of a filler per 100 parts by mass of the rubber component, and having a loss factor tan δ of 0.045 or less as measured under conditions of a temperature of 60°C, a static strain of 10%, a dynamic strain of 1%, and a frequency of 10 Hz. In addition, the average peel strength when a rubber composition forming the cap tread and the rubber composition forming the base tread attached together are separated at a speed of 50 mm / min is 300 N / mm or more.

A tire 2 includes a tread 4. The tread 4 includes a plurality of blocks 18. The plurality of blocks 18 include a plurality of center blocks 28 located on an equator plane. The plurality of center blocks 28 include a main center block 28m having, in a land surface 20 thereof, a center of gravity CG of the land surface 20. At the center of gravity CG of the land surface 20 of the main center block 28m, an axial length a of the main center block 28m is not less than twice a circumferential length b thereof. The main center block 28m has a hardness of not greater than 70. The main center block 28m has a 300% modulus of not less than 8.5 MPa.

Provided is a tire comprising a tread part provided with a plurality of blocks, wherein the tread part is composed of a rubber composition comprising a rubber component, and wherein L is less than 30, 75°C M300 is 5.0 or more, and L, 70°C tan δ, and 75°C M300 satisfy the following inequality (1): L0.5×70°Ctanδ / 75°CM300≥0.13 where L represents a land ratio, in %, of the tread part, 70°C tan δ represents a tan δ at 70°C of the rubber composition, and 75°C M300 represents a modulus, in MPa, at 300% elongation at 75°C of the rubber composition.

Provided is a tire. At least one of sidewall portions includes a plurality of side blocks rising from a surface of the at least one of sidewall portions and a plurality of side grooves defined by the side blocks adjacent to each other in a tire circumferential direction, one end of the plurality of side grooves opening to an inner side in a tire radial direction. A land ratio of an area of a region of the side blocks to an area of a region defined by a first imaginary line along a ridge, which is a mold split position, and a second imaginary line along an individual leading edge portion on the inner side of a plurality of the side blocks in the tire radial direction is in a range 40%≤R1≤80%.

This invention provides a non-pneumatic tire comprising a thermoplastic elastomer pre-tensioned during the process of forming the non-pneumatic tire. This pre-tensioning is provided by a thermal method inherently available in the forming process. This results in a combination of efficient manufacturing and efficient pre-tensioning without adding the complexity of pre-tensioning mechanically.

The invention relates to a vehicle pneumatic tire (1) comprising a tread (2) with a first row of profile blocks (3) consisting of hexagonal first blocks (8) arranged one behind the other in the circumferential direction (7) and separated from each other by transverse grooves (6), wherein the first blocks (8) have parallel pairs of edges (11, 12, 13) and are each mirror-symmetrical with respect to the circumferential direction (7) of the vehicle pneumatic tire (1), wherein edges (14a, 14b) of a first pair of edges (11) of the respective first block (8) run parallel to the circumferential direction (7) and the remaining edges (15a, 15b, 16a, 16b) each form an angle with the circumferential direction (7) and with an axial direction (17) of the vehicle pneumatic tire (1), wherein the edges (14a, 14b) of the first pair of edges (11) of the respective first block (8) are chamfered at least in sections.

A mold (10) for curing a tire comprises: an upper shell (16a) for molding a tire sidewall, a lower shell (16b) for molding a tire sidewall, and a crown ring (20) of circumferential segments for molding a tire tread, each segment comprising an upper segment part (20a) suitable for being axially separated from a lower segment part (20b), the curing mold being suitable for interacting with means for actuating a radial movement of all of the segment parts simultaneously. Each lower segment part (20b) comprises a device (100) for holding the lower segment part (20b) in a radial position between a closed position of the mold and an open position thereof, the elements of the holding device (100) belonging to the lower segment part and to the lower shell (16b).