Characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping (B60C11/13)

B60   Vehicles in general(31273)
B60C11/13                     Characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping(65)

Thick protector for construction machinery // 2614401
FIELD: transport.SUBSTANCE: invention relates to automotive tire. Tread comprises blocks (3) in the central part and the boundary edges (2, 4). Every boundary edge (2, 4) has numerous deepenings (21, 41) forming saddles. Each saddle is limited by the walls oriented in the transverse direction over its entire height, and the wall, oriented in the circumferential direction. Each saddle (21, 41) has a geometry suitable for receiving at least the end part of the central zone with the backlash Ac (measured in the circumferential direction) and the transverse gap AT (as measured in the transverse or axial direction). These Ac and AT gaps are determined so as to ensure that under normal operating conditions of the tire provided with the noted tread, the end part (302, 304) of the block central zone will be at least partially in contact with at least one of the walls of each saddle (21, 41) oriented in the transverse direction, thereby preventing the contact of each of the blocks (3), the ends of which are locked in these recesses, with the adjacent blocks of the central row.EFFECT: invention provides an improved tire traction characteristics with the ground, as well as increase strength and the tire tread durability.7 cl, 4 dwg

Tread containing sculptural elements coated with impregnated fibers compound // 2614375
FIELD: transportation.SUBSTANCE: tread for a pneumatic tyre comprises a plurality of sculptural elements, including the lateral sides and the contact surface intended for performing the contact with the road during the movement of the pneumatic tyre provided with said tread. At least one edge forms the contact boundary of the contact surface with the road. A plurality of cutouts in the form of a track and / or a cut also is represented, wherein said cutouts are bounded by the lateral sides disposed opposite one another. Each sculpture element is formed by at least one first rubber mixture called basic mixture. In the sectional view of a plane normal to the rotation axis of said pneumatic tyre and intersecting at least one contact surface sculptured element, wherein one of the cutouts adjacent to said contact surface is coated, at least partially, with the coating layer. The coating layer comprises a plurality of woven or non-woven fibers that are long fibers with the length greater than 50 mm.EFFECT: improved characteristics of pneumatic tyres on wet surfaces.32 cl, 9 dwg, 3 tbl
Pneumatic tyre // 2608550
FIELD: motor industry.SUBSTANCE: invention relates to automotive industry. Tread comprises inner and outer edges, of internal and external central main grooves passing in longitudinal direction, located on both sides of tire equator and limiting central area between them, inner and outer shoulder main grooves passing in longitudinal direction, arranged axially outside from internal and external central main grooves, two medium areas, including inner middle area, limited by inner central main groove and inner shoulder main groove, and outer middle area limited by outer central main groove and outer shoulder main groove, two shoulder areas. Outer shoulder main groove has width smaller than that of other main grooves. Outer middle area has width exceeding that of inner middle area. There are also shoulder transverse grooves, each of which passes from outer edge to tire equator beyond outer shoulder main groove limits.EFFECT: improved stability of steering and uneven wear resistance while maintaining drainage characteristics.10 cl, 4 dwg, 1 tbl

Pneumatic tyre // 2605808
FIELD: motor vehicle industry.SUBSTANCE: invention relates to automotive industry, in particular, to winter tire. Tread 2 of pneumatic tire is divided by central longitudinal grooves and shoulder longitudinal grooves onto central portion 6, outer middle portion 7A, inner middle portion 7B, outer shoulder portion 8A and inner shoulder land portion 8B. Outer shoulder portion 8A includes a number of external shoulder blocks 22 separated by outer shoulder longitudinal grooves 5A. Inner shoulder portion 8B includes inner shoulder longitudinal grooves 26 containing inner end 26i and outer end 26o within portion 8B, and inner shoulder auxiliary grooves 28 located between inner shoulder longitudinal grooves 26, 26, adjacent in longitudinal direction, and containing inner end 28i and outer end 28o within portion 8B. Inner mid portion 7B includes inner middle additional groove 18 extending continuously in longitudinal direction, and the inner middle connecting bars 21.EFFECT: improved drainage characteristics of tire, as well as running characteristics on snowy and icy road while maintaining stable steering on dry road surface.6 cl, 5 dwg, 1 tbl

Pneumatic tyre // 2602619
FIELD: transport.SUBSTANCE: invention relates to automotive industry. On tread surface there are narrow grooves with intervals in circumferential direction of a tire. Every narrow groove passes at an angle to the tire circumferential direction and has the width less than its depth. On one end section of the narrow groove there is an inlet part passing in the tire circumferential direction, wherein the inlet part is connected to the narrow groove by one end and is finished by the other end on the groove wall surface on the side of an end point of the circular, component of the first vector of the narrow groove walls surfaces, which are faced to each other in the tire circumferential direction, at that, the first vector passes from one end of the narrow groove to the other end of the narrow groove.EFFECT: technical result is improvement of heat dissipation without increasing the total volume of grooves.7 cl, 9 dwg, 1 tbl

High-capacity pneumatic tyre // 2601992
FIELD: motor vehicle industry.SUBSTANCE: present invention relates to automotive industry, in particular, to pneumatic tires. High-capacity pneumatic tire comprises tread, two circumferential grooves, plurality of transverse grooves and tread sett. Sett is equipped with two small grooves, having average depth less than circumferential grooves. Grooves average depth makes more than 20 % and less than 80 % of circumferential grooves depth. Two of small grooves extend into one of transverse grooves and circumferential grooves. One of other small grooves extend into each of two small grooves.EFFECT: achieving better removal of dirt around sett center.9 cl, 8 dwg

Tyre // 2601793
FIELD: machine building.SUBSTANCE: invention relates to tire, preventing overheating in motion. Tire comprises tread with groove passing in circumferential direction, plurality of ledges placed at groove bottom, each running from one side wall to opposite. On one of side walls a recess is made, guiding one-way air flow through grouser groove in circumferential direction. In tire surface projection recess is triangular and located opposite to grouser groove, including output into groove. Recess top is located in grouser groove extension direction and shifted from its center, positioned on such grouser groove central line, perpendicular to said grouser groove extension direction. At that, ledges are arranged in groove with preset intervals.EFFECT: achieved tread in motion overheating prevention.6 cl, 1 tbl, 20 dwg

Pneumatic tyre // 2599856
FIELD: equipment and accessories for vehicles.SUBSTANCE: invention relates to a pneumatic tyre with a tread pattern. Tread pattern comprises a set of main grooves, multiple grouser grooves containing multiple central and intermediate grouser grooves to form a plurality of central and intermediate blocks of the contact surface, respectively. Herewith each of two internal main lengthwise grooves comprises first and second walls of the groove facing the first wall of the groove. Each of two external main lengthwise grooves includes a pair of the first or the second walls of the groove facing each other.EFFECT: provided is balance between wear resistance on dry road surfaces and stable steering on wet road coat, as well as stable steering on snow.16 cl, 13 dwg, 2 tbl

Pneumatic tyre // 2599080
FIELD: machine building.SUBSTANCE: invention relates to automotive winter tires. Pneumatic tire includes tread provided with two main crown grooves extending in lengthwise direction arranged on both sides of tire equator; inclined transverse grooves, each of which passes axially with tire outer side of each main crown groove to each edge of thread in direction opposite to rotation, with provision of shoulder blocks between main crown grooves and edges of tread and lamellas. Said inclined crosswise grooves have inclination angle from 45 to 85° relative to tire lengthwise direction. Each shoulder block comprises rear edge and front edge comes in contact with road later than rear edge in preset direction of tire rotation. Said rear edge has curvature radius of 150-250 mm. All lamellae on shoulder blocks end without connection with rear edges.EFFECT: technical result is improved running characteristics of tire on snow-covered roads while maintaining stability of steering, drainage properties and running characteristics on icy roads.10 cl, 4 dwg, 1 tbl

Tyre for heavy load vehicle wheels // 2595728
FIELD: equipment and vehicle accessories.SUBSTANCE: tyre comprises tread (2) provided with blocks (201-204) formed between longitudinal (205-207) and transverse grooves. Between blocks particularly broad intersections (212) are formed, for example by staggering substantially transverse grooves of circumferential rows axially in side-by- side relationship, of blocks with rounded corners. Inside such broad intersections (212) a stocky-shaped protrusion (216) is arranged which has a lateral stiffness greater than lateral stiffness of surrounding blocks (201-204).EFFECT: better grip on asphalt roads, and off-road in terms of road grip, comfort and noise level.12 cl, 5 dwg

Tyre // 2593660
FIELD: machine building. SUBSTANCE: invention relates to tire. Tire comprises tread with groove, formed in circumferential direction of tire, plurality of ledges placed at groove bottom, each of which passes from one of side walls, forming groove to other side wall, located opposite. Projections are located in groove with preset intervals. At that, in projection on tire tread surface each protrusion is divided into several segments. EFFECT: efficient prevention of overheating of thread during vehicle motion. 8 cl, 1 tbl, 31 dwg

Pneumatic tyre // 2589192
FIELD: machine building.SUBSTANCE: invention relates to automotive industry and concerns an all-season tyre tread. Tyre comprises multiple main lengthwise grooves (21-23) extending in longitudinal direction of tyre, as well as multiple surfaces for contact with road surface (31-34), separated and formed by said main lengthwise grooves (21-23) in area of tread. Each of said surfaces for contact with road surface (31-34) has multiple recesses (312-342) respectively. At least 90 % of recesses (312) and (322) located in inner area are two-dimensional recesses and not less than 90 % of recesses (332) and (342) located in external area are three-dimensional recesses. Number N_in of lug grooves (311) in shoulder surface of contact with road surface (31) on side of inner area and number N_out of lug grooves (341) in shoulder surface of contact with road surface (34) on side of outer area relate so that N_in > N_out.EFFECT: technical result is improved stability on dry, and on snow-covered road surface.8 cl, 7 dwg

Pneumatic tyre // 2588626
FIELD: automotive industry.SUBSTANCE: invention relates to automotive industry. Contour shape of the tread is formed by a single arc under conditions in which the degree of flattening is more than 55 % and less than 70 % and the inner pressure amounts to 5 %. Tread includes main longitudinal grooves including the main shoulder longitudinal grooves, and shoulder lateral grooves located in the shoulder region of contact with the ground. Shoulder lateral grooves extend at an angle of α 80 to 90° from the axially outer edge of the tread having contact with the ground to the axially inside of the tire, and the axially inner ends located within the shoulder region of contact with the ground. Axial distance Ds between the axially inner end of the shoulder and the main circumferential groove is 3.5 to 5.5 mm, the shoulder lateral groove has a deepest portion where the groove depth is greatest, and the depth of the deepest part is 70 to 90 % of the depth shoulder circumferential main grooves.EFFECT: technical result - reduced wear in the shoulder region without deteriorating noise characteristics.7 cl, 8 dwg, 1 tbl

Tyre // 2584637
FIELD: motor industry.SUBSTANCE: invention relates to automotive industry. Tire (1) has multiple projections (500) at groove (50B2) bottom. Projections (500) pass from one sidewall (50B1) to other side wall (50B3), wherein side walls form groove. Projections (500) are located in groove with preset intervals. Lateral grooves (60) pass from side of tread (9) and have outputs (60a) into it. Air supply facilities (100R) supply air in lateral (60) grooves.EFFECT: reduced tire heating.6 cl, 20 dwg

Pneumatic tyre // 2578702
FIELD: motor industry.SUBSTANCE: invention relates to automotive industry and a tyre tread intended for snow, ice and wet roads. On surface of tyre tread there are blocks (18) located in central zone (22), tread having a width of X% (30≤X≤70) of width TW of tread contact zone with tyre equatorial line C as a center, formed elongated in tyre circumferential direction, so that ratio (S1/S2) of block sizes is not less than 1.5. At least one end of sipes (20), defined in longitudinal direction of sipes (20) made in blocks (18) is connected to longitudinal groove (14). Protrusion (30) and recess (32), which can contact interact with each other, are made on surfaces of walls of sipes, which face each other, forming sipes (20), in end in longitudinal direction of part of sipes (20), which is connected to longitudinal groove (14).EFFECT: technical result is improved characteristics of tyre adhesion with snow-covered, icy and wet road surfaces while maintaining stability on dry road surfaces.13 cl, 16 dwg, 4 tbl

Air tire // 2575532
FIELD: motor car construction.SUBSTANCE: tire (1 comprises the groove with multiple ledges (500) made at its bottom (50 B2). Ledges (500) extend from one groove sidewall (50B1) to opposite sidewall (50B3). Said ledges (500) are arranged in said groove at preset spacing P complying with the condition 0.75≤P≤10L, where L is the ledge length along central axis of the groove extending along the groove width centre. Distance (DL) in direction over the tread width from the end of the breaker shortest ply to the groove central line (WL) makes at least 200 mm.EFFECT: reduced tire overheating, hence longer life.9 cl, 21 dwg, 1 tbl

Pneumatic tire // 2575335
FIELD: motor car construction.SUBSTANCE: tread pattern comprises two first main lengthwise grooves, shoulder surfaces of contact with the road surface and shoulder grouser grooves, shoulder cutouts and narrow lengthwise grooves. Note here that said shoulder grouser grooves converge at the centre, in the area of the shoulder surface of contact with the road surface, without connection with the first main lengthwise grooves. Said grooves comprises the first and second areas located closer to the first main lengthwise grooves than the first areas and feature the depth smaller as compared with the first areas. Shoulder cutouts are coupled with the second areas to extend to the first main lengthwise grooves. The narrow lengthwise grooves extend in lengthwise direction of the tire and feature the width smaller than that of the shoulder grouser grooves. Said narrow lengthwise grooves intersect the second shoulder grouser grooves.EFFECT: perfected balance between wear resistance on dry road surface, stable steering on wet surface and stable steering on ice.12 cl, 10 dwg, 9 tbl

Air tire // 2573190
FIELD: motor car construction.SUBSTANCE: tire (1) has the groove on bottom (50B2) with multiple ledges (500) made thereat. Said ledges (500) extend from one sidewall (50B1) to the opposite sidewall (50B3) of the groove. Ledges (500) are located in the groove at preset intervals P complying with the condition 1.25≤P≤10L, L is the length of grooves (500) along the groove. Lateral grooves (60) made in the tread side strip extend from the groove to the tread side strip (9). Outlets (60a) are made in the tread side strip. Side grooves extend at the angle to direction twd over the tire (1) tread width on projection on the tire tread surface that makes 15-60 degrees.EFFECT: ruled out tire overheating.7 cl, 20 dwg, 1 tbl

Inflated tyre // 2564462
FIELD: motor vehicle industry.SUBSTANCE: tyre contains tread surface having circle groove going towards along the tyre circle, and multiple grooves in width direction, opened in the circle groove. The grooves in the width direction have the groove width exceeding width of the groove of the circle groove at least at the area opened in the circle groove, and grooves in direction of width go in the direction having inclination relatively to the direction along the tyre circle, where the cavity is made on the wall surface of the groove of the circle groove against the groove in the direction of width.EFFECT: reduced temperature of crown zone of the tyre tread.7 cl, 9 dwg

Pneumatic tyre // 2564064
FIELD: automotive industry.SUBSTANCE: pneumatic tire contains circumferential main and cross grooves and blocks. The blocks comprise a bent groove passing along a tire circumference, separating the block into two parts along the tire width, and arranged so that the directions of bend of bent grooves alternately change to opposite ones. In the first version blocks comprise the bent groove. In the second version the main grooves which pass along the tire circumference, one row which is the central contact section and two contact sections of the left and right arm zones. Cross grooves are inclined cross grooves which pass at the pre-set inclination angle with reference to the direction along the tire circumference. The central contact section is separated into a set of blocks due to crossing of the cross groove.EFFECT: improvement of operational characteristics for snow-covered and wet road movement.22 cl, 6 dwg

Inflated tyre // 2561661
FIELD: motor vehicle industry.SUBSTANCE: treat profile includes first grooves of grouser, that go from the appropriate ends on the external side in the transverse direction of tyre of the first inclined grooves in the first direction in the tyre longitudinal direction, and at angle in the direction of the external side in the tyre transverse direction up to edges of the area of engagement with the pavement, and have angle made with the tyre transverse direction, that is below the angle created with the tyre transverse direction by the first inclined grooves. The second inclined grooves pass from the appropriate ends on the external side in the tyre transverse direction of the first inclined grooves in the first direction in the tyre longitudinal direction, and at angle in the direction of the internal side in the tyre transverse direction. The third inclined grooves pass from the appropriate intermediate points on the first grooves of the grouser in the first direction in the tyre longitudinal direction, and at angle to in the direction of the external side in the tyre transverse direction, and have angle made with the tyre transverse direction exceeding the angle made with the tyre transverse direction by the first grooves of the grouser. Each third inclined groove closes not reaching the other first groove of the grouse, located adjacent with the first groove of the grouser in the first direction.EFFECT: improved operation parameters of the tyre on ice, snow and wet pavement.18 cl, 6 dwg, 3 tbl

Tyre // 2561656
FIELD: motor vehicle industry.SUBSTANCE: tyre has section of the tread for contact with the road surface. In the tread there is section of the side groove in the direction crossing with the circumferential direction of the tyre, and contact section divided by the section of the side groove. The contact section includes: surface of contact with soil to contact with the road surface; side surface made in the direction of the tread width on the external side of the contact section; the side groove surface creating the groove wall of the side groove section, made in the circumferential direction of the tyre at one end of the contact section; and narrowing surface that crosses the surface of contact with soil, side surface and the side groove surface at corner section, formed by the surface of contact with soil, side surface and side groove surface.EFFECT: increased efficiency of heat radiation without losses of the treat strength and its wear resistance.6 cl, 14 dwg, 1 tbl

Pneumatic tire // 2557126
FIELD: transport.SUBSTANCE: tire with preset sense of rotation comprises treads. Parts of said treads are composed by multiple inclined grooves extending from both edges of the tread to its equatorial line and inclined to direction of rotation relative to tread width direction. Tread branched grooves, each extending from the part of inclined groove located some 1/4 of tread width from tread edge and directed inward over tread width. It is directed to tire equatorial line in tire circumference opposite the direction if tire circumference whereat inclined grooves are located relative to tread width to terminate in tread block.EFFECT: higher resistance to abrasive wear.4 cl, 2 dwg, 1 tbl

High-capacity tire // 2550631
FIELD: transport.SUBSTANCE: invention relates to automotive industry. High-capacity tire includes tread provided with central longitudinal groove, crown longitudinal grooves at each side of this groove and crown lateral grooves passing between them thus crating blocks of crown. Crown block is additionally divided in longitudinal direction into two parts of the block by narrow groove of crown. Lateral groove of crown is provided at its bottom with web extending from bottom and connecting two crown blocks being adjacent in longitudinal direction. Lateral grooves of crown are inclined at an angle α of 10 to 30 degrees relative to axial direction of tire. The central longitudinal groove and axially-inner part of lateral crown groove which is located at axially inner side of web are of least depth than longitudinal groove of crown.EFFECT: better tread self-cleaning of stones without creation of cracks at the bottom of groove and without performance degradation on wet road surface.8 cl, 4 dwg, 1 tbl

Pneumatic tire // 2550237
FIELD: transport.SUBSTANCE: invention relates to automotive winter tire tread design. In the tread part, multiple longitudinal and lateral grooves are made. They determine boundaries of multiple rows of blocks. Each of the blocks includes sipes. Length of each of the blocks included into the first row of blocks and the second row of blocks is at least 1.5 times and not more than 2.5 times greater than length of each of the blocks included into the third row of blocks. Width of each of the blocks included into the second row of blocks is greater than width of each of the blocks included into the first row of blocks. Lateral grooves determining boarders of blocks in the first row of blocks and lateral grooves determining boarders of blocks in the second row of blocks are located with shift relative to each other in direction along tire circumference for a distance of at least 0.2 and at most 0.8 of the length of each of the blocks in the first row of blocks. Lateral grooves determining boarders of blocks in the second row of blocks and lateral grooves determining boarders of blocks in the third row of blocks are located so that they communicate with each other being inclined in the same direction relative to tire width direction.EFFECT: improved operational performance during movement over ice and snow with good balance.11 cl, 8 dwg, 1 tbl

Air tire with radial cord // 2550059
FIELD: transport.SUBSTANCE: proposed tire comprises directed patter defining the direction of tire rotation and at least one crosswise groove on tread surface extending from tread edge and inward in direction over tread width beyond central point P of tread width half. Here this tread edge is located whereat groove wall of expulsion side has of at least one crosswise groove has the ledge. The latter extends towards inlet side groove wall relative to point Q. The latter represents the mid distance, over tread width, from tread edge to point P of tread width half. Note here that said ledge extends from position between points P and Q and inward beyond point Q in direction over the tread width.EFFECT: higher resistance to abrasive wear.4 cl, 6 dwg, 1 tbl

Vulcanised tread and tyre // 2539441
FIELD: transport.SUBSTANCE: invention relates to the automotive industry. A tyre frame being a tyre base, and a vulcanised tread which is glued to the tyre frame, are formed separately and connected to each other, forming the tyre. The tread, in its cross (axial) direction, has a set of grooves passing in its longitudinal (circumferential) direction. The tread thickness in the cross section gradually decreases from the equator to the edge from the side of the equator of the extreme external groove located in axial and extreme external area and is gradually increased from the external edge of the extreme external groove outside in the axial direction.EFFECT: possibility of the regulation of uneven wear of the tread.6 cl, 7 dwg

Pneumatic tire // 2537987
FIELD: transport.SUBSTANCE: invention relates to motor tire tread pattern. Tire tread is provided with blocks each one of which has surface of block wall facing transversal groove tilted at an angle (Θ) of 5 to 40 degrees relative to axial tire direction and thus forming acute-angled edge and obtuse-angled edge of block. Block wall surface between acute-angled edge and obtuse-angled edge is provided with at least two slots of 0.3 to 2.0 mm in width. Distance P2 measured from acute-angled edge to one of at least two mentioned slots the nearest to acute-angled edge is greater than distance P1 measured from mentioned obtuse-angled edge to one of at least two mentioned slots the nearest to obtuse-angled edge. Each distance is measured along radially outer edge of block wall surface to slot centre across width.EFFECT: tire noise reduction.10 cl, 5 dwg, 1 tbl

Auto tire // 2531534
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Tire 1 comprises: circular groove 12 made in crown zone, tread runner 22 divided by said groove 12 and crosswise grooves made at tread runner. Crosswise grooves comprises first crosswise groove 32 dividing the tread runner into several blocks and second crosswise groove 51 dividing the block 42 separated by first crosswise groove into block first and second parts 61, 62. Circular groove part depth in contact with second block is smaller than that of circular groove in contact with first block.EFFECT: higher stiffness, better tread drainage.5 cl, 5 dwg, 1 tbl

Winter tire with higher grip at snow-clad surfaces // 2529569
FIELD: transport.SUBSTANCE: invention relates to tread of tires to be used in winter. Winter tire (1) has tread (2) with relied patter composed of multiple lengthwise grooves (4) and crosswise grooves (5) isolating the blocks (6) extending radially from base surface (3) of tread (2) to make at least one lengthwise row. Every block (6) has two lengthwise lateral surfaces (7) that make the boundaries of two appropriate lengthwise grooves (4) and two crosswise side surfaces (8) that make the boundaries of two appropriate crosswise grooves (5). At least one of units (6) has lateral channels (9) each being formed at side surface (7, 8) of appropriate block (6) to extend from base surface (3) of tread (2) to top surface (10) of block (6) to prevent radial extension of trapped snow from inner section of lateral channel (9).EFFECT: perfected grip and snow-clad roads.19 cl, 16 dwg

Pneumatic tire for vehicles // 2526713
FIELD: transport.SUBSTANCE: invention relates to pneumatic tire for vehicles, in particular to be used in winter conditions of driving. Tread is provided with multiple narrow sipes (4) which pass in transversal direction of tread in parallel to each other. Mutually opposite walls (5) of sipes contain mutually matching projections (6, 7) and recesses (16, 17). The projections (6, 7) are rounded raised areas. The projections (6) are located in separate areas in radially outer region of one sipe wall (5). In this structure, each of mentioned projections (6) has one flat side forming supporting surface (6a) oriented in radial direction and essentially perpendicular to sipe wall (5). The projections (7) are located in separate areas in radially inner region of one sipe wall (5). In this structure, each of mentioned projections (7) has one flat side forming supporting surface (7a) passing essentially in parallel to upper surface of positive profile.EFFECT: better tire adhesion to ice-covered road surface while providing uniform wear of tire tread.10 cl, 3 dwg

Pneumatic tire // 2525187
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to studless tire tread pattern. Tire (1) tread (2) has several (5R) crown blocks (5b) separated by crosswise crown grooves (8), two rows (6R) of mid blocks (6b) separated by mid crosswise grooves (9) and two rows (7R) of shoulder blocks (7b) separated by shoulder crosswise groves (10). Every crown crosswise groove (8) is level in lengthwise direction with one crosswise crown mid groove (9) so that crosswise groove (8) is located in area (Mc) of the mid crosswise groove confined by 1st and 2nd crosswise straight lines (Za and Zb). The latter extend through 1st and 2nd extreme ends (9a, 9b) of the mid crosswise groove (9), respectively. Longitudinal length of crosswise mid groove are (Mc) makes at least 25% but not over 50% of pitch length (P) confined by 1st extreme ends (9a, 9b). Are (Mc) of mid crosswise groove does not overlap anyone shoulder crosswise groove (10).EFFECT: better bite.8 cl, 7 dwg, 1 tbl

Pneumatic tire // 2524522
FIELD: transport.SUBSTANCE: invention relates to vehicle tread pattern. Pneumatic tire (1) contains tread (2) which includes projections (23) formed by longitudinal grooves made in longitudinal direction of tire and by transversal grooves (24) crossing longitudinal grooves. The transversal grooves (24) in longitudinal direction of tire form multiple pitches (P1, P2 and P3) of tread pattern. In this structure, in the tread (2) shoulder, as tread pattern pitch decreases the volume ratio of transversal grooves (24) in the volume of portion corresponding to tread pattern pitch increases, and in the central zone of tread (2), as tread pattern pitch decreases the volume ratio of transversal grooves in the volume of portion corresponding to tread pattern pitch decreases.EFFECT: higher stability of vehicle driving while keeping tread uniformity.4 cl, 5 dwg

Tire tread with several wearing plies // 2521899
FIELD: transport.SUBSTANCE: tire tread has at least two wearing plies including outer wearing ply and at least one inner wearing ply located at mid tread under outer wearing ply, and at least one outer groove located in outer wearing ply. Besides, said tread features volumetric cavity ratio of 0.25-0.40 in sound state and of about 0.25-0.40 in worn-out state. External side interacting with ground extends along one of inner wearing ply in worn-out tread. Additionally, said tread features contact surface ratio of 0.66-0.72 in sound state and of about 0.56-0.66 in worn-out state.EFFECT: enhanced performances.15 cl, 19 dwg

Pneumatic tire // 2521052
FIELD: transport.SUBSTANCE: invention relates to tread pattern of automobile non-spiked tire with improved noise characteristics. Pneumatic tire includes axially-internal lengthwise rows of crown blocks which rows are located at each side of tire equator, and axially-external lengthwise rows of shoulder blocks which rows are located axially to the outside of axially-internal lengthwise rows. Crown blocks are longitudinally separated by the first and the second interleaving transverse grooves of the crown. Shoulder blocks are longitudinally separated by the first and the second interleaving transverse shoulder grooves. The first transverse shoulder grooves have width of not less than 3.5 mm. The first transverse crown grooves have width of not less than 2.0 mm. The second transverse shoulder grooves include axially-internal slit-shaped portion with width of 0.5 to 2.0 mm and axially-external main portion at least 3.5 mm wide. The second transverse crown grooves include axially-internal slit-shaped portion with width of 0.5 to 2.0 mm and axially-external main portion at least 2.0 mm wide.EFFECT: better tire noise characteristics without impairment of running characteristics over snow-covered road surface.9 cl, 5 dwg, 1 tbl

Pneumatic tire // 2520265
FIELD: machine building.SUBSTANCE: proposed tire comprises tread zone (A) located from vehicle inner side and tread zone (B) located on vehicle outer side. There are multiple slot-like drain grooves (32A, 32B) extending over tire width and formed in every block (31A, 31B). The number of blocks (31A) in said zone (A) is larger than that of blocks (31B) in said zone (B). Note here that slot-like drain grooves (32B) in blocks (31B) of zone (B) are configured to extend linearly along their depth. Note here that slot-like drain grooves (32A) in blocks (31A) of zone (A) are configured to extend in wavy manner along their depth.EFFECT: better road grip on dry road and snow.7 cl, 4 dwg

Pneumatic tire // 2519327
FIELD: transport.SUBSTANCE: method is executed by means of making multiple wave-shaped grooves (20) in central belt (16) of tread between two ring grooves (14) located with tilt relative to equatorial plane of tire and consisting of central small elements (26) equatorial plane CL and side small elements (28) at two sides of this equatorial plane. In each of side small elements (28), the second transversal groove (40) is made containing wide area (42) and narrow area (44). Reducing fragmentation of rubber and cracking in side small elements (28) is achieved due to formation of area (54) with raised bottom on periphery of the first acute-angled area (50) and formation of the first bevelled area (56A) on sharp end of the first acute-angled area (50).EFFECT: lower noise level, rubber fragmentation and cracking in tread elements, higher dewatering capability.4 cl, 3 tbl, 13 dwg

Pneumatic tire tread // 2515621
FIELD: transport.SUBSTANCE: tread contains multiple grooved obstructing elements (4) which are formed by and located in circular grooves (2). Herewith, obstructing elements (4) go from bottom (21) of circular groove (2) and blocks at least 70% of cross-section area of circular groove (2). Bending parameter of grooved obstructing elements (4) is determined as E·I/(h3l), where E is module at 10% elongation of material used for grooved obstructing elements, I is inertia moment of grooved obstructing element cross-section, h is height of grooved obstructing element, and l is width of grooved obstructing element, and ranges from 250 Pa to 350 Pa.EFFECT: providing grooved obstructing elements wear to degree equivalent to tread section wear degree while reducing noise caused by resonance of air columns and maintaining retraction characteristics.6 cl, 6 dwg, 1 tbl

Pneumatic tire // 2513210
FIELD: transport.SUBSTANCE: invention relates to tread pattern of tire designed to be used on dry road, ice- and snow-covered roads. Proposed tire comprises unidirectional tread pattern including right and left lengthwise grooves of the crown and crow rib arranged there between. Crown rib has first and second V-like grooves arranged by turns in the tire lengthwise direction. First V-like grooves extend from the left lengthwise groove of the crown. Second V-like grooves extend from the right lengthwise groove of the crown. First and second V-like grooves terminate nearby the rib while their V-like configurations have inflections located, in fact, at tire equator.EFFECT: stable motion on dry road, ice- and snow-covered roads.9 cl, 10 dwg, 1 tbl

Air tire with tread asymmetric pattern // 2508994
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Tire features tread asymmetric patter wherein ratio of actual area of contact to total area for zone 2o of outer side is larger than that for inner side zone 2i but with minor difference characteristic of water removal for right and left wheel tires. Said tire has tread surface 2 divided by four lengthwise grooves 3 and 4 into central area 5 of contact with soil, mid areas 6,6 of contact with soil and shoulder areas 7,7 of contact with soil. Said mid area 6o and shoulder area 7o in outer side zone 2o are divided by outer mid transverse grooves 8o and outer shoulder transverse grooves 10o into blocks 9o and blocks 11o. Mid transverse grooves 8o are inclined in opposite direction to inclination of shoulder transverse grooves 10o relative to tire axial direction while transverse grooves 8o and 10o are inclined at angle θmo of 5-45° and at angle θso over 0° and not over 40°, respectively.EFFECT: better stability in rainy and dry weather.8 cl, 6 dwg, 1 tbl

Tire tread with dents // 2508205
FIELD: transport.SUBSTANCE: tread comprises multiple raised elements 10 confined by cutouts. At least one of said raised elements 10 has dents 2 of maximum depth H not larger than tread thickness. This dent is located in major direction confined by the dent track ends on new tread and in minor direction extending in tread depth. Dent 2 has first part 21 and second part 22. Dent first part 21 extends in minor direction between contact side 15 in new state and depth H1 equal to, at least, 40% of maximum depth H while second part 22 extends the first part 21 in tread depth. Note here that said second part 22 extends to depth H2. Dent second part 22 in major direction has at least one first section 221 and one second section 222.EFFECT: improved performances.10 cl, 7 dwg

Pneumatic tire with slitted drain grooves // 2508204
FIELD: transport.SUBSTANCE: tread 2 has rounded shoulders and is divided by the main lengthwise grooves 3 and crosswise grooves 4 in blocks 5 furnished with pockets 6, each having zigzag part 8. Lengthwise grooves 3 include at least two axially outer lengthwise grooves 3o dividing the tread 2 into shoulders Ysh and crowns Ycr wherein zigzag part 8 of pockets 6sh in shoulders Ysh features larger zigzag amplitude Wsh and larger zigzag pitch Psh that zigzag amplitude Wcr and zigzag pitch Wcr of zigzag part 8 of pockets 6cr in crowns Ycr. Inclination angle θsh of pockets 6sh relative to axial direction is smaller than angle θcr.EFFECT: improved flotation at dry road at minimum deterioration of performances on snow-covered road.7 cl, 7 dwg, 1 tbl

Air tire (versions) // 2506171
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern of stud-free tire. One block of air tire has first and second slitted drain grooves. Every said groove extends in tire width direction. Said grooves are regularly spaced apart in tire circumference. First and second said grooves has first parts of slitted rain groove that features linear shape if seen in the plane. The slitted drain groove second part that features zigzag shape if seen in the plane and is connected with slitted drain groove first part. First part of slitted drain groove has two surfaces of slitted and opposed drain groove walls if seen in direction perpendicular to the length of said slitted drain groove. Said first part comprises the ledge arranged on first surface of said walls and recess arranged second surface of said walls to make recess connected with ledge.EFFECT: better running on ice and snow.20 cl, 20 dwg, 1 tbl

Pneumatic tire // 2506170
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern of stud-free tire. Proposed tire comprises sets of blocks G composed of polygonal blocks 10 arranged tightly in crown zone 1. Polygonal blocks 10 are confined by grooves 9 including first grooves 9a of W9a width and arranged between polygonal blocks 10 adjoining in tore circular direction. Width W9a of first grooves 9a is larger than width W9b of second grooves 9b located between polygonal blocks 10, adjoining and staggered.EFFECT: better flotation on ice and snow.7 cl, 7 dwg, 4 tbl

Pneumatic tire // 2504483
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Proposed tread pattern comprises multiple screw transverse grooves with their open ends communicated with one of two circular grooves and their extremities terminate in tread section confined on sides by circular grooves. Every skew transverse groove extends from its open end in first direction in tire circumferential line. Tread patter includes also narrow grooves with their starting parts located in the midst of appropriate skew transverse grooves. Every narrow groove extends in second direction opposite the first one to terminate at tread section. Curved and straight parts are located between open end and extremity nearby each skew transverse groove. Said extremity relates to groove straight part extending in tire circumferential direction. Closed end of narrow groove is shifted in second direction in circumferential direction relative to extremity of skew transverse groove extending there along in second direction.EFFECT: optimised tire performances at wet road coat, higher wear resistance.18 cl, 10 tbl, 7 dwg

Tire tread protector // 2502609
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to large truck tire tread. Tire has tread 1 with absolutely new running surface 10 with at least one running path 2 confined by sidewalls located opposite each other. This running part 2 opens discretely to running surface 10 by multiple parts 21 opened outward of the tread. Note here that said open parts 21 have two ends 212 extending under running surface by channels 22 having inlets 221, 222 connected with ends 212 of said open parts 21. Said inlets 221, 222 feature mean area S. Tread is made so that every part 21 opened to sunning surface has closer 4 at every its end to close cross-section of channel inlets 221, 222 in motion and keep passage open.EFFECT: better braking performances.10 cl, 10 dwg

Tire with low resistance to rolling // 2502608
FIELD: transport.SUBSTANCE: invention relates to automotive industry, particularly, to passenger car tire tread patters. Tire tread has grooves 2 directed in circle to confine sets of raised elements that make two edge rows. Edge rows have multiple transverse grooves of definite depth and confined by opposite walls. Multiple transverse grooves of one end row include at least one support block 5 extending from at least one wall to confine said groove. Every support block 5 has active surface 50 to contact with other surface in contact with soil surface. Tread features preset relationships for the sum of areas of active surfaces 50 at maximum length LM in crosswise direction of virtual convex surface surrounding all active surfaces of transverse groove. Besides, it has at least one fluid flow channel between every support block and groove bottom.EFFECT: better operating performance on wet roads.8 cl, 8 dwg

Tire with improved rolling characteristics // 2502607
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Tread has H-deep grooves exposed at tread surface and confined by material surfaces spaced at least 2 mm apart. Multiple grooves 2 have at least one shaped ledge 6 at, at least one of said opposed surfaces. Said shaped ledge is confined by radially outward and radially inward surfaces. Said radially outward surface is located closer to tread surface 10 than radially inward surface. Inner and outer surfaces cross at points A1, A2 of the ledge distant from each other in groove direction. Note here that every of said surfaces of every ledge, radially inner and outer, features such profile in section parallel with confining surfaces that radially outward surface profile length is larger than that of radially inward surface.EFFECT: better performances in rainy weather.5 cl, 6 dwg

Tire tread with perfected noise killer // 2499679
FIELD: transport.SUBSTANCE: invention relates to automotive industry, particularly, to tire tread with flexible device to decreased noises related with resonance of air flowing along tire grooves all over tire circumference. Tire tread 1 is made from rubber with Shore hardness of at least 65. Said tread has at least one groove of width W and depth D. Said groove 2 is confined by two opposite tread parts connected by groove bottom 21. tread comprises multiple closing membranes 4 formed in at least one groove 2. Every closing membrane 4 closed groove 2 at, at least, 50% of groove cross-section. Note here that every closing membrane 7 has mean thickness not over 2 mm and can bend at fluid passage. Closing membranes 4 are made of material with Shore hardness of not over 62. Note here that said hardness is smaller than that of the tread.EFFECT: decreased resonance noises.8 cl, 7 dwg

Pneumatic tire // 2489267
FIELD: transport.SUBSTANCE: invention relates to automotive industry, namely, to tread pattern. Propose tire comprises side strips and tread section there between. Two peripheral zigzag-like main grooves extend along tire circle in every zone from tire axial line in tread region. First transverse grooves extend from main inner peripheral groove to pattern end. Second transverse grooves extend to pattern end from outer peripheral main groove. Inner peripheral main groove wall has surface with inclination varying in circle. Outer block located between main grooves has traverse cutout-like groove extending in tire width or from inner, or from outer main groove and closed within outer block. Depth of transverse cut-out groove is smaller than that of the first and second transverse grooves.EFFECT: higher braking properties on snowy and wet pavement.20 cl, 7 dwg, 1 tbl
 
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