Characterised by the use of narrow slits or incisions, e.g. sipes (B60C11/12)

Pneumatic tyre // 2628551
FIELD: automotive engineering.SUBSTANCE: tire tread has a ribbed pattern that includes at least four major grooves (11, 12) and at least five rows of contact areas (10, 20, 30). A plurality of curved grooves (21), each having a curved shape, are formed on an intermediate contact area (20) located on the inside of each main groove (12) of the shoulder region. Each of the curved grooves (21) has one end part opening to the main groove (12) of the shoulder region and the other end part closed on the intermediate contact area (20). Each of the curved grooves (21) consists of the first inclined area of the groove extending from the open end part to the curved part and the second inclined area of the groove extending from the curved part to the closed end part. The direction oriented from the open end part of the first inclined area of the groove to the curved part coincides with the rotation direction (R) and the second inclined area of the groove is bent towards the first inclined area of the groove. The curved part serves as a vertex.EFFECT: uneven wear of the tire is suppressed while driving along a circular path and the increase in noise after wear is prevented.13 cl, 6 dwg, 1 tbl

Tire // 2626446
FIELD: automotive industry.SUBSTANCE: on protector (2), a plurality of blocks (70A, 70B, 70C) is arranged separated by circumferential grooves (50) extending in the circumferential direction (L) of the tire and lateral grooves (60) extending in the direction (W) of the tire width. Width (W2) of protector (2) in the direction (W) along the tire width is from 60 to 95% of width (W1) of tire (1) in the direction indicated. The slots location density in central blocks (70A) is more than the slot location density in blocks (70B, 70C) remote from the central blocks in the direction (W) along the tire width.EFFECT: improved wear characteristics and tire protector rolling with preservation of normal performance on ice.14 cl, 3 dwg, 2 tbl

Tire protector and production method // 2626426
FIELD: automotive industry.SUBSTANCE: tire protector (110) comprises a plurality of ribs (122-126) or blocks, a plurality of grooves (142, 144, 146, 148) and a plurality of slots. Each of ribs (122-126) has a length in the circumferential direction, a width in the axial direction; and a radial depth. A plurality of grooves (142, 144, 146, 148) are set by adjacent ribs (122-126) or blocks. A plurality of ribs (122-126), each of which is disposed between two grooves of the plurality of grooves (142, 144, 146, 148) defines a plurality of central ribs (123, 124, 125). A plurality of slots (150) formed in each of central rib (123, 124, 125). Each of slots (150) extends along central ribs (123, 124, 125) without contacting grooves (142, 144, 146, 148), each of slots (150) is straight and angular to the axial direction, where the angle of each slot (150) refers to either the first plurality of angles, where all angles are equal to or more than 0 degrees, and do not exceed 70 degrees; or to the second plurality of angles, where all angles are equal to or more than -70 degrees, and do not exceed 0 degrees. Each slot (150) has a thickness which does not exceed 2.00 mm. Each slot (150) is spaced in the circumferential direction from the adjacent slot to a certain interval of a certain length that does not exceed 20 mm. The interval length ratio to the length of the tire contact area with the support surface that is formed after applying the standard load to the tire with a standard internal pressure is less than 0.062.EFFECT: reduced protector wear rate or improved performance of the clutch force.28 cl, 7 dwg, 1 tbl

Tire with slot of essentially helicoid shape // 2623338
FIELD: automotive industry.SUBSTANCE: tire comprises an annular protector having a protector element located thereon. The protector element includes an upper surface that forms the first plane. The tire further comprises, at least, one slot of substantially helicoid shape, located in the protector element, which is formed by the hole in the upper surface extending in the first direction in the first plane, when the tire is new, and is further formed with a base extending in the second direction in the second plane parallel to the first plane. The second direction is located at the angle of 45 to 135° against the first direction.EFFECT: optimized determination of the tire protector wear.14 cl, 15 dwg

Tyre for motorcycles // 2621528
FIELD: transportation.SUBSTANCE: invention relates to tyres intended to be mounted on the wheels of motorcycles with medium/large engine displacement (e.g., 600 cm3 or more) and/or high power (for example, 130-140 h.p. or more). The tyre (100) for the motorcycle has a tread band (8) comprising the central annular portion (A) and two arm circumferential portions (B). The portion (A) has a width (M) not exceeding 65% of the band (8) width in the axial direction, and each arm circumferential portion (B) has a width (N) not exceeding 45% of the band (8) width in the axial direction. The band (8) comprises a plurality of grooves and slit-like drainage grooves made with the possibility to form the tread pattern. The portion (A) comprises at least two substantially longitudinal first grooves (18, 19) opposed to each other with respect to the plane (X-X) of the tyre. The first substantially longitudinal grooves (18, 19) extend substantially in the portion (A) and at least partially facing each other so as to limit a part of the tread band in the axial direction, at least partially; the void ratio defined by the slit-like drainage grooves of the portion (A) is less than the void ratio defined by the slit-like drainage grooves of the portion (B).EFFECT: providing the possibility of using the tyre substantially all the year round; the tyre must be able to ensure good grip with the road at low temperature conditions as well, to have the high reliability on wet grounds and at the same time to provide the possibility of achieving the performance characteristics comparable to the performance of typical summer tyres in terms of responsiveness and drivability, steerability, and also in case of the sports driving style without compromising the security.25 cl, 5 dwg

Tyre for motorcycles // 2617894
FIELD: transportation.SUBSTANCE: invention relates to tyres intended to be mounted on the wheels of motorcycles with medium/large engine displacement (eg, 600 cm3 or more) and/or high power (for example, 130-140 h.p. or more). The tyre (100) for the motorcycles has a tread band (8) comprising the central annular portion (A) symmetrically disposed on either side of the equatorial plane (X-X), and two arm circumferential portions (B) located on the sides opposite in the axial direction relative to the central annular portion (A). The portion (A) has a length (M) in the axial direction, not exceeding 65% of the band (8) scan in the axial direction. Each portion (B) has a length (N) in the axial direction, not exceeding 45% of the band (8) scan in the axial direction. The band (8) comprises a plurality of grooves and slit-like drainage grooves made with the possibility to form the tread pattern. The portion (A) comprises at least two substantially longitudinal first grooves (18, 19) opposed to each other with respect to the plane (X-X) of the tyre. The portion (A) comprises at least one first slit-like drainage groove (20) and the second slit-like drainage groove (22), following one another in the circumferential direction, of which at least one is inclined relative to the plane (X-X) of the tire so as to form an angle α<60°.EFFECT: providing the opportunity for a greater print area and, consequently, a greater adhesion to the soil and providing the safety of driving in cold areas or on slippery roads typical for the winter season, as well as adjusting for use for sport riding on motorcycles with the medium and large engine displacement.26 cl, 5 dwg

Tire tread with material gripping (versions) // 2613120
FIELD: manufacturing technology.SUBSTANCE: invention relates, substantially, to tire tread. More specifically, object of present invention relates to tire or tire tread, containing element with material gripping. Tire has radial direction, axial direction, direction along circumference and tire grouser (220), wherein grouser (220) is limited by plurality of surfaces (230). Plurality of surfaces (230) comprises upper surface (232), which passes in axial direction and in direction along circumference, first side surface (233) and second side surface (234). First side surface (233) is oriented at first angle (φ) to upper surface (232), wherein first angle (φ) ranges from 100 to 150 degrees. First side surface (233) contains first side surface first cavity (242) and has height (H1) and width. First cavity (242) represents elongated rectangular slot forming first elongation axis. First cavity (242) has lateral cross section perpendicular to first elongation axis, which is, essentially, semicircular, semioval, semi-elliptical, parabolic or hyperbolic. First cavity (242) has length from 30 % to 120 %, inclusive, of first side surface (233) width. Second side surface (234) is oriented at second angle (ψ) to upper surface (232), wherein second angle varies from 100 to 150 degrees. Second side surface (234) contains second side surface (234) first cavity (252), and has height (H2) and width. Second side surface (234) first cavity (252) represents elongated rectangular slot, forming second elongation axis. First cavity (252) has lateral cross section perpendicular to second elongation axis, which is, essentially, semicircular, semioval, semi-elliptical, parabolic or hyperbolic. First cavity (252) has length from 30 % to 120 %, inclusive, of second side surface (234) width.EFFECT: creation of tire tread, which is made with possibility to grip significant amount of road bed material by tire tread.5 cl, 11 dwg

Pneumatic tire // 2610737
FIELD: transportation.SUBSTANCE: longitudinal narrow grooves (16) are placed with density of at least 0.06 groove/mm and not more than 0.2 groove/mm in transverse direction of the tire. Narrow grooves (20) in the transverse direction stretch at the angle of at least -45° and not more than +45° in respect to the transverse direction of the tire. Longitudinal narrow grooves (16) have at least one bent section. Angle of bent section bending is at least 40° and not more than 160°.EFFECT: improved characteristics of braking and turning on ice.17 cl, 6 dwg, 1 tbl

Pneumatic tire // 2610736
FIELD: transportation.SUBSTANCE: longitudinal narrow grooves (18) are placed with density of placement in transverse direction of the tire from 0.06 groove/mm to 0.2 groove/mm. Narrow grooves (22) have at least one bent section in the transverse direction. Angle of bent section bending is at least 40° and not more than 160°.EFFECT: improved characteristics of braking on ice, snow and water drainage.11 cl, 5 dwg, 1 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 // 2607491
FIELD: machine building.SUBSTANCE: invention relates to automotive industry, in particular, to a winter tire tread pattern. Pneumatic tire comprises annular grooves, multiple transverse grooves and longitudinal grooves, communicating between transverse grooves on outer side of the annular grooves in a tire width direction. Each transverse groove includes the first part of the transverse groove, the second part of the transverse groove located farther outward in a tire width direction than the first part of the transverse groove, and a transition part of the transverse groove connecting the first and the second parts of of the transverse groove. Centre of the groove in width of the outer end in a tire width direction, the first part of the transverse groove is located closer to one peripheral side of the tire, than the centre of the groove in width of the inner end in a tire width direction, the second part of the transverse groove. Longitudinal grooves are inclined relative to tire circumferential direction to the opposite side, on which a transition part of the transverse groove passes. End on one circumferential side of the tire of each longitudinal groove is connected with a section, where the second part and the transition part of the transverse groove on one peripheral side of the tire are connected together. End on the other circumferential side of the tire of each longitudinal groove is connected with a section, where the first part and the transition part of the transverse groove on the other peripheral side of the tire are connected together.EFFECT: technical result is improvement of drainage characteristics at good operational features on snowy and icy roads.5 cl, 3 dwg

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

Tread comprising inclined units // 2603880
FIELD: motor vehicle industry.SUBSTANCE: invention relates to automotive industry, particularly, to winter tire tread. Tread comprises plurality of units (3) with height H. Each unit has contact surface (7) intended for contact with road during pneumatic tire movement, and at least side surface (5a, 5b). This side surface is coated with covering material layer (10), at least, on 50 % of surface. Unit comprises attack zone, intended for implementation of primary contact with road during pneumatic tire movement. This unit (3) has inclined direction of extension (J), so that attack zone of this unit is angle of attack (9). Besides, unit (3) contains part (11), not coated with coating material, wherein said coating material has modulus of elasticity, which exceeds unit forming rubber material modulus of elasticity, and this uncovered part (11) stretches from angle of attack, at least for 1/3 of unit height H.EFFECT: better tire adhesion on snow-covered road at reduction of noise.4 cl, 5 dwg

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

Pneumatic tyre // 2601504
FIELD: manufacturing technology.SUBSTANCE: invention relates to a pneumatic tyre with a slot (narrow groove) made inside a unit. Pneumatic tyre comprises a unit, divided by multiple annular grooves running along circumferential direction of tyre, and multiple grouser grooves passing diagonally relative to tyre circumferential direction and equipped with two or more curved sections. Tyre also comprises an inclined narrow groove, which divides unit, passes diagonally relative to tyre circumferential direction and parallel to said grouser grooves. Inclined narrow groove is provided with two or more curved sections inside one unit.EFFECT: improved tyre performance when moving on ice, preventing formation of a water film and local wear.8 cl, 11 dwg, 1 tbl

Tire tread for movement on snow containing grooves and cavities // 2600961
FIELD: manufacturing technology.SUBSTANCE: tread comprises multiple blocks (2) divided by grooves (3). Blocks (2) are made with fissures (5), which are slit-like drain grooves split into several parts from a certain depth and further referred to as complex slitted drain grooves. Each complex slitted drain groove (5) has, if observed in the cross section, straight first part (9) passing in the radial direction from the tread surface and second part (11), which is a continuation of the first part and has at least two branches (13), each of which has end (15). Tread comprises extra cavities (17), and each cavity extends between branches (13) of a complex slitted drain groove. Each cavity comprises bottom (19) located at the same level that ends (15) of the branches. Cavities (17) and grooves (3) of the tread are made with such a configuration that the said tread has a share of the voids surface in the end of the wear exceeding or equal to 35 %. Besides, distance (D) between two branches (13) of two adjacent complex slitted drain grooves (5) is equal to at least 2 mm.EFFECT: better grip on snow including the one at the end of the tires service life while maintaining or even increasing their total mechanical strength.7 cl, 10 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

Pneumatic tyre // 2596646
FIELD: machine building.SUBSTANCE: invention relates to automotive industry, particularly discloses a winter tyre tread. Tyre tread comprises area of contact with soil, separated by at least two longitudinal grooves extending continuously in tyre lengthwise direction, transversal grooves crossing lengthwise groove to form a row of blocks containing units arranged in tyre lengthwise direction. At least one unit contains at least two segments extending in tyre axial direction and separating unit at least into three parts, including outer and inner part, where total axial length of all segments is from 100 to 400 size of width of tyre tread. Outer part has is longer than inner part, and ratio of the longitudinal length of outer part to longitudinal length of inner part is more than 1.0, but less than 3.0.EFFECT: technical result is improved resistance to uneven wear of tyre tread with preservation of running characteristics on icy roads.8 cl, 6 dwg, 1 tbl

Pneumatic tyre // 2596390
FIELD: machine building.SUBSTANCE: invention relates to machine building, particularly, to tires. Pneumatic tire comprises central rib formed by two main lengthwise grooves. In central rib, there are two skewed grooves: main and auxiliary. Multiple main skewed grooves and multiple auxiliary skewed grooves are located next to each other in tire lengthwise direction. Front ends of main skewed grooves extend beyond tire equatorial tire plane, are connected to each other and form zigzag central groove. Width of the central groove is not less than 2 mm and no more than 6 mm.EFFECT: improved operating performances of tire in winter conditions.19 cl, 3 dwg

Pneumatic tyre // 2593165
FIELD: motor industry. SUBSTANCE: invention relates to tyre tread pattern for wet and snow-covered road surface. Tyre includes a tread, a pair of central longitudinal main grooves extending on both sides of tread of tyre equatorial plane, central region of ground contact between central longitudinal main grooves, lamella, provided in a central area of contact with ground, V-shaped grooves, each of which has a vertex positioned in middle of central zone of contact area with ground, a first inclined portion extending from top of one edge of central region of contact with ground, and a second inclined portion extending from vertex to other edge of central region of contact with ground. Width of central region of ground contact is from 15 to 21 % of tread width. EFFECT: better performance on wet and snow-covered road surface. 5 cl, 3 dwg, 1 tbl

Pneumatic tyre tread // 2589531
FIELD: machine building.SUBSTANCE: invention relates to machine building, particularly, to pneumatic tire tread. Pneumatic tire tread comprises circular ribs consisting of draughts elements with slit-like cutouts. At depth of slot-like cut each surface consists of two sections. First is wavy, and second is flat. On flat sections of opposite surfaces of slit is made in one row of lateral ledges and mating recess with gap between each other.EFFECT: better moisture removal from contact spot.9 cl, 8 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 // 2588329
FIELD: machine building.SUBSTANCE: invention relates to machine building, particularly, to tires. Pneumatic tire comprises tread with web sections, each having a slot-like groove. Slot-like groove includes perpendicular section and section of bend, bending along perpendicular section in direction perpendicular to one side, and then to other. Bending section includes in direction on depth first point of additional bend, main point of curvature and second point of additional bend. First and second inclined sections have areas and ratio between their areas and projection area for slot-like grooves. Ratio for first and second inclined sections are not less than 0.1.EFFECT: better braking characteristics due to suppression of deformation of sections of links and improvement of properties of landing on ground is achieved.10 cl, 10 dwg, 12 tbl

Pneumatic tyre // 2585196
FIELD: machine building.SUBSTANCE: invention relates to automotive industry. Pneumatic tire comprises multiple units, separated by circular grooves and side grooves and multiple slot-like drain grooves running along tire width and made in each block. At least some of slot-like drain grooves have main part located in centre of unit in direction of tire width and made with deep bottom connected part, which is connected with circumferential groove, adjacent to such unit, and has depth making at least 50 % of depth of circular groove, and mutually mating convex and concave parts are locally on two opposite surfaces provided with deep bottom connected part of slot-like drain groove.EFFECT: technical result is better grip on ice, wet road, without reducing stability at steering on dry road surfaces.6 cl, 9 dwg, 1 tbl

Pneumatic tyre // 2585194
FIELD: motor industry.SUBSTANCE: invention relates to tire tread design intended for movement over ice and snow. Tyre (1) is made with multiple circular main grooves (21, 22) passing in direction along tire circumference and multiple contact sections (31, 32), separated by circular main grooves (21, 22). Contact areas (31, 32) are made with multiple auxiliary sipes (52). When viewing tread auxiliary sipes (52) have curved shape, formed by connection of first bent sections (521) and second curved sections (522). Depth (Dg) of grooves, which have circular main grooves (21, 22), and depth (Ds_1) slot-like drain grooves, which have first curved sections (521), and depth (Ds_2) slot-like drain grooves, which have the second curved sections (522) auxiliary Sipes (52), have ratio of 0.5≤s_1/Dg≤1.0 and 0.2≤Ds_2/Ds_1≤0.5.EFFECT: improved braking performance of tyre on ice and improving driving stability on snow when moving.21 cl, 19 dwg, 1 tbl

Pneumatic tire // 2581978
FIELD: motor car construction.SUBSTANCE: tire tread comprises one or several main grooves extending in the tire circumference and multiple side grooves extending in the tire width between the main grooves and/or between the main groove and the tread end. Note here that the main grooves and side grooves define the number of units with at least one narrow cutout in every said unit. Every unit has the first cut out groove with one end exposed to side groove located at one side of the unit in the tire circumference and the other end terminated inside the unit. The second cut put groove has its one end exposed to the side groove arranged at the unit opposite side in the tire circumference. The opposite end terminates inside the unit. There is the connection narrow groove in width smaller than that of the first and second cut out grooves to connect the both said first and second grooves.EFFECT: better performances on ice.7 cl, 5 dwg, 1 tbl

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

Pneumatic tire // 2577422
FIELD: motor car construction.SUBSTANCE: claimed tire comprises extending section (2) at the tread section. Said extending section (2) has the cutout (5) with amplitude in direction of tire circumference extending toward the tire width. Cutout (5) arranged in the depth direction extends from surface (S) toward the inner side in radial direction of the tire. It comprises the section (5a1) located from the side of extending section curved from its surface in direction of tire circumference. Section (5a2) is located from the extending section bottom side curved in direction other than that of section (5a1). The section (5a2) located from the extending section surface or curved in tire circumference direction with the shift other than that of section (5a1) located from the extending section surface. The shift of cutout section located from the extending section bottom side curved in direction of tire circumference is larger than that of the section located from the extending section surface in direction of tire circumference.EFFECT: reliable grip on ice, dry and wet surfaces.11 cl, 3 tbl, 27 dwg

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

Heavy-duty pneumatic tire // 2574874
FIELD: transportation.SUBSTANCE: invention relates to automotive industry. The tire includes the protector fitted with the main grooves continuous in the longitudinal direction and cross grooves with formation of blocks in longitudinal rows. The main grooves include a pair of main shoulder grooves each of them is located from each side from the tire equator so their central line is located at the distance from 0.30 to 0.65 of the half of width of the protector from the tire equator. Blocks comprise the crown blocks located near the protector crown between the main shoulder grooves and the shoulder blocks located in shoulder areas axially outside from the main shoulder grooves. Each of crown blocks and shoulder blocks is fitted at least with one lamel passing in the axial direction.EFFECT: improvement of running characteristics of the tire on the ice-covered road.11 cl, 6 dwg, 1 tbl

Radial pneumatic tire for passenger vehicle and method of its operation // 2568521
FIELD: motor car construction.SUBSTANCE: tire tread surface in contact with the soil has at least one major groove (2a) extending along the tread, or the major groove (2a) and minor groove (2b) that differs from said major groove (2a. It has also the auxiliary groove, its width making ≤2 mm in the area across the tread width while the ratio of the negative area of major groove (2a) varies from 12% to 20%.EFFECT: better grip on dry and wet surface.13 cl, 10 dwg, 5 tbl

Air tire // 2566517
FIELD: transport.SUBSTANCE: invention relates to tread of tires to be used in winter. Tread comprises tread band with multiple grooves, blocks and complex-shape segments. Segment complex shape is defined by first ledge with top (21) at depth (P1) from tread surface. Top (21) is connected with the segment support surface (X) by first connection surface (22) facing the segment radial outer side and second connection surface (23) facing the segment inner radial side. First connection surface (22) is inclined relative said bearing surface at angle (A) of 50 to 90 degrees while second connection surface is inclined to bearing surface at angle (B) of 0 to 50 degrees.EFFECT: better grip on dry, wet and snowy surface.31 cl, 4 dwg, 1 tbl, 1 ex

Pneumatic tire // 2566514
FIELD: motor car construction.SUBSTANCE: shoulder contact section (13S) has the first crosswise groove (14A) that communicates at one end part with the major groove (12) on the side most remote from the centre in the tire width direction and does not communicate with the opposite end part with the tread end (E). Its second crosswise groove (14B) does not communicate at one end part with the major groove (12) on the side most remote from the centre in the tire width direction and communicates with the opposite end part with the tread end (E). The first crosswise groove (14A) and second crosswise groove (14B) alternate in the tire circumference so that their end parts have permissible overlap (S) in the tire width direction. Besides, knife cut (15) is composed between the other end part of the first crosswise groove (14A) and tread end (E).EFFECT: noiseless work, better stability owing to better water removal.11 cl, 5 dwg, 1 tbl

Pneumatic tire // 2562260
FIELD: transport.SUBSTANCE: invention relates to motor tire tread pattern. Tread is provided with: a pair of longitudinal grooves (3) of crown passing on both sides of centre line (C) of tire, crown rib (5) between longitudinal grooves (3) of crown, a pair of shoulder longitudinal grooves (4) passing between crown longitudinal grooves (3) and edges (2t) of tread contact with ground, middle ribs (6) between crown longitudinal grooves (3) and shoulder longitudinal grooves (4), and shoulder ribs (7) between shoulder longitudinal grooves (4) and edges (2t) of tread contact with ground. Volume fraction Rc of grooves which represents total volume of grooves and lamellas to crown rib (5) volume ratio, volume fraction Rm of grooves relative to middle ribs (6) and volume fraction Rs of grooves relative to shoulder ribs (7) satisfy relation Rc ≤ Rm ≤ Rs.EFFECT: better driving stability due to increased cornering power in the whole range of loads including low loads range.10 cl, 6 dwg, 1 tbl

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

Tire tread with better grip of snow or dry road pavement // 2561179
FIELD: transport.SUBSTANCE: tire tread has one or several reiterating spacings. Note here that every reiterating spacing comprises separate spacing with tread units including grooves formed in said tread. Note here that every spacing features length of 15-35 mm. Said treads can have weighted mean density of grooves Dw of 10 mm-1 to 37 mm-1. Tread units are also made of rubber mix based on diene elastomer, plasticizing system and cross-linking system. Said rubber mix features vitrification point of -40°C to -15°C. Note also that Coulomb modulus G* measured at 60°C at 0.5-1.1 MPa.EFFECT: better tread braking on snowy and dry pavement.20 cl, 4 dwg, 3 tbl

Tire with tread having improved adhesion with snow and dry pavement // 2561149
FIELD: motor vehicle industry.SUBSTANCE: tire has tread with maximum density of narrow slots in the contact patch, minimum density for side grooves in the contact patch, and minimum longitudinal ratio of contact surface. Under definite options of the implementation the length of steps or repeating blocks of the tread geometry along the circular direction of the tire is within range of the definite span, and depth of the tread pattern is below the specified value.EFFECT: improved characteristics of the tire adhesion with snow and dry pavement.15 cl, 22 dwg, 7 tbl

High-capacity tire // 2551699
FIELD: transport.SUBSTANCE: invention relates to vehicle tire tread design. High-capacity tire includes tread provided with four or five longitudinal grooves so that in axial direction they divide the tread into five or six ribs. Five or six ribs include a pair of ribs of shoulder area each one of which is provided with shoulder lateral groove, and three or four ribs of crown area each one of which is provided with lateral grooves of crown. Lateral grooves of crown pass throughout the crown area rib width. Shoulder lateral grooves pass axially outwards from axially-inner edge of shoulder area rib so that they end at axial distance of 78 to 88% of shoulder area rib axial width from the mentioned axially-inner edge. Depth of longitudinal grooves is 15 to 20 mm. Depth of lateral grooves of crown is 9 to 30% of longitudinal grooves depth. Depth of shoulder lateral grooves is 9 to 25% of longitudinal grooves depth. Tread width TW is 0.78 to 0.87 of tire cross-section width SW.EFFECT: improved resistance to shoulder tire wear, as well as improved running characteristics of tire on wt road surface.6 cl, 6 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

High-capacity tire // 2541553
FIELD: transport.SUBSTANCE: invention relates to automotive industry, particularly, to high-capacity tires. Tire comprises tread with blocs each being provided with zigzag-like blade made at the surface of contact with soil. Relationship between bloc length A measured in straight line crossing the centre of gravity of said contact surface and bloc maximum width (B) making the axial spacing between the most remote edges of said contact surface varies from 0.8 to 1.7. Said zigzag blade is located at central area extending from the centre of gravity of said contact surface on both sides of lengthwise direction through 25% of block length (A). Said zigzag-blade consists of two straight larger length sections extending axially inward from both sides of the blocs in the tire axial direction. Besides, it includes straight section of smaller length extending between inner ends of said larger-length sections so that lengthwise spacing between said most remote ends of said blade varies from 10 to 35% of bloc length (A).EFFECT: reduced stepwise wear at sufficient road grip.8 cl, 6 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

Winter tire // 2531435
FIELD: transport.SUBSTANCE: invention relates to winter tire. Tire (1) comprises multiple blocks (6a, 6b), at least one slit-like retaining-type drain groove (6a, 6b) extending in at least one block of said set in, in fact, axial direction (X) defined at said tread band. Said first slit-like retaining-type drain groove is configured to make between the first (8) and the second (9) parts of the block at least two separate joints (11) of "recess-ledge" type separated by said first groove to rule out the relative shifts of said blocks in whatever direction (A).EFFECT: better grip on wet, snowy or icy roads.16 cl, 2 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 // 2526573
FIELD: transport.SUBSTANCE: invention relates to tread pattern of automobile tire intended to be used on ice. On the surface of tire crown zone located between both edges of tread there are multiple grooves positioned in circumferential direction of tire; multiple transversal grooves located in transversal direction of tire. Each of transversal grooves has point of curvature between main grooves and/or between main groove and tire edge so that they have convex from in circumferential direction of tire. Multiple main grooves and multiple transversal grooves from multiple separate blocks each one of which includes circumferential projection of shape that coincides with convex form of transversal grooves. Each of the blocks contains at least one transversal lamel located in tire transversal direction and coinciding in its shape with transversal grooves where transversal lamel size in tire transversal direction is equal to size of block with transversal lamel located in it if both ones are projected on one plane including tire rotation axis and perpendicular to block surface.EFFECT: better tire friction properties on ice.10 cl, 6 tbl, 14 dwg

Pneumatic tire // 2523539
FIELD: transport.SUBSTANCE: pneumatic tire 1 having excellent snow-running characteristics while keeping control stability and resistance to uneven wear, including tread 2 containing a pair of longitudinal crown grooves running continuously in longitudinal direction of tire at both sides of tire equator C and having edges, where one edge 3m runs in zigzag fashion, so that L-shaped sections 3s of groove edge are continuously interconnected in tire longitudinal direction, and the other edge 3n runs in corrugated manner so that arc-shaped sections of groove edge 3o having arc-shaped convexity towards groove centre are continuously interconnected in tire longitudinal direction where each section 3s of L-shaped groove edge includes long portion 3c inclined at angle of 1 to 20° relative to longitudinal direction, and short portion 3t with longitudinal length less than this value for long portion 3c and inclined in direction opposite to direction of the mentioned long portion 3c relative to longitudinal direction.EFFECT: improved characteristics.17 cl, 1 tbl, 10 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

Perfected noise killers for tires // 2521885
FIELD: transport.SUBSTANCE: tire has tread (1) including at least one groove (3) of circular orientation and multiple raised elements (21, 22). Note here that every said raised element comprises contact side (11) with crosswise width Lt and lateral walls (210). Note also that there is at least one raised element with multiple noise killing devices. Note that every said device has elongated cavity (4) of total volume Vc to open toward lateral wall (210). Note that said cavity features total length Lc larger than said length Lt and geometry that includes several interconnected parts (40, 41, 42, 43, 44, 45). Note also that length Lc makes the sum of parts of said cavity. Note that every said cavity (4) extends over the entire length Lc with notch (5) extending radially outward out to rolling surface. Note that sum tread sum Ly of lengths in projection in crosswise direction of every cavity is at least 1.5 times larger than the sum Lx of length in projection if the cavity circumferential direction.EFFECT: perfected noise killing.9 cl, 8 dwg
 
2551270.
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