Winter tire with higher grip at snow-clad surfaces

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

 

The technical field to which the invention relates.

The present invention relates to a winter tire with better traction on snowy surfaces.

The level of technology

One of the most important characteristics of winter tires is its coupling with snow-covered surfaces (i.e. surfaces completely covered with snow), namely, its ability to create the appropriate friction when driving a vehicle on snow-covered surfaces.

The friction created between winter tyres and snow-covered surface is defined by a set of edge effect generated by the tyre tread, penetrating in the snow, and the shearing forces caused by friction between the snow captured by the tread (in particular the tread grooves), and snow cover.

The shearing force can be increased by increasing the capture of snow grooves in the tire tread, and increase edge effect bus by multiple edges in the tread, can create pressure peaks of the snow-covered road surface to penetrate into the snow.

To increase the capture of snow grooves of the tread winter tires, it was suggested that the lateral surface of the blocks defining the grooves, to form a zigzag pattern. Thus, the grooves of the tread will capture more snow in the communication system, that zigzag lateral surface of the blocks will contribute to the accumulation of snow.

In the patent application W003013881 A1 offers a winter tyre, the most suitable for snow-covered surfaces, the side surfaces of the tread blocks which formed triangular or arrow-shaped grooves, the depth of which varies (the lowest depth of the top of the groove), and which, most importantly, elongated in the direction to the Central grooves.

The effectiveness of these technical solutions is to capture a larger volume of snow grooves of the tread winter tires and, thus, increase the shearing forces, however, these technical solutions do not allow to increase the edge effect and to achieve good performance winter tires on snow-covered surfaces.

Disclosure of inventions

The present invention is to offer a winter tyre with superior traction on snow-covered surfaces, which does not have the above disadvantages and provides excellent traction on snow-covered surfaces, and will also be cheap and easy to manufacture.

Thus, it is proposed winter tire according to the present invention, having improved traction on snow-covered surfaces, in accordance with paragraphs appended claims.

Brief description of drawings

Permissive variant of implementation of the present invention will be described by example with reference to the accompanying drawings.

Figure 1 - schematic view in plan of the site of the tread winter tires according to the present invention, and to simplify the drawing details are not shown.

Figure 2 is a side view in enlarged scale of the block tread tyres are presented in figure 1.

Figure 3-7 - side views on an enlarged scale of three variants of block tread presented in figure 2.

Fig is a schematic view in plan of the site of the tread winter tires according to an additional variant of implementation of the present invention, and to simplify the drawing details are not shown.

Fig.9 is a side view in enlarged scale of the block tread tyres presented on Fig.

Figure 10-16 - side views on an enlarged scale of three variants of block tread tyres presented on Fig.

The implementation of the invention

In figure 1 reference number 1 designated winter tire as a whole, containing the protector 2 with toroidal base surface 3, continuing around the Central rotation axis.

The protector 2 has a relief pattern formed by a plurality of longitudinal or circumferential grooves 4 (i.e. continuing along the circumference of the tread and located transversely to the axis of rotation) and the plural is the your transverse grooves 5 (i.e. parallel to the axis of rotation and disposable perpendicular to the longitudinal grooves 4.). Longitudinal grooves 4 and the transverse grooves 5 delimit blocks 6, which protrude radially from the base surface 3 of the tread 2 and form four longitudinal rows. Each block 6 has approximately the shape of a parallelepiped with a rectangular cross-section and has two longitudinal side surfaces 7, which are boundaries, respectively, of the two longitudinal grooves 4, and two lateral side surfaces 8, which are boundaries, respectively, of two transverse grooves 5.

Each block 6 has side channels 9, each of which is formed on the longitudinal side surface 7 of the block 6 and extends from the base surface 3 of the tread 2 to the upper surface 10 of the block 6. According to a variant embodiment of the invention, represented in figure 1, each block 6 has eight side channels 9, evenly distributed on both of the opposite longitudinal side surfaces 7. Alternatively, the side channels 9 can be formed only on one longitudinal side surface 7 and the transverse side surfaces 8, or only on the transverse side surfaces 8.

According to a preferred variant of the invention, each block 6 is formed zigzag slats passing radial is but through the upper surface 10 of the block 6.

Each side channel 9 is intended to prevent radial extension of the captured snow and, more specifically, to hold the inner layer of the captured snow, preventing its radial extrusion. In other words, the snow is extruded from the outer area of the side channel 9 (i.e. plot, close to the upper surface 10 of the block 6), whereas the inner area of the side channel 9 (i.e. the area close to the base surface 3 of the protector 2) is filled with snow. In the outer area of the side channel 9, which is exempt from snow, in contact with the snow surface tends to penetrate and hit the snow cover (thus increasing edge effect bus 1), and in the inner area of the side channel 9, which is in contact with the snow surface is filled with snow, it creates a contact snow-snow, which increases the shearing forces of the tire 1.

In other words, because when the vehicle tire rolls 1, each block of 6 cycles comes into contact with the snow surface. When the block is in contact with the surface of the snow, freed from the snow outside the area of each lateral channel 9 cut into the snow and filled with snow, while in the Packed snow of the inner section of the side channel 9 creates a contact snow-snow. In addition, the ri the rotation of the tire tread blocks cyclically not come in contact with the snow surface, resulting from the outdoor area of each lateral channel 9 snow is extended, while the inner section of the side channel 9 still filled with snow.

According to one of preferred embodiments of the invention, each side channel 9 has heterogeneity preventing radial extension of the inner section of the side channel 9 captured snow, and which in some embodiments of the invention forms a clear boundary between the inner area and outer area of the side channel 9.

Due to the aforementioned property, the tire 1 on snow-covered surfaces has a large edge effect, and a large shearing force, bringing the total friction created by the proposed bus that significantly exceeds the total friction created by the famous winter tires sold in the market at present.

As shown in figure 2 and 3, each side channel 9 is straight and is inclined relative to the radial direction 11. The slope of each side of the channel 9 relative to the radial direction 11 reduces the component of the centrifugal force (radial), which extends the snow from the side of the channel 9 and thus prevents radial extension of the inner section of the side channel 9 captured snow.

Preferably according the mu variant of the invention, the angle of each lateral channel 9 relative to the radial direction 11 is approximately from 20 to 60°, in particular from 30 to 45° (when increasing the angle of inclination amount of snow stretched from the side of the channel 9, is reduced). The specified angle must have the same value, in order to properly ensured partial exemption of the side channels 9, i.e. the removal of snow from the outer section of each side of the channel 9 and the maintenance of an internal section of each side of the channel 9 is completely filled with snow, because when you rotate the tires corresponding block 6 is in contact with the snow surface loop.

Under option presented in figure 2, the direction of the slope of each side of the channel 9 coincides with the direction 12 of rotation of the tire 1, whereas under option presented on figure 3, the direction of the slope of each side of the channel 9 is opposite to the direction 12 of rotation of the tire 1. If the direction of inclination of the side channels 9 opposite to the direction 12 of rotation of the tire 1 (Fig 3), then increases the cutting edges in the snow, but the channel is removed more snow, and therefore requires a higher angle and more complex geometry of the blocks 6. In contrast, if the direction of inclination of the side channels 9 corresponds to the direction 12 of rotation of the tire 1 (figure 2), it reduces the I cutting edges in the snow, but in the channels of the better kept snow, and therefore requires a smaller angle and less complex geometry of the blocks 6.

According to the options presented on figure 4 and 5, each side channel 9 has a zigzag shape with two consecutive oppositely inclined sections. Figs.4 and 5 show the side channels 9, which are differently oriented relative to the direction 12 of rotation of the tire 1, and the change in the slope of the side channel 9 defines the specified lateral heterogeneity of channel 9.

According to the options presented on Fig.6 and 7, each side channel 9 is curved, taking the tangential direction on the base surface 3 of the tread 2 and a radial direction on the upper surface 10 of the block 6. Figure 6 and 7 shows the side channels 9, which are differently oriented relative to the direction 12 of rotation of the tire 1, and the change in the slope of the side channel 9 defines the specified lateral heterogeneity of channel 9.

According to the options presented on Fig-16, each side channel 9 has a constriction 13, which locally reduces the cross-section of the side channel 9 and forms specified heterogeneity in the sideways channel 9, and, as a rule, is determined by at least one protrusion 14 on the inside side of the channel 9.

Under option presented on Fig.9, the narrowing 13 each lateral CA is Ala 9 is defined by two facing each other with the protrusions 14 (i.e. having the same radial location).

Under option presented on figure 10, the narrowing 13 of each side of the channel 9 is defined by two pairs of protrusions 14 located one above the other.

Under option presented on 11, narrowing 13 of each side of the channel 9 is defined by two projections 14 having a different radial location (i.e., shifted radially relative to each other).

According to the options presented on Fig.9-11, each of the ridges 14 is rectangular. According to the options presented on Fig-14, each protrusion 14 has the shape of a right triangle or wedge or triangle with a rounded top (arched or ellipsometry)or has the form of an isosceles or equilateral triangle with pointed peak), respectively.

According to the options presented on Fig.9-14, the side channels 9 are straight and radially directed (i.e. have no inclination relative to the radial direction 11). Alternatively, the side channels 9 can be of any shape described earlier and presented in figure 2-7. For example, under option presented on Fig, each side channel 9 has a zigzag shape and has two consecutive oppositely inclined section; and under option presented on Fig, each of the first side channel 9 is straight and is inclined relative to the radial direction 11.

According to a preferred variant of the invention, each side channel 9 has a rectangular cross-section. Alternatively, each side channel 9 may have a cross-section of another shape, for example, triangular, semicircular or trapezoidal.

Described winter tyre 1 has many advantages. First, the bus is cheap and easy to manufacture, since the side channels 9 can be respectively performed in a conventional mold for vulcanization of tires and, thus, in the manufacture of the proposed bus does not have additional costs compared with the manufacture of conventional tires. Second, through the side channels 9, performed in blocks of 6 bus 1, on a snow-covered surfaces have a large edge effect and a large shearing force, bringing the total friction created by the proposed bus that significantly exceeds the total friction created by the famous winter tires sold in the market at present.

1. Winter tyre (1) with improved traction on snowy surfaces containing protector (2) with a relief pattern formed by a plurality of longitudinal grooves (4) and transverse grooves (5)between the blocks (6)that protrude radially from the base surface (3) of the tread (2) and form at least one longitudinal row;
p and each block (6) has two longitudinal side surfaces (7), which are the boundaries of the two corresponding longitudinal grooves (4), and two lateral side surfaces (8), which are the boundaries of the two corresponding transverse grooves (5); and
at least one of the blocks (6) has side channels (9), each of which is formed on the side surface (7, 8) of the corresponding block (6) and extends from the base surface (3) of the tread (2) to the upper surface (10) of the block (6);
with winter tyre (1) characterized in that at least the first side channel (9) is inclined relative to the radial direction (11).

2. Winter tyre (1) according to claim 1, in which the first side channel (9) is straightforward.

3. Winter tyre (1) according to claim 1, in which the first side channel (9) is curved.

4. Winter tyre (1) according to claim 3, in which the first side channel (9) is tangentially directed to the base surface (3) of the tread (2) and radially directed (11) on the upper surface (10) of the block (6).

5. Winter tyre (1) according to claim 1, in which the first side channel (9) has a zigzag shape and has at least two successive oppositely inclined section.

6. Winter tyre (1) according to any one of claims 1 to 5, in which the first side channel (9) has a slope, the direction of which coincides with the direction of rotation (12) of the tire (1).

7. Winter tyre (1) according to claim 1, in which the first side Cana is (9) has a slope, direction which is opposite to the direction of rotation (12) of the tire (1).

8. Winter tyre (1) according to claim 1, in which the first side channel (9) is inclined relative to the radial direction (11) at an angle (α)constituting from 20° to 60°.

9. Winter tyre (1) according to claim 1, in which the first side channel (9) is inclined relative to the radial direction (11) at an angle (α), amounting to between 30° and 45°.

10. Winter tyre (1) according to any one of claims 1 to 5, in which the first side channel (9) has at least one constriction (13), which locally reduces the cross section of the side channel (9) and creates heterogeneity preventing radial stretching of snow, which was captured inside the side channel (9).

11. Winter tyre (1) according to claim 10, in which the constriction (13) side channel (9) is defined by at least one protrusion (14) inside the channel.

12. Winter tyre (1) according to claim 10, in which the constriction (13) side channel (9) is defined by at least two protrusions (14)having the same radial location within the channel.

13. Winter tyre (1) according to claim 10, in which the constriction (13) side channel (9) is defined by at least two protrusions (14)having a different radial position inside the channel.

14. Winter tyre (1) according to any one of claims 1 to 5, in which the side channels (9) are formed exclusively in the longitudinal side walls of the blocks (6).

15. Winter tyre (1) according to any one of claims 1 to 5, to the second side channels (9) are formed in the longitudinal side walls of the blocks (6), and the transverse side walls of the blocks (6).

16. Winter tyre (1) with improved traction on snow-covered surfaces,
containing protector (2) with a relief pattern formed by a plurality of longitudinal grooves (4) and transverse grooves (5)between the blocks (6)that protrude radially from the base surface (3) of the tread (2) and form at least one longitudinal row;
each block (6) has two longitudinal side surfaces (7), which are the boundaries of the two corresponding longitudinal grooves (4), and two lateral side surfaces (8), which are the boundaries of the two corresponding transverse grooves (5); and
at least one of the blocks (6) has side channels (9), each of which is formed on the side surface (7, 8) of the corresponding block (6) and extends from the base surface (3) of the tread (2) to the upper surface (10) of the block (6);
with winter tyre (1) characterized in that at least the first side channel (9) has at least one constriction (13), which locally reduces the cross section of the side channel (9) and determines the heterogeneity of preventing radial extension of the inner section of the side channel (9) captured the snow.

17. Winter tyre (1) according to clause 16, in which the constriction (13) is defined by at least one protrusion (14) inside the channel.

18. Winter tyre(1) according to clause 16, in which the constriction (13) is defined by at least two protrusions (14)having the same radial location within the channel.

19. Winter tyre (1) according to clause 16, in which the constriction (13) side channel (9) is defined by at least two protrusions (14)having a different radial location within the channel.



 

Same patents:

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.

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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.

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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.

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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

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

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

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

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

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

Pneumatic tire // 2521455

FIELD: transport.

SUBSTANCE: pneumatic tire includes tread section which contains ring grooves (2-4) running in circular direction of tire, as well as lateral grooves (5, 6) running in direction of tire width, and multiple road-contacting blocks (7), separated by ring and lateral grooves. Each of road-contacting blocks contains lamellae (8), which run from tread running surface inside blocks to specified depth in radial direction of tire, herewith, each one of lamellae has end section communicating with at least any one of ring and lateral grooves. At least one of multiple lamellae contains widening ring-shaped section on its inner end in radial direction of tire. Herewith, the widening ring-shaped section is increased in its diameter gradually and smoothly running to side walls of road-contacting block.

EFFECT: creation of pneumatic tire with high drainage effect, as well as prevention of tearing lamella in tire tread.

9 cl, 12 dwg, 1 tbl

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

Automotive tire // 2521033

FIELD: transport.

SUBSTANCE: invention relates to automotive winter tire tread design. Tire (1) has tread (2) containing central part (L1) covering from two sides the equatorial plane (7), and two shoulder parts. The central part (L1) is separated from shoulder parts (L2, L3) of tread by two first circumferential grooves (3, 6). At least two second circumferential grooves (4, 5) are located in the central part (L1). The second circumferential grooves (4, 5) determine margins of the central circumferential bar (10) containing multiple sipes (20) located in parallel to each other and at certain distance from each other. The second circumferential grooves (4, 5) have a mid line running as peak-to-valley scallops throughout tire length in direction along circumference. The mid lines with peak-to-valley scallops are mainly matching in phase with each other throughout tire length (1) in direction along circumference.

EFFECT: better operational properties when moving both over snowy and dry and wet road surfaces.

20 cl, 4 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 // 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

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

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