The invention relates to a pneumatic vehicle tire having a tread with profile blocks (1, 1'), with in each case a block outer surface (4) and at least one sipe (7), which in top view extends at an angle of 0° to 50° to the axial direction, crosses the respective profile block (1, 1'), is divided into block segments (1a) and has a width (bE1) of 0.4 mm to 1.2 mm, a maximum depth (tE1) of 70% to 100% of the profile depth, two sipe walls (9) and a sipe center area (F1) spaced in accordance with the sipe walls (9), wherein the crossing sipe (7), at least in a sipe region extending in top view over a part of the sipe (7), is made to the maximum depth (tE1) and has a protuberance (7b), which is at a distance from the block outer surface (4) and, as seen in the corresponding cross section perpendicularly to the sipe center area (F1), is formed between a radially outer delimiting line (La), which runs with respect to the sipe center area (F1) at a constant first depth determined in the radial direction through the radially outermost point of the protuberance (7b), and a radially inner delimiting line (Li), which runs with respect to the sipe center area (F1) at a constant second depth determined in the radial direction through the radially innermost point of the protuberance (7b).In each case at least one additional sipe (8, 8?) which is elongate in top view and has a width (bE2) of 0.3 mm to 1.0 mm and a maximum depth (tE2) is formed in block segments (1a) of the profile blocks (1, 1?), said additional sipe (8, 8?) enclosing supplementary angles (?) with the crossing sipe (7) deviating from 90° by up to 60° and, in the region radially outside the protuberance (7b) of the crossing sipe (7), has a sipe end portion (8a, 8?a), wherein the point of the maximum depth (tE2) of the additional sipe (8, 8?) lies radially inside the level of the radially outer delimiting line (La) of the protuberance (7b).
The invention relates to a pneumatic vehicle tire having a tread strip with at least one profile block row (1) that on at least one side is delimited by a circumferential groove (2) and which is divided into profile blocks (2) by a multiplicity of transverse grooves (4) that when viewed from above run parallel to one another and at mouth regions open into the circumferential groove (2), wherein the profile blocks (5) have in each case two block corner regions (5a, 5b) formed by the circumferential groove (2) and the transverse grooves (4), and extending therebetween one lateral block flank (12) configured on the circumferential groove (2), wherein the lateral block flank (12) is composed of a beveled block-flank circumferential portion (12u1) having a bevel (15) which forms an oblique face and runs to the tread strip periphery, and a bevel-free block-flank circumferential portion (12u2) which terminates at a block edge (14) running on the tread strip periphery.Mouth regions of transverse grooves (4) are in each case formed by a notch (6) which in relation to the level of the lateral block flanks (12) protrudes into the profile block row (1) in the axial direction, is open toward the tread strip periphery and widens continuously to the circumferential groove (2), said notch (6) having two delimiting faces (6a, 6b) which are configured on the block corner regions (5a, 5b) of adjacent profile blocks (5) and when viewed from above run in a V-shaped manner with respect to one another and between the respective transverse groove (4) and the circumferential groove (2), wherein a bevel-free block-flank circumferential portion (12u2) adjoins the one delimiting face (6a), and a beveled block-flank circumferential portion (12u1) adjoins the other delimiting face (6b).
The invention relates to a pneumatic tyre for a vehicle - having a directional tread with at least two profile block rows (1, 2), which are separated by a circumferential channel (5) and are subdivided into profile blocks (7, 9) by transverse channels (6, 8), which open into the circumferential channel (5) and extend parallel to one another in plan view, - wherein the circumferential channel (5) has channel portions (5a) which extend parallel to one another, each separate a profile block (7) of the one profile block row (2) from a profile block (9) of the other profile block row (1) and have a channel base (5a?) and a leading end (5a1), which enters the underlying surface first when the tyre rolls in forward travel (arrow R), and a trailing end (5a2), - wherein the profile blocks (7, 9) each have, at the tread periphery, along the channel portions (5a), a block edge (9c, 13) extending in a straight line in plan view and a block flank (11, 12) starting from the block edge and extending as far as the channel base (5a?) of the respective channel portion (5a), - wherein at least the profile blocks (9) of the one profile block row (1) are provided with sipes (10), which open into the channel portions (5a), have sipe bases (10c) and subdivide each of the block edges (9c) into block edge portions (9c?). The block flanks (11) of the profile blocks (9) which are provided with the sipes (10) opening into the channel portions (5a) form a uniformly stepped structure along the channel portion (5a), which structure is composed of flank surfaces (11a) and transition surfaces (11b), -wherein the flank surfaces (11a) start from the block edge portions (9c?) and extend as far as the channel base (5a?), and - the transition surfaces (11b) extend between the flank surfaces (11a) and from the channel base (5a?) to the sipe base (10c) and are narrower than the flank surfaces (11a), and - wherein, when viewed through a channel portion (5a) in the direction (arrow P) from the leading end (5a1) to the trailing end (5a2), the flank surfaces (11a) obscure the transition surfaces (11b).
A pneumatic vehicle tire having a tread (1) which has a profile and has a middle circumferential rib (3) delimited by two sides (4, 4'), running at least approximately parallel to one another, of two circumferential channels (2, 2') which encircle the entire pneumatic vehicle tire, which circumferential channels run at least approximately perpendicular to the axial direction A of the pneumatic vehicle tire in that they only deviate by an angle ? of less than 15° from the radial direction of a plane perpendicular to the axial direction A, such that the width of the circumferential rib (3) thus remains constant or increases with increasing profile depth. The circumferential rib (3) has, at regular spacing intervals d in a circumferential direction, a sipe (6) which runs from one to the other of the mutually parallel sides (4, 4') of the two encircling circumferential channels (2, 2') along a contour line (10). At three to seven times the length of the spacing interval d of the sipes (6) in the circumferential direction, in each case one thin transverse channel (8) is arranged in the middle circumferential rib (3) in place of a sipe (6), the width BQ of which thin transverse channel is at least 2.5 times the width BF of a sipe (6) and which thin transverse channel has the contour line (10) of the sipes (6). The depth TF of the sipes (6) is at least partially reduced, over a length Lred of the contour line (10), in the end regions of the sipes (6), and, over 80% to 250% of said length Lred of the contour line (10), the thin transverse channels (8) have in their end regions a snow pocket (20). The snow pockets (20) have a width Bs perpendicular to the contour line (10) of at least 1.5 times the width BQ of the thin transverse channel (8) and has a depth TS of at most 65% of the profile depth TQ of the thin transverse channel (8).
The invention relates to a pneumatic vehicle tire with a directional tread strip with two shoulder-side profile ribs (3), two middle profile ribs (2) and one central profile rib (1), the profile ribs (1, 2, 3) being separated by two shoulder-side circumferential grooves (5) and two middle circumferential grooves (4), the shoulder-side profile ribs (3) and the middle profile ribs (2) being divided into profile blocks (2a, 3a) by way of transverse grooves (8, 9) which run in a V-shaped manner in plan view across the width of the tread strip, run parallel to one another within the profile ribs (2, 3), open into the shoulder-side circumferential grooves (5) and have a width (bQR) from 3.5 mm to 6.5 mm, and the shoulder-side circumferential grooves (5) having groove sections (5a) which run inclined to the circumferential direction in plan view, each divide a profile block (2a) of the middle profile ribs (2) from a profile block (3a) of the shoulder-side profile ribs (3), and have a leading end (5a'), encountering the underlying surface first when the tire rolls during forward travel, and a trailing end (5a'').The transverse grooves (8), which run in the middle profile ribs (2), end in front of the respective middle circumferential groove (4) at a spacing (a1) determined in the axial direction, the groove sections (5a) of the shoulder-side circumferential grooves (5), seen in plan view, being inclined to the circumferential direction in such a way that the leading ends (5a') of the groove sections (5a) are closer to the tire equatorial plane (line A-A) in comparison with the trailing ends (5a'') of the groove sections (5a).
FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (Germany)
Inventor
Behm, Frank
Herzog, Katharina
Janczak, Norbert
Recker, Carla
Venz, Carsten
Prufer, Dirk
Schulze Gronover, Christian
Abstract
The invention relates to a process for obtaining natural rubber from plant material containing at least the step of milling the plant material with at least one ball mill comprising milling media. The invention further relates to the natural rubber obtained by this process and to the use of at least one ball mill comprising milling media for milling plant material when obtaining natural rubber from plant material. In the process, the ball mill has a nonmetallic lining and/or the milling media have at least a nonmetallic surface.
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (Germany)
Inventor
Recker, Carla
Herzog, Katharina
Behm, Frank
Janczak, Norbert
Venz, Carsten
Muller, Lowis-Gerrit-Boje
Prufer, Dirk
Schulze Gronover, Christian
Abstract
The present invention relates to a process for obtaining non-aging natural rubber, a rubber composition containing the natural rubber thereby obtained, and the use of the composition for producing consumer goods.
The invention relates to a pneumatic tyre for a vehicle having a tread with profile positives (1, 1', 1") with cuts (3, 3', 3"), which run in plan view parallel to one another and at an angle to the axial direction of 0° to 50°, a width (b1) from 0.4 mm to 0.8 mm, a central cut section (3a) running in plan view in the form of a harmonic wave with a wave centre line (Iw) corresponding to the propagation direction of the wave and two edge cut sections (3b), the course of which defines a cut base line (IEB) running parallel to the wave centre line (Iw), wherein the wave centre line (Iw) of the central cut portion (3a) runs parallel and offset to the cut base line (IEB) of the cut (3) and the offset (a1) is 75% - 400% of the amplitude (A) of the harmonic wave of the central cut portion (3a).
22 Abstract A pneumatic vehicle tire having a tread comprising profile elements is provided. The profile elements include spikes having a spike body anchored therein, and a spike pin positioned in said spike body. The spikes of a first type and of a second type are provided, the first type spikes effecting better lateral force transmission than the second type spikes, which effect better circumferential force transmission than the first type spikes, wherein depressions for receiving ice particles are formed in the profile elements proximate the spikes, the first type spike depressions differ from the second type spike depressions in their shape and/or their position relative to the spike such that, when driving on ice, the first type spike depressions receive more ice particles forming under the influence of lateral forces and the second type spike depressions receive more of the ice particles forming under the influence of circumferential forces. Date Regue/Date Received 2022-12-14
The invention relates to a spike (3) for anchoring in a spike hole (11) of a tread (2) of a pneumatic vehicle tyre (1), comprising at least one foot (6) and a spike pin (4) anchored therein, wherein the spike (3) is at least partly coated with at least one vulcanized rubber compound and/or a thermoplastic vulcanisate. For improving lateral guiding forces, traction and braking on ice, the vulcanized rubber compound and/or the thermoplastic vulcanisate has a Shore A hardness according to DIN ISO 7619-1 at room temperature of 63 to 78 Shore A .
The invention relates to a pneumatic vehicle tire, comprising a tread having profile elements (1), for example tread lugs (1), which profile elements are separated from one another by grooves (2, 3) and are each provided with a plurality of sipes (4), which run at an angle of up to 45° to the axial direction and parallel to one another and have a constant width (B), a maximum sipe depth (T) and two sipe walls (5, 6). The sipes (4) are composed of a main portion (4a) reaching to the maximum sipe depth (T) or of such a main portion (4a) and at least one shallower edge portion (4b). In a top view of the sipe (4), the main portion (4a) comprises at least one shorter portion (4"a) and at least one portion (4'a) longer than the at least one shorter portion. The portions (4'a, 4"a) include an angle (a) of 90° to 140° with one another. In the longer portion (4'a), at least one recess (9) is formed in the one sipe wall (5), and a protrusion corresponding to the recess (9) lies opposite the recess on the other sipe wall (6). The protrusion (10) and the recess (9) are elongate in the direction of extent of the sipe (4). In the longer portion (4'a) or in each longer portion (4'a) of the main portion (4a), exactly one recess (9) which is mirror-symmetrical with respect to a cross-section center plane (E2) that is perpendicular to the sipe wall (5) and that runs in the radial direction and with respect to a longitudinal-section center plane (E1) that runs orthogonally to said cross-section center plane is formed in the one sipe wall (5). Any edge portions (4b) of the sipe (4) are free of protrusions (10) and recesses (9).
A stud (1, 1') having a stud body (2, 2') which has a base flange (6, 6') and which is composed of a non-metallic, elastic material, in particular a rubber material, and having a stud pin (3, 3') which is composed of hard metal and which is anchored in an insert (4, 4') and which projects with an end portion beyond the stud body, said insert being situated within the stud body and having a base part (4a, 4'a), wherein the base part (4a, 4'a) together with an encasing layer (5, 5') composed of the material of the stud body forms the base flange (6, 6') of the stud body, and wherein the base flange has an outer contour which is of symmetrical design with respect to at least one plane of symmetry (Si, S2) and which has two long sides and two narrow sides. The outer contour of the base part differs geometrically from that of the base flange, such that, on one side of the base part, which is assigned to a long side and/or to a narrow side, the encasing layer (5, 5') has at least one portion in which said encasing layer is thicker than at the opposite side of the base part.
A pneumatic vehicle tire having a tread is provided. Spikes are arranged in spike tracks provided in respective spike zones, where both the spike tracks and the spike zones run in an encircling manner over the circumference of the tread. Each spike has a spike pin with an end portion projecting beyond the tread surface and which is non-circular and elongate and, in a greatest extent, defines a longitudinal axis. A base spike zone has a spike having a longitudinal axis having an angle of about 00 relative to the axial direction and divides the tread into right and left tread halves. In one tread half, the spikes are arranged such that the longitudinal axes assume greater angles relative to the axial direction the further axially outward the spike zone is positioned, the greater angles being between about 50 to about 90 .
A stud for anchoring in the tread of a pneumatic vehicle tire, having a stud body composed of an upper flange and a foot flange, and having a stud pin which is anchored in the stud body and by way of a pin portion protrudes beyond the upper flange, wherein on the otherwise planar upper side of the upper flange, there are formed two clearances which are mutually opposite with respect to the stud pin, proceeding from the stud pin run to the periphery of the upper flange, and terminate so as to be open at the periphery. The pin portion that protrudes beyond the upper flange is embodied so as to be elongate in the plan view, wherein the two clearances are directly contiguous to the sides of the stud pin that are wider in the plan view.
A pneumatic vehicle tyre having a tread with profile blocks is provided. The profile blocks are separated in a circumferential direction by transverse channels, and are crossed with sipes extending substantially parallel to the transverse channels. The profile blocks are provided with a number of micro-sipes, which extend parallel to the transverse channels and to the sipes. At least one of the transverse-channel-side profile block edges is made up of sections which run in an angled manner relative to one another. At least one of the transverse-channel-side profile block edges delimits the profile block at an elevated edge region which, in relation to the level of the rest of the profile block surface, has a height of 0.2 mm to 0.5 mm and which has a width from 0.2 mm to 1.2 mm. The sipes and micro- sipes are composed of a number of sections angled relative to one another.
The invention relates to a tire stud (1, 1') for anchoring in a tire stud hole of a tread of a pneumatic vehicle tire, comprising a tire stud body (2, 2'), which has a base flange (4, 4'), and comprising a tire stud pin (3) of hard metal, which is anchored in an insert (5, 5') located in the tire stud body (2, 2') and an end portion (3a) of which protrudes from the tire stud body (2, 2'), wherein: the insert (5, 5') has a base part (5a, 5'a) partly forming the base flange (4, 4') and has a pin holder (5b, 5'b) that holds the tire stud pin (3); and the tire stud body (2, 2'), optionally except for the insert (5, 5'), consists of a non-metal material, which surrounds the base part (5a, 5'a) at the base flange (4, 4'). At least the lower part of the base flange (4, 4') is surrounded by a vibration-damping rubber material into the region of lateral surfaces of the base flange (4, 4'), and at least that part (7, 7'b) of the tire stud body (2, 2') that directly adjoins the end portion (3a) of the tire stud pin (3) that protrudes from the tire stud body (2, 2') consists of an abrasion- and cutting-resistant material.
A tire stud (1, 1') for anchoring in a tire stud hole of a tread of a pneumatic vehicle tire, having a non-metallic tire stud body (2, 2') with a base flange (4, 4'), and having a tire stud pin (3) composed of hard metal anchored in the tire stud body (2, 2'), which tire stud pin projects with one end portion thereof beyond the tire stud body (2, 2') and is anchored with its second end portion within the tire stud body (2, 2') in a tire stud body part (8, 11a) composed of a first, non-metallic material, wherein that portion of the tire stud pin (3) which extends within the tire stud body (2, 2') between the end portions of the tire stud pin (3) is held in at least one further tire stud body part (2a, 11b) composed of a second, non-metallic material. The first tire stud body part (8, 11a), in which one end portion of the tire stud pin (3) is anchored, consists of thermoplastic or thermosetting plastic or of hard vulcanized rubber, wherein the tire stud body part (2a, 11a) in which that portion of the tire stud pin (3) which extends within the tire stud body (2, 2') between the end portions is held consists of abrasion-resistant and cut-resistant vulcanized rubber material or of a thermoplastic vulcanizate.
The invention relates to vehicle pneumatic tyres comprising a profiled tread with studs (1, 2), which are arranged in stud tracks (SP) running around the circumference of the tread, wherein each stud (1, 2) has a stud body (3, 4) anchored in the rubber material of the tread and a stud pin (5) protruding beyond the periphery of the tread, wherein studs (1) of a first type and studs (2) of a second type are anchored in the tread, which differ from one another in terms of the configuration of their stud body (3, 4), wherein the stud bodies (3, 4) each have a base flange (6, 7) and an upper flange (8, 9) and a central vertical axis including their centre of gravity, and wherein the studs (1) of the first type are positioned preferably mainly in lateral regions of the tread and the studs (2) of the second type are positioned preferably mainly in the central tread region. The upper flange (8) of the studs (1) of the first type has a single plane of symmetry (S1) passing through the vertical axis (a) and running at a < 45° angle to the axial direction, and the upper flange of the studs (1') of the second type have a single plane of symmetry (S2) passing through the vertical axis (a) and running at a < 45° angle to the circumferential direction, wherein the upper flanges (8, 9) each have different size extensions determined along the planes of symmetry (S1, S2) and starting from the vertical axis (a).
A spike for anchoring in a spike hole of a tread of a pneumatic vehicle tyre, having a spike body composed of rubber, a base part situated within the spike body and including a bottom flange and a pin holder in which a spike pin is anchored. The pin holder includes an end portion projecting beyond the spike body and the tread surface. The end portion and the bottom flange are surrounded by a rubber layer, with the bottom flange and the pin holder having an oval form in plan view, with the pin holder being rotationally offset relative to the bottom flange. The spike body has a diameter substantially corresponding to a centre width of the bottom flange, the base part has a height of 40% to 60% of a spike height, and the ratio between a length and a width of the pin holder is 1.10 to 1.18.
A vehicle tire comprising a tread profile and spikes which are formed with a spike tip with an encircling grip edge having first and second spikes, each having a grip edge, wherein the contour profile of the grip edge of the first spikes has a different form than the contour profile of the grip edge of the second spikes, and in that the spike tip of the first spikes is, with the contour profile of its grip edge, formed asymmetrically with respect to the planes which are perpendicular to its first axis, wherein the length of the projection, formed in the axial direction, of the grip edge of the first spikes is in each case greater than the length of the projection, formed in the axial direction A, of the grip edge of the second spikes.
A directional vehicle tire comprising a tread profile and spikes which are composed of a spike body and of a spike pin, wherein the spike body is formed from a foot flange, a central portion and a top flange, wherein the center of gravity of the spike pin, of the top flange, of the central portion and of the foot flange are arranged on a common straight line g, and wherein the foot flange is formed with a section contour in which that point of the section contour which is furthest remote from and situated in front of the line g is arranged at a distance a from the line g and in which that point of the section contour which is furthest remote from and situated behind the line g is arranged at a distance b from the straight line g, where a t b.
Spike for a pneumatic vehicle tire, the spike comprising: a spike body which is composed of a plastic comprising strengthening fibers, and a spike pin which is positioned in the spike body and which projects out of the spike body and which is composed of hard metal, wherein the spike body has a main body part and a foot part which projects laterally beyond the main body part. The spike pin extends in the spike body substantially as far as the level of the foot part and has a pin shank with at least one anchoring element which widens the radially inner end region of the pin shank, wherein the strengthening fibers in the central region of the foot part are oriented predominantly and substantially perpendicular to the spike pin.
The invention relates to a pneumatic vehicle tyre (1) having a profiled tread (2), into which a plurality of individual spikes (3) are integrated, each spike (3) comprising a pin (4) with a free end (5) projecting from the tread (2) and a foot (6) which is arranged opposite this free end (5) and whose surface is greater than that of the pin (4), the pin (4) and/or the foot (6) being integrated at least in sections into a rubber jacket (7).
A pneumatic vehicle tire with a tread profile for increasing the power transmission from the tire to snow-covered or ice-covered roadways. The tread profile comprises rows of profile block or profile strips that are separated from one another by grooves and profile positives with spikes positioned in spike holes. In the profile, starting from the spike, shallow elongated recesses extending in the two circumferential directions are formed as reservoirs for receiving shards of ice produced when the spike scrapes on ice. The recesses extending in the two circumferential directions are configured to correspond. In addition, in the profile, starting from the spike, at least one further recess extends in the axial direction. The recesses extending in the two circumferential directions and the at least one recess extending in the axial direction are the only recesses per spike. The recesses act as ice reservoirs for winter conditions.
The invention relates to a pneumatic vehicle tyre having a directional tread with profile positives, for example, profile block rows (1, 2) or profile bands (3), which are separated from one another by grooves, such as, for example, circumferential grooves (3), transverse grooves (4), oblique grooves (7), and the like, wherein profile positives having spikes (9) positioned in spike holes (8) are provided and, around each spike (9), starting from the spike (9) in the profile positive, at least in the two circumferential directions (U) - in and counter to the direction of movement during forward travel - shallow and elongate recesses (10, 10', 11, 11', 12, 12') having different volumes and different lengths of extent are formed as reservoirs for receiving the ice shards produced when the spike (9) scrapes on ice. The recess(es) (10, 10') which, during forward travel, extends or extend from the spike (9) in the direction of movement, has or have the greatest volume (V1) in the event of a plurality of recesses (10, 10').
Tubeless pneumatic vehicle tire comprising a tread (1) that has a plurality of spikes (5), further comprising sidewalls (3), bead regions (2) and an airtight inner ply (4) that forms the inner face (4a) facing the interior of the pneumatic vehicle tire, a noise damping ply (6, 6', 6") being circumferentially mounted in the area of the inner face (4a) lying opposite the tread (1). The noise damping ply (6) has a maximum degree of absorption in the range of 300 to 500 Hz.
The invention relates to a pneumatic vehicle tyre comprising at least one planar element on at least one side wall (3), said element consisting of a three-dimensionally structured pattern (5, 5 ') having a plurality of corresponding, uniformly arranged depressions (6, 6'), the largest diameter of which is = 0.70 mm and the greatest depth of which is = 0.60 mm. The depressions (6, 6') are substantially pyramidal with a square, regular pyramid as the base shape and are arranged in mutually perpendicular rows with their outer border edges (7, 7'), which run along squares when the pattern (5, 5') is viewed from above, running trough-like into the rubber material of the sidewall (3).
The invention relates to pneumatic vehicle tires having profile blocks, in which sipes (4) are formed each provided with two symmetrically running sipe walls (5), and which in a radial direction are composed of three adjoining portions (4a, 4b, 4c), having a radially outer portion (4a), which is substantially limited by wall portions (5a) running in a radial direction and extending up to a depth (ti) of 70% to 90% of the depth (t) of the sipe (4), a middle portion (4b) running between the radially outer portion (4a) and the radially inner portion (4c), and a radially inner portion (4c) that is provided with wall portions (5c), which in their cross-section extend from the central plane (E) in an outwardly rounded fashion.
The invention relates to a pneumatic vehicle tire, comprising a profiled tread having a circumferential groove (3), which separates radially raised profile elements (5, 7) arranged adjacent to each other from each other, wherein the circumferential groove (3) is bounded inwardly in the radial direction R by a groove base and axially by a groove wall on each of both sides of the groove base, wherein each of the profile elements (5, 7) separated by the circumferential groove (3) is bounded outwardly in the radial direction R of the tire by a radially outer surface and in the axial direction A toward the circumferential groove (3) by a flank (8, 9), which flanks extend in the radial direction R from the groove base (16) to the radially outer surface and each form one of the two groove walls, wherein extensions (10, 13) are formed toward the circumferential groove (3) on both flanks (8, 9), which extensions continuously broaden toward the groove base (16) and extend stepped in a saw-tooth shape in the circumferential direction U of the tire with alternatingly arranged first extension segments (11, 14) of the length L measured in the circumferential direction U, the greatest extension direction component of which is oriented in the circumferential direction U, and second extension segments (12, 15) of the length b measured in the circumferential direction U, the greater extension direction component of which is oriented in the axial direction A, wherein L > b, wherein the first extension segments (11, 14) of the saw-tooth-shaped course on the two flanks (8, 9) are oriented with the same inclination direction along the extent in the circumferential direction U, in such a way that an angle of inclination a is included together with the circumferential U in each case.
The invention relates to a vulcanization mold for vulcanizing a pneumatic vehicle tire, in particular a winter passenger-car tire, comprising mold segments, which form the profiled tread of the tire and have molding ridges, which form recesses (1) for forming profile blocks (6a, 8a, 11a) or block-like profile positives (19, 20), wherein lamellar sheets (2) are anchored in recesses (1) in order to form incisions (21, 22) in the profile blocks (6a, 8a, 11a) or block-like profile positives (19, 20), wherein the lamellar sheets (2) divide the recesses (1) into sections (3), in each of which at least one venting bore (4) is formed in the mold segment. In each of the sections (3) of the recesses (1), a number of elevations (5) crossing the particular recess (1) parallel or substantially parallel to the extent of the lamellar sheets (2) is formed, the course of which elevations is interrupted at the venting bores (4). The invention further relates to a pneumatic vehicle tire that is produced by means of the vulcanization mold.
B29C 33/10 - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING - Details thereof or accessories therefor with incorporated venting means
A pneumatic vehicle tyre, in particular for use under winter driving conditions, wherein in each case two block row pairs (2, 3) run in each tread half and are separated from one another by first circumferential grooves (4, 5) which run in the circumferential direction and are formed in the maximum profile depth, wherein second circumferential grooves (10, 11) which are made narrower than the first circumferential grooves (4, 5) and extend as far as a depth which is lower than the maximum profile depth run between the block rows (6, 7, 8, 9) of each block row pair, wherein all the transverse grooves (6b, 7b, 8b, 9b) have a depth which changes over their extent such that their groove base, considered in cross section, runs along a curve which is slightly curved in an S shape, wherein the depth of the transverse grooves (6b, 7b, 8b, 9b) at their junction points with the first circumferential grooves (4, 5) or at their ends on the outer shoulders (20) of the tyre corresponds at least essentially to the maximum profile depth, and wherein the depth of the transverse grooves (6b, 7b, 8b, 9b) at the junction regions with the second circumferential grooves (10, 11) corresponds to the depth of these circumferential grooves (10, 11).
Pneumatic vehicle tyre with a profiled tread comprising radially raised profile elements (1, 2, 3), which are delimited by grooves (4, 5), and comprising sipes (6, 7, 8), which are formed at least in some of the profile elements (1, 2, 3) and extend to a depth T, extending in a first radial outer range of extent (16) with a height h1 where (1/2)T=h1=0.9T and extending in a second radial inner range of extent (26) with a height h2 as far as the base of the sipe (12), wherein the first radially outer range of extent (16) is arranged at an angle of inclination a to the radial R where 0°=a=3°, and the second radially inner range of extent (26) is formed such that, from the first radially outer range of extent (16), it extends in a curved manner to one side as far as the base of the sipe (12).
The invention relates to a vehicle tyre, in particular for use in winter driving conditions, comprising a tread having positive profiles (1), for example profile blocks or tread strips, which are separated from one another by grooves (2), by transverse grooves (3) and the like extending peripherally in the circumferential direction, wherein each of said positive profiles is provided with a plurality of narrow indents (4) which extend at least substantially parallel to one another and at least substantially in the transverse direction of the tread and the indent walls (5) of which located opposite of one another have projections (6, 7) and depressions (16, 17) that correspond to one another. The projections (6, 7) are overall rounded raised areas, which are surrounded by wall regions which remain unstructured, wherein projections (6) are disposed at individual locations in the radially outer region of the indent wall (5), each of said projections (6) having a flattened face forming a support surface (6a) which is oriented in the radial direction and substantially perpendicular to the indent wall (5), and wherein projections (7) are disposed at individual locations in the radially inner region of the indent wall (5), each of said projections (7) having a flattened face forming a support surface (7a) which is oriented substantially parallel to the positive profile surface.
The invention relates to a vehicle pneumatic tire, in particular for use in winter driving conditions, having a tread which is segmented into tread lugs (2, 5, 6) by scores (4), grooves (3, 14) and the like, wherein there are tread lugs (6), each having at least three indents (12) extending substantially in a corresponding direction and each running under an angle of 45° at a maximum to the transverse direction of the tread. According to the invention, the tread has tread lugs (6), the indents (12) thereof having angles of varying size (a1 to a6) to the transverse direction of the tread, which are incrementally larger or smaller from indent (12) to indent (12), beginning at one of the two outermost indents (12) in the circumferential direction of the tread lug (6).
The invention relates to a tread surface profile of a vehicle tire having two radially raised profile block elements (12, 13), adjacent in the axial direction A of the pneumatic vehicle tire, which are spaced apart from one another by a profile groove (6) and each delimited in the circumferential direction by a transverse or skewed groove (5) and having a groove bottom (16) of the profile groove (6) which is raised radially over the groove bottom (15) of the transverse or skewed groove (5), wherein an additional, narrow channel (27) is formed along the entire extension of the profile groove (6) in the groove bottom (16) having a channel depth tN measured in the radial direction R, which extends starting from the first transverse or skewed groove (5) to the second transverse or skewed groove (5), running diagonally through the profile groove (6) from the groove wall (19) of the profile groove (6) delimiting the second profile block element (13) up to the groove wall (18) of the profile groove (6) delimiting the first profile block element (12).
The invention relates to a tread profile of a pneumatic vehicle tire having a plurality of radially raised profile elements (1) spaced apart from one another by means of scores (2, 3, 4) or grooves, each being delimited in the radial direction R to the outside by an outer surface (8) forming the ground contact surface, wherein at least one spike (5) is formed in at least one profile element (1) which is anchored by the spike body (6) thereof in the rubber material of the profile element (1) and designed having a spike point which extends out of the spike body (6) in the radial direction R of the tire and ends in a radial position outside that of the outer surface (8) of the profile element delimiting the profile element (1) radially to the outside and forming the ground contact surface, wherein there is a recess (9) formed in the outer surface (8) delimiting the profile element (1) radially to the outside and forming the ground contact surface for expelling ice which surrounds the spike (5) in a substantially ring-shaped manner.
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