Abstract: A pneumatic vehicle tire having a tread with profile blocks (4) formed by circumferential or diagonal grooves (1) and by transverse grooves (2), said profile blocks (4) each being provided with at least one sipe (5) that is straight or slightly curved in plan view, extends at least substantially parallel to the transverse grooves (2) and has a width of 0.3 mm to 2.0 mm, wherein the sipe (5) is bounded by two sipe walls (6), and wherein at least one protrusion (8) is provided on each of the otherwise unstructured sipe walls (6). The protrusion (8) formed on one sipe wall (6) is offset in the direction of extent of the sipe (5) with respect to the protrusion (8) formed on the other sipe wall (6), without a mutual overlap.

Abstract: The invention relates to a pneumatic vehicle tire (L) having at least one acoustic element (8), wherein the tire (L), fitted on a wheel rim (16), encloses with the rim (16) a space inside the tire (17), wherein the acoustic element (8) comprising a body (12) and a layer (13) is arranged on an inner tire surface (10) involved in delimiting the space inside the tire (17), wherein the body (12) is arranged on the inner tire surface (10) and wherein the layer (13) is arranged on a surface region of the body (12) that is facing the space inside the tire (17). The object is to provide a tire which has improved acoustic properties with less use of porous noise-reducing material and the acoustic element of which is more resistant to pressure changes.

Abstract: Pneumatic vehicle tire, in particular a commercial vehicle tire, having a tread which has a profile and has at least one circumferential groove (1) which is encircling in the circumferential direction, is embodied to a profile depth (PT) and in the cross section, starting at the tread external face, is composed of three adjoining groove portions, one outer groove portion (2) that expands in a funnel-shaped manner toward the outside, one 1 mm to 3 mm wide contracted groove portion, and one inner groove portion (4) which lies radially inward, is expanded in relation to the contracted groove portion (3) and has the largest cross-sectional face of all portions, and which is delimited by two cover flanks (4a), lateral groove flanks (4?b, 4?b) that adjoin said cover flanks (4a), and a groove base (4c).

Abstract: A vulcanizate of a rubber mixture for a vehicle tire, the rubber mixture containing at least one filler and 10 to 100 phr of at least one polymer A of the following formula: PS—R1—S—R2)n where S is a sulfur atom, and P is a polymer chain which is obtainable by anionic polymerization of at least one conjugated diene and optionally one or more vinylaromatic compounds and which has optionally been chain end-modified, R1 is most preferably C1-C8-alkyl, R2 is preferably selected from H and —SiR3R4R5 in which R3, R4 and R5 are independently selected from H, C1-C16-alkyl, C6-C16-aryl and C7-C16-aralkyl, and n is an integer selected from 1 to 200, where the —S—R1—S—R2 group(s) are bonded to the backbone of the polymer chain P.

Abstract: Pneumatic vehicle tire having two or more belt plies which have reinforcement members crossing one another at an angle, wherein the reinforcement members within each belt ply are arranged substantially parallel to and spaced apart from one another and are embedded in rubber material, wherein the belt has at least one first belt ply, the reinforcement members of which are formed by steel cords composed of two twisted-together steel monofilaments, wherein the steel falls within the reinforcement member class Ultra-Tensile (UT) with in each case a tensile strength of 3185 N/mm2 to 3920 N/mm2. It is therefore the object of the invention to provide a pneumatic vehicle tyre with low rolling resistance and simultaneously good handling properties. The object is achieved in that the first belt ply, at a predefined elongation of 1% in the direction of the reinforcement member longitudinal extent, has a stress of 26000 N per dm width to 43000 N per dm width.

Abstract: The invention relates to a pneumatic vehicle tire having two or more belt plies which have reinforcement members crossing one another at an angle, wherein the reinforcement members within each belt ply are arranged substantially parallel to and spaced apart from one another and are embedded in rubber material, wherein the belt has at least one first belt ply, the reinforcement members of which are formed by steel monofilaments of the reinforcement member class Ultra-Tensile (UT) with in each case a tensile strength of 3080 N/mm2 to 4190 N/mm2, wherein the steel monofilaments have a diameter D of 0.33 mm to 0.37 mm. It is the object of the invention to provide, at lower cost, a pneumatic vehicle tyre with low rolling resistance, by way of simultaneously simplified production. This is achieved in that the steel monofilaments have a torsion value of approximately zero windings in the case of a length dimension of 200 times the diameter of the steel monofilament.

Abstract: A device for sealing and inflating motor vehicle tires, wherein the device has, in a housing, a compressor which is driven by a motor, preferably an electric motor, and which serves for generating the sealing or pump pressure, and the device has a connector for a sealant container, a valve and distributor unit for sealant and pressurized gas, and furthermore connecting means such as hoses and lines, and also switching, control and display devices for the operation of the device, wherein the device furthermore comprises a manually actuatable pressure discharge valve for decreasing the tire pressure, wherein the pressure discharge valve is configured such that, when the sealant container is connected and/or during the delivery of sealant from the sealant container into the tire, an actuation, or a dissipation of the pressure, is prevented.

Abstract: A pneumatic vehicle tire, in particular a commercial-vehicle tire, having a one- or multi-ply carcass, a multi-ply belt or breaker and having a profiled tread with grooves formed to a profile depth, wherein the profiled tread is provided at the tire shoulders either with a respective block row (2) or with a respective profile rib (7), wherein the blocks (1) of the shoulder-side block rows (2), or the shoulder-side profile ribs (7) each have a peripheral edge (1a, 7a) laterally delimiting the ground contact patch of the tire, or a shoulder rounding with a radius of up to 30.0 mm, wherein shoulder flank surfaces that extend in a radial direction adjoin the peripheral edges or the shoulder roundings, and wherein, in the case of shoulder roundings, an imaginary section line is defined between an envelope of the tread that is continued beyond the shoulder rounding and the shoulder flank surface that is continued beyond the shoulder rounding.

Abstract: Disclosed are monomers for copolymerization with alkenes, dienes, vinyl compounds, and/or vinylidene compounds, a process for preparing a copolymer, a copolymer prepared by the process, a sulfur-crosslinkable rubber mixture, and the use of the sulfur-crosslinkable rubber mixture for production of motor vehicle tires. In one embodiment, the monomer has the formula A-S—P, wherein A is a chemical group containing at least one C?C aliphatic double bond, S is a sulfur atom, and P is a protecting group.

Abstract: A method is for determining a profile depth of a tire profile. The method includes at least the following steps: a) detecting an acceleration of a measurement point on a tire inner side of a vehicle tire, wherein a deviation, caused by contact of the vehicle tire with a roadway, of the acceleration of the measurement point within an observation window is detected, b) deriving at least one analytical characteristic variable which is characteristic of the profile of the detected acceleration, wherein the at least one analytical characteristic variable characterizes the non-periodic profile of the detected acceleration within one tire rotation, c) determining the profile depth in a manner dependent on the at least one analytical characteristic variable, wherein a calibration curve yields the dependency between the analytical characteristic variable and the profile depth, and the calibration curve assigns a profile depth to the derived analytical characteristic variable.

Abstract: A method is for producing a profile segment of a segmented casting-vulcanizing mold for vehicle tires, the molding area of which molds a segment of the tread profile of a tire to be vulcanized, including the steps: creating a rigid model segment having a casing-like tread surface; milling the profile positive of the tread into the casing-like tread surface of the model segment to obtain the master model; creating a flexible impression from the master model; creating a rigid plaster cast from the impression to form a casting core segment; casting all of the annular, placed-together casting core segments with an aluminium-magnesium alloy to obtain a vulcanizing mold, subsequently divided into profile segments. A plasma coating is applied to the tread of the model segment, into which the profile positive of the tread is subsequently milled to obtain the master model. Plasma coating gives the master model a defined roughness.

Abstract: Devices for sealing and inflating inflatable objects, in particular for sealing and inflating motor vehicle tires, wherein the devices have as a source of compressed gas a compressor unit, which is formed as a reciprocating piston compressor driven by a slider crank mechanism and has a piston moved in an oscillating manner in a cylinder, and wherein the piston and the cylinder delimit a compression chamber and the cylinder is closed on the output side by a cylinder head with an outlet valve.

Abstract: The invention relates to a polyamide cord for use as carcass strength member in a pneumatic vehicle tire, wherein the polyamide cord has a residual shrinkage in the range from 0% to 2% and a shrinkage at 180° C. in the range from 0% to 4.5%, where the residual shrinkage of the polyamide cord and the shrinkage at 180° C. of the polyamide cord are determined to ASTM D 855. The invention also relates to a pneumatic vehicle tire comprising one or more polyamide cords and to a process for producing one or more polyamide cords, to a process for producing a rubberized reinforcement ply and to a process for producing a pneumatic vehicle tire.

Abstract: A method monitors the tire pressure of a multiplicity of parked vehicles or vehicle trailers. The method has the following steps: making available a drone with a receiver unit for acquiring radio-based tire data from a tire pressure control system, wherein the drone is stationed at a base station; lifting off of the drone from the base station and flying along a predefined flight route, wherein the drone flies along a flight route above the vehicles or the vehicle trailers, wherein, while flying along the flight route, the drone takes into account the transmitter range of the respective tire pressure control systems; receiving tire data from one tire pressure control system or a multiplicity of tire pressure control systems with the receiver unit of the drone; flying the drone back to the base station; and, evaluating the received tire data with a central receiver and control unit.

Abstract: A pneumatic vehicle tire is provided. The tire includes a tread, an inner surface lying opposite the tread, a self-sealing sealant and a sound-absorbing open-cell foam ring arranged inside the pneumatic vehicle tire. The foam ring is adhesively attached to the inner surface and adheres to the self-sealing sealant which is applied before the sound-absorbing open-cell foam ring is attached to the inner surface. The self-sealing sealant has, at least immediately after being applied, a tackiness required for an adhesive attachment of the sound-absorbing open-cell foam ring. A closed-cell material ring is arranged between the sound-absorbing foam ring and the self-sealing sealant to prevent a diffusion of the sealant into the open-cell foam ring. The closed-cell material ring effects an airtight condition.