Continental Aktiengesellschaft

Uwe Ramcke

Hagen Trabandt

Bernd Lange

Ulrich Geffert

A pneumatic vehicle tire has a tire tread with circumferential grooves. Each one of the circumferential grooves has a groove base and groove flanks. At least one of the circumferential grooves has a wiper rib member connected integrally to the groove base and extending over the entire circumferential length of the circumferential groove such that the wiper rib member is connected to the groove base but is separate from the groove flanks. The wiper member has, when viewed radially outwardly, a lower portion and an upper portion, wherein the upper portion is divided by transverse grooves into member sections and the lower portion is continuous in the circumferential direction. The transverse grooves are slanted at an angle of 10.degree. to 40.degree. relative to the axial direction. The transverse grooves comprise a first set and a second set, with the transverse grooves of the first set oriented opposite to the transverse grooves of the second set. The transverse grooves of the first set alternate with the transverse grooves of the second set such that the member sections of the wiper rib member have a trapezoidal contour.

Vehicle tire with wiper rib member

A method and a device for producing pneumatic vehicle tires in a radially divided vulcanization mold provides a space for the excess rubber material outside of the tire contour to be vulcanized and thereby improves the trueness of the vulcanized tire.

Method and device for producing a pneumatic vehicle tire

Tire

A pneumatic vehicle tire which is especially suitable for non-driven axles of commercial vehicles is provided with wave-shaped circumferential grooves. The wave amplitude at the bottom of the groove is greater than at the tread periphery. This is achieved by periodically twisting the circumferential groove in the circumferential direction. The wave amplitude at the tread periphery may equal zero. In order to reduce the tendency to retain stones, it is suggested that the circumferential grooves in their center sections are provided with a transverse portion relative to the circumferential direction while in the extreme section further portions extend at a small acute angle relative to the circumferential direction.

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Walsrode, Germany

Uwe Ramcke