DE696302C

DE696302C - Cover for vehicle tires

Info

Publication number: DE696302C
Application number: DE1937696302D
Authority: DE
Inventors: Dr-Ing Giuseppe Venosta
Original assignee: Pirelli SpA
Current assignee: Pirelli and C SpA
Priority date: 1938-04-26
Filing date: 1937-11-23
Publication date: 1940-09-17
Also published as: BE427768A; FR829459A; FR852907A; BE433657A; GB527995A; GB486147A; CH212975A; CH205055A; BE427763A

Description

Die Erfindung bezieht sich auf eine Laufdecke für Fahrzeugbereifungen mit praktisch durchlaufender und fast die ganze Breite des Reifens einnehmender Lauffläche, wobei die Randteile dieser Lauffläche Ausladungen über dem Reifen bilden.The invention relates to a tread for vehicle tires with practical continuous tread that occupies almost the entire width of the tire, whereby the edge parts of this tread form projections above the tire.

An sich sind schon Laufflächenformen bekannt, die Versteifungsrippen aufweisen, die gegen die Flanken auslaufen. Die dabei von den bekannten Rippen gebildeten Hohlräume von verschiedener Form hatten aber mur den Zweck, als Verzierungen der Lauffläche zu dienen oder eine Kühlung derselben zu bewirken, ohne somit den für den vorliegenden Gegenstand wesentlichen Erfindungsgedanken zu berühren.Tread shapes are already known per se, which have stiffening ribs that run out against the flanks. The cavities formed by the known ribs of various shapes, however, had only the purpose of decorating the running surface serve or to effect a cooling of the same, without thus for the present To touch the subject of essential inventive ideas.

Die Erfindung betrifft demgegenüber eine Laufdecke für Fahrzeugbereifung mit sehr breiter und flacher, zusammenhängender Lauffläche, bei deren Verwendung weder eine übermäßige Erwärmung eintritt noch ein Mehrverbrauch von Kautschukmaterial bei ihrer Herstellung erforderlich ist. Sie besitzt also- die bekannten Vorteile der bekannten breiten Lauffläche, ohne die Nachteile aufzuweisen. In contrast, the invention relates to a tread for vehicle tires with very wide and flat, contiguous tread, when using neither a excessive heating leads to an increased consumption of rubber material their manufacture is required. So it has the known advantages of the known wide tread without the disadvantages.

Die Laufdecke gemäß der Erfindung ist dadurch gekennzeichnet, daß die Ausladungen eine Vielzahl von seitlich offenen Nischen bedecken, die sich tief unter der Lauffläche erstrecken und deren auf die Flanken des Reifens sich stützende Seitenwände torbogenförmige Gestalt haben.The tread according to the invention is characterized in that the projections a multitude of laterally open niches cover that extend deep under the tread extend and their side walls, which are supported on the sidewalls of the tire, are arched-shaped Have shape.

Dde Lauffläche gemäß der Erfindung wird bezüglich ihrer seitlich ausladenden Teile nur durch verhältnismäßig schmale, im Abstand voneinander ,angeordnete Stützrippen getragen, die auf die- seitlichen Flankein des Reifens auflaufen. In den Zwischenräumen zwischen je zwei Stiitzrippen verlaufen die Flan-The tread according to the invention is only with respect to its laterally projecting parts supported by relatively narrow, spaced apart support ribs, which run onto the side flanks of the tire. In the spaces between two support ribs run along the flanges

Claims

696

ken the tire without reaching the tread, to the central tire zone, along such a line that the Thickness of the rubber layer arranged above the fabric inserts of the carcass is lower remains than the smallest thickness in the central part of the tread between the deepest Point of their notches and the fabric inlays. Under relatively sharp Incidentally, support ribs are to be understood as those whose thickness the distance between does not exceed two adjacent ribs. It is useful to attach the support ribs to guide their upper ends in an arc against the running surface; because it has been shown that this results in the laterally projecting Parts of the tread are better worn. For the purpose of clarification of the invention is a Embodiment in the drawing partly in cross section, partly in perspective view shown.

In the drawing, 1 denotes rigid beads of a known type, around which the fabric inserts. 2 leads around ge in a known manner and through the rubber suits where the flanks 3 are made, are covered. The running surface 4 has laterally projecting Parts 6, which are supported by ribs 5., which in their upper part with arches 7 run out against the parts 6. The latter can through relatively narrow gaps 8 can be subdivided to give the tread increased flexibility.

The flanks 3 of the tire casing are not directly connected to the tread, but rather run in a specific line independent of the tread towards the center of the tire. The laterally projecting parts 6 of the j running surface 4 are only supported by the ribs 5, which run against the flanks 3 and have a thickness B which is less than the distance D between two adjacent ribs.

This saves material. This also avoids unnecessary deformation work, so that the heating is reduced and the tire is more durable.

Of course you can see the proportions of the different parts of the barrel under Preservation of the conditions characteristic of the invention.

PΛ TIi N T A N S 1 'K UCH:

Tread for vehicle tires with practically continuous and almost the entire width of the tire occupying tread, the edge parts of this The tread form projections above the tire, characterized in that the projections cover a multiplicity of laterally open niches (7) which extend deep under the tread and their onto the sidewalls of the tire supporting side wall ^ '(5) arch-shaped Have shape.

1 sheet of drawings