Safety tire for vehicles
AssigneePneumatiques, Caoutchouc Manufacture et Plastiques Kleber-Colombes
InventorsYves Masson, Jack Benard
Life of this patent
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Abstract
A safety tire comprising a tread (11), spaced beads (12) and sidewalls connecting the beads to the sides of the tread by forming under the tread a central inflatable chamber, each sidewall comprising an outside wall convex towards the outside and an inside partition convex towards the inside delimiting between each other lateral chambers distinct from the central inflatable chamber, characterized in that said lateral chambers are filled with a flexible cellular material rendering the sidewalls suitable to support the load of the wheel with a limited sagging of the tire in case of the deflating of the central chamber.
Claims19
A safety tire comprising a tread, spaced beads and sidewalls connecting the beads to the sides of the tread, said sidewalls defining a central inflatable chamber under said tread, each sidewall comprising two spaced walls joining each other at the top and bottom of the sidewall and delimiting therebetween lateral chambers separate from the central inflatable chamber, said lateral chambers being filled with a flexible cellular material that maintains the vertical rigidity of said spaced walls and that renders the sidewalls suitable to support the load of a wheel with a limited sagging of the tire in case of deflation of the central chamber.
A process for the manufacture of a safety tire having a tread, spaced beads and sidewalls connecting the beads to the sides of the tread, said sidewalls defining a central inflatable chamber under the tread and each sidewall comprising two spaced walls delimiting therebetween lateral chambers, said lateral chambers being filled with a flexible cellular material, which comprises, during the course of the manufacture of the tire on a manufacturing drum, the steps of inserting in the lateral chambers of the sidewalls a layer of elastomeric mixture and an inflating agent and vulcanizing the tire under pressure in a mold heated to obtain at the same time the decomposition of the inflating agent and subsequently the formation and expansion of the cellular material.
Dependencies are inferred from the claim text.