Abstract:
Disclosed herein is a method of designing spokes of a non-pneumatic tire which randomly arranges spokes around a circumference to optimize noise dispersion. The method of designing spokes of a non-pneumatic tire includes placing a plurality of spokes (2) holding and supporting a tread (1) to be radially installed around a circumference of the tire on a circular spoke support (3) under the tread (1) to be in contact with the ground, wherein the spokes (2) are arranged at three angles on the circular spoke support (3) around the circumference of the tire, the three angles being divided into a small angle (a), a medium angle (b) and a large angle (c), and the spokes (2) are arranged at irregular angles under a condition that a ratio (q) of the large angle (c) to the small angle (a) is greater than a ratio (p) of the medium angle (b) to the small angle (a).
Abstract:
A load-bearing structure for a bearing support intended to be mounted on a rim inside a tire fitted on a vehicle to support the tread of the tire in the event of a loss of inflation pressure is provided. The load-bearing structure includes a base, a crown, and an annular body connecting the base and the crown. The body includes a plurality of partitions distributed regularly circumferentially, extending axially substantially from one side to the other of the body and radially from the base to the crown with a mean orientation relative to the radial direction of between 10 and 50 degrees, in that two circumferentially adjacent partitions exhibit contrary orientations relative to the radial direction and in that two adjacent partitions define with the base and/or the crown cavities in the form of triangles or trapezoids.
Abstract:
Support element designed to be fitted to a rim inside a vehicle tire, for supporting the tread of this tire in the event of loss of inflation pressure, including a base, a cover and an annular body in which each supporting partition of the annular body is in the form of an oblique parallelepiped with two circumferentially oriented outer faces arranged on either side of said support element and two faces inclined relative to the circumferential direction by an angle α, two adjacent supporting partitions form a V-shaped pattern, and, at the base of the V, two adjacent supporting partitions are separated by a narrow axial slit extending radially through the whole of the annular body.
Abstract:
A safety support adapted to be mounted on a rim within a tire fitted on a vehicle, to support the tread of the tire in the event of a loss of inflation pressure. The safety support includes a substantially cylindrical base adapted to be fitted around the rim; a substantially cylindrical crown adapted to come into contact with the tread in the event of a loss of pressure, and leaving a clearance relative to the tread at rated pressure; an annular body for connecting the base and the crown. The support is produced, at least in part, by axially assembling a number of annular sections, such that each of the annular sections includes, regularly distributed over the circumference, connecting walls of substantially axial orientation extending at least over part of the annular body and adapted to cooperate with the connecting walls of the adjacent annular section(s) in order to axially assemble the annular sections.
Abstract:
A run-flat support ring, which is a component mounted upon a rim inside a tire to extend the distance the tire may travel at reduced or zero inflation pressure, is provided having one or more features that improve the process of mounting the support ring onto a rim and better tolerate variations, within manufacturing tolerances, in the respective diameters of the rim and the support ring.
Abstract:
A run flat safety support ring intended to be mounted on a wheel rim inside a tire equipping a vehicle for supporting the tire tread in case of loss of inflation pressure has a generally cylindrical crown intended to come in contact with the interior of the tire tread in the event of the loss of inflation pressure, but has a clearance from the tire tread interior at normal pressure. The ring also has an annular body located radially inward of the crown, the annular body comprising a grid of continuous reinforcement composite.
Abstract:
The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. The invention also is directed to such a support, capable of supporting a tread of the tire in the event of a drop in inflation pressure, and to a mounted assembly comprising this support. A rubber composition according to the invention comprises (phr: parts by weight per 100 parts of diene elastomer(s)): (a) a diene elastomer, (b) particles of an α-olefinic thermoplastic polymer having a melting point greater than or equal to 150° C., in an amount of 5 to 30 parts by weight per 100 parts diene elastomer (phr), wherein the mean size by weight of the particles is between 50 μm and 500 μm, (c) greater than 60 phr of reinforcing filler, and (d) from 3 to 8 phr of sulphur.
Abstract:
An auxiliary wheel rim for use in a vehicle wheel for enabling the car driver to drive the car to the repair shop safely upon explosion of the tire is disclosed to include a plurality of first rim element, a second rim element, a third rim element, a plurality of links respectively fastened to the lugs of the first, second and third rim elements with pins to connect the first rim elements in series between the second rim element and the third rim element; and screw bolt fastened to the second and third rim elements to connect the linked first, second and third rim elements into the desired annular auxiliary wheel rim.
Abstract:
A support ring for a runflat tire system which comprises an annular body made of an elastic material having a radially inner circumferential surface which fits to a mounting portion of a wheel rim when mounted thereon, and a radially outer circumferential surface which comes into contact with the inside of the tread portion of a pneumatic tire mounted on the wheel rim when the tire is deflated and loaded, wherein the outer circumferential surface is wider in the axial width than the inner circumferential surface, and in a cross section including the central axis of the support ring, the outline of the annular body is substantially a trapezoidal shape of which two parallel long and short sides are the outer and inner circumferential surfaces, respectively, and the remaining two sides are inclined at acute angles with respect to the long side.
Abstract:
The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. The invention also is directed to such a support, capable of supporting a tread of the tire in the event of a drop in inflation pressure, and to a mounted assembly comprising this support. A rubber composition according to the invention comprises (phr: parts by weight per 100 parts of diene elastomer(s)): (a) a diene elastomer, (b) particles of an null-olefinic thermoplastic polymer having a melting point greater than or equal to 150null C., in an amount of 5 to 30 parts by weight per 100 parts diene elastomer (phr), wherein the mean size by weight of the particles is between 50 nullm and 500 nullm, (c) greater than 60 phr of reinforcing filler, and (d) from 3 to 8 phr of sulphur.