Resilient tires and wheels – Tires – resilient – Wheel securing means
Patent
1996-12-05
1998-11-17
Stormer, Russell D.
Resilient tires and wheels
Tires, resilient
Wheel securing means
1523814, 152520, B60B 2100
Patent
active
058363661
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The subject of the present invention is a method of fitting, on a wheel rim which is in service, an assembly formed, on the one hand, by a radial tire and, on the other hand, by a removable ring for supporting the tread, and more particularly an assembly intended on be fitted on a one-piece wheel rim, at least one of the seating surfaces of which is tapered outwardly.
As described in unpublished French applications FR 92/15061, FR 93/14702 and FR 93/14703, a rolling assembly which exhibits high performance when running at low pressure or even at no pressure includes a rim having, in section through the middle, a first seating surface, the axially outer end of which is on a circle of diameter smaller than the diameter of the circle on which the axially inner end is located (such a seating surface is said to taper outwardly), a bearing surface intended to receive a removable ring for supporting the tread, possibly a well, and a second seating surface which is either identical to or different than the first seating surface, together with a tire of appropriate carcass reinforcement meridian profile having beads of appropriate shapes and a removable support ring.
The nominal diameters of these seating surfaces may be equal, but they are preferably unequal.
French Application FR 92/15061 describes a method of fitting a tire to a wheel rim of the type in question. Said method consists first of all in fitting one bead on the rim and sliding it as far as the well, then inserting the support ring, which is removable and rubbery, in the ovalized state and then sliding it on the cylindrical bearing surface provided for this purpose.
This method limits the axial width of the support, and it is not very easy to carry out in garages equipped with conventional tooling.
SUMMARY OF THE INVENTION
In order to overcome such drawbacks and improve the ease with which the tire, having a first bead and a second bead, and the removable support ring are mounted on a one-piece wheel rim comprising a first wheel rim seating surface and a second wheel rim seating surface, at least the first wheel rim seating surface tapering outwardly, extended axially on the outside by a small hump, and connected axially on the inside to a bearing surface intended to receive the tread support ring, the second wheel rim seating surface having its axially inner end on a circle of diameter greater than the diameter of the circle on which the axially inner end of the first wheel rim seating surface is located, the method of fitting, in accordance with the invention, comprising: the second wheel rim seating surface, then moving it on the wheel rim bearing surface using positioning means, rim.
The fitting of a tire on a wheel rim always begins by placing the tire on one side of the wheel rim and, by convention of language, the bead placed first on the rim is referred to as the second bead, that is to say, the bead which will be mounted on the wheel rim seating surface situated on the side opposite to the side from which mounting is begun, said wheel rim seating surface being the second wheel rim seating surface.
Before it is inserted into the tire, the support ring has to be in a form which allows its insertion; thus the support may be ovalized such that the short axis of the oval obtained after deformation is smaller than the diameter of the tire bead seating surface over which the support has to pass; it may be puckered so that the maximum distance between two of its points is less than the diameter of said tire bead; it may retain its initial shape, it then being necessary to deform said tire bead.
The means for positioning the bead vary depending on the shape of the wheel rim in service and depending on the axial width of the support. If the nominal diameter of the second wheel rim seating surface is equal to the nominal diameter of the first wheel rim seating surface, then the wheel rim generally has a well, and placing the second tire bead onto the wheel rim and moving it along the wheel rim bearing surface, which, for
REFERENCES:
patent: 1944767 (1934-01-01), Stevens
patent: 2347622 (1944-04-01), Tschanz
patent: 3930527 (1976-01-01), French
patent: 4212338 (1980-07-01), Tiemann
patent: 5495881 (1996-03-01), Girard
patent: 5634993 (1997-06-01), Drieux et al.
patent: 5690762 (1997-11-01), Bock et al.
Compagnie Generale des Etablissements Michelin--Michelin & Cie
Stormer Russell D.
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