DE1006283B - Method and aid for inflating tubeless tires after they have been placed on the rim - Google Patents

Description

GERMAN

Tubeless tires are known. With them, the air space is partly from the tire cover and partly from the rim formed. A characteristic feature of tubeless tires is therefore the seal between the tire base and the rim, which, however, can be achieved in a satisfactory manner with the appropriate design of the parts mentioned as soon as the tire base is reached has taken its correct and final position on the rim shoulder. But that is difficult first inflation of tubeless tires after placing them on the rim.

In order to be able to push the tire bead over the rim flange, which is larger in diameter, one uses so-called drop center rims. After pulling the tire over the rim, it is relatively easy to to bring one side with your foot into the correct position on the rim shoulder. On the other hand it is difficult to achieve this also with the other side, because with the uninflated tire the distance of Experience has shown that bead heel to bead heel is smaller than the width of the rim mouth. The tire foot of the As a result, the other side protrudes more or less into the rim well, so that air supplied to it Side easily escapes between the tire foot and the rim. This fact makes inflating, des Tire without further aids impossible or makes it difficult to a considerable extent. That's why you have tried by various measures to remedy this deficiency. These measures consisted of that by means of various aids, such as lips, cuffs or the like, a kind of Pre-sealing brought about between the inner surface of the non-resting side of the tire and the rim. However, this is not yet a satisfactory solution, since this measure the production of the Make the tire more expensive and make it more difficult to apply it to the rim.

In contrast, the method and the tools according to the present invention are satisfactory Solution for inflating tubeless tires after they have been placed on the rim.

The new method also works with a pre-seal, but this does not take place within of the tire, but between the outside of the tire and not in contact with the tire standing rim surface. This can be achieved, for example, by using a type of ring collar is pulled under tension over the rim and with its front lying towards the center of the tire Lateral surface places against the outside or flank of the tire and exerts pressure on it. By the tension creates a seal between the boot ring and the rim. Simultaneously This creates a sufficiently tight fit for the Man procedures and aids for inflating

of tubeless tires
after placing the same on the rim

Applicant:

Englebert & Co. G. mb H.,
Aachen-Rothe Erde, Hüttenstr. 7th

Rene Palmans, Grivegnee (Belgium),
has been named as the inventor

cuff -on the rim to avoid its displacement caused by the slightly compressed tire to withstand elastic back pressure. Due to the between the front side surface of the Cuff ring and the pressure prevailing on the tire wall, a sufficient seal is achieved there. If the tire is filled with air, the tire wall is pressed firmly against the cuff ring and gradually pushes it sideways over the edge of the rim as you continue to inflate it. After inflating the cuff ring is only stored with its foremost end on the rim flange and can easily be removed. The procedure is not tied to the cuff ring described, but rather can also be used in other ways, e.g. B. using an inflatable annular tube performed will.

If the cuff ring itself is designed to be inflatable and tubular, its clear diameter can be can be made slightly larger than the rim diameter. By slightly inflating the cuff ring its inner surface rests against the rim with a freely selectable contact pressure.

In order to facilitate the application of the cuff ring to the rim, the inner edge of its front Provide a bevel on the side surface. The cuff ring can serve the same purpose with one from its rear end to its front. Be equipped towards the end of a slightly increasing inner diameter. For sealing on the tire surface it is sufficient if the front side surface of the cuff ring is flat. To improve the seal however, this surface can also have a conical shape or special sealing means exhibit. In particular, it is thought that the inner surface of the cuff ring at its front To provide the end with an annular groove,

609 868/62

whereby a sealing lip is formed. So that the cuff ring is when pushed over the Rim and pressure on the tire flank or during inflation and pushing back do not collapse, it must have a certain rigidity. This can be achieved by suitably selected material and correspondingly dimensioned thickness can be achieved. But you can also use it with stiff insoles made of fabric, metal or other suitable material. The cuff ring can be completely removed consist of elastic material. But you can also make it partially from inelastic material, whereby the necessary stretching and adjustment has to be done by its elastic parts. The width of the Cuff ring is dimensioned so that the tire can be compressed sufficiently without he slides over the rim flange. As a safeguard against such sliding over the rim flange, the inner surface of the cuff ring. its rear end with an annular bead fitted. Since such a cuff ring is often used in repair shops, with the presence of oil residues must be expected, it is provided that it is completely or at least on its surface made of a material known per se which is resistant to the action of oil manufactures.

In the drawings are the method and tools for inflating tubeless tires after placing it on the rim, for example, shows, namely shows

Fig. 1 a tire placed on the rim and a cuff ring before starting to inflate,

Fig. 2 the tire resting on the rim and the cuff ring after inflation,

Fig. 3 to 5 partial views with different embodiments of the cuff ring.

The rim is marked with a, the tire with b and the cuff ring with c .

The rim has the bed a _v, the shoulder a ₂ and the horns a ₃ . It is also equipped with a valve d . The tire is made of. the tread b _v the flanges b ₂ and the feet b _z formed. The mesh ring according to FIGS. 1 and 2 has a substantially rectangular cross-section. Its front side surface C ₁ is conical in shape and provided with a protruding part C ₂ . At. the inner edge of the front side surface C ₁ is a bevel C ₃ . The inner surface c _{4 of} the cuff ring c has an annular bead c ₅ at its rear end.

The formation of the cuff ring c according to Fig. 3 corresponds to its formation according to Figs. 1 and 2 except for the difference that the inner diameter of this cuff ring c of. its rear end increases somewhat towards its front end.

In the case of the cuff ring c according to Fig. 4, the conical front side surface C ₁ does not have a front

jumping part C ₂ provided. In this cuff ring c, however, the bevel C _{3 has} an annular groove C ₆ , as a result of which a sealing lip C _{7 is} formed.

Finally, Fig. 5 shows a hose-shaped cuff ring c with a valve e for the inlet and outlet of air.

Claims (9)

Patent claims: 1. Device for inflating tubeless tires after placing them on the rim, which causes a seal between the outer surface of the free tire flank and the associated rim edge, characterized in that it consists of a loose sealing ring (c), which with its inner surface (c ₄ ) rests under tension on the rim flange (a ₃ ) and experiences a lateral displacement over the rim flange (a ₃ ) when inflated by the expanding tire (&). 2. Sealing ring according to claim 1, characterized in that its inner diameter is slightly smaller than the outer diameter of the rim flange (a ₃ ) and it has a certain elasticity in the radial direction, while it has relatively great rigidity in the axial direction. 3. Sealing ring according to claims 1 and 2, characterized in that its inner diameter increases somewhat from its rear end to its front end. 4. Sealing ring according to claims 1 to 3, characterized in that its inner surface (C ₄ ) has an annular bead (c ₅ ) at its rear end. 5. Sealing ring according to claims 1 to 4, characterized in that the edge between its front side surface. (C ₁ ) and its inner surface (c ₄ ) has a bevel (c ₃ ). 6. Sealing ring according to claims 1 to 5, characterized in that its front side surface (C ₁ ) has a projection (c ₂ ) cooperating with the tire wall (& _2). 7. Sealing ring according to claims 1 to 5, characterized in that its inner surface (c ₄ ) is provided at its front end with an annular groove (c _e ), whereby on its front side surface (C ₁ ) one with the tire wall (b ₂ ) cooperating lip (c ₇ ) is formed. 8. Sealing ring according to claims 1 to 7, characterized in that it is tubular and is designed to be inflatable. 9. sealing ring according to claims 1 to 8, characterized in that it consists entirely or in part of what is known per se, against the action of Oil-resistant material. Cited earlier rights:
German patents No. 944 172, 941 715. 1 sheet of drawings © 609 868/62 4.57