| 摘要 |
1. A multi-purpose locking device for fitting a tyre casing on to a demountable-type wheel comprising : - a rim having two opposite beads in contact with two corresponding beads of the tyre, and - an annular sleeve encircling the rim and having : at least one opening for inflation air, a horizontal dimension, at the level of its base, which is substantially greater than the internal space between the tyre beads, an internal diameter substantially equal to the external diameter at the bottom of the rim, an annular base structure (4, 91) from which at least one projection (5, 6, 11, 66, 67, 68....) extends for bearing the tyre tread in the event of a puncture and is disposed in the direction of the inner surface of the tyre remote from the rim, and at least one continuous peripheral or annular reinforcing frame (13, 115) in the form of a layer or sheet, inter alia textile twisted cords or fabrics or twisted metal wires, and extending substantially over the entire width of the annular structure and disposed at the upper part thereof to make the sleeve non-stretchable, i.e. capable of maintaining a constant diameter corresponding to the position of the reinforcing frame, which device is characterised in that the sleeve (1, 110, 140, 150, 160) is made up of a number of continuous separate annular components which are axially juctaposed and which each comprise at least one projection and a part of the annular base structure (4, 91) so as together to form a single annular structure. |
