| 摘要 |
1,192,731. Pneumatic tyres. DUNLOP CO. Ltd. 24 Aug., 1967 [26 Aug., 1966], No. 38312/66. Heading B7C. A pneumatic tyre comprises tread, shoulder, and sidewall portions, the shoulder portion having a ground-contacting surface made up of elements which interengage with themselves or with corresponding elements in either or both of the other portions, the elements having a shape and being disposed relative to one another such that upon application of a force in a direction transverse to a circumferential plane of the tyre, the tyre is locally displaced in and adjacent to the contact area and at least some of the elements in the displaced region interlock with one another to form a local region of increased resistance to said force. In an embodiment, the shoulder of a tyre comprises ribs 1, 6 each having interlocking dove-tail shaped projections and recesses. In addition, rib 6 is provided with similar projections and recesses which interengage with corresponding portions of the sidewall 10. In a modification, interengaging dovetail portions are provided on the tread some of which interengage with themselves while others interengage with dove-tail portions of the shoulder portion, Fig. 5 (not shown). In another embodiment, "key-hole" shaped blocks interengage with correspondingly shaped recesses in shoulder and sidewall portions of a tyre, Figs. 6, 7 (not shown). |
