| 摘要 |
1,185,682. Collapsible tyres. B. F. GOODRICH CO. 31 March, 1967 [1 April, 1966], No. 14789/67 Addition to 1,156,182. Heading B7C. The tyre of the parent specification is modified by the provision of ribs 25 spaced circumferentially around the or each folded wall 18, on one side of the fold, to support the annular tread margin 17 on the underlying bead 12 when the tyre is run in a deflated condition. |
