| 摘要 |
907,277. Tubeless safety tyres. GOODYEAR TIRE & RUBBER CO. Nov. 17, 1960 [April 4, 1960], No. 39484/60. Classes 144 (1) and 144 (2). In a tubeless safety tyre embodying either an internal diaphragm 5 anchored at its edges 6 to the tyre beads 7, or an inner tube, which divides the tyre space into separately inflatable inner and outer compartments 8, 9, the outer periphery of the diaphragm 5 or tube which provides for support of the tyre tread in the event of deflation of the outer compartment is constructed so as to provide at least one radial protuberance in operation sufficient to cause vibration of the wheel and thereby give warning of the deflation. The diaphragm or tube is constructed of stretch-resistant material such as parallel cord plies, and the protuberance may be provided by the use of cords 14 around at least a 120 degree arc, of greater stretchability than those 13 used in the remainder of the diaphragm circumference. Such a construction provides a uniform cross-section when the pressures are equal in the compartments 8, 9 but permits stretch of the diaphragm to the contour 15, on deflation of the compartment 9, over that arc formed by the cords 14. Alternatively, the diaphragm or tube may comprise sections of hard rubber of greater stretchability than cord plies used in the intervening sections, or alternate sections of single and double cord plies. In a further arrangement shown in Fig. 3, the diaphragm 16 is moulded with diametrically opposed permanent depressions 17. The depth of the protuberances in all cases may be from 3/8 to 3/4 of an inch. |
