Mechanical device for preventing the sideslip angle of automobiles, and to carry out the propulsion of the boats, sledges, bicycles, or other vehicles, on the glass or on the water, as well as for other uses

摘要

1,140,056. Pneumatic tyres. PNEUMATIQUES, CAOUTCHOUC MANUFACTURE ET PLASTIQUES KLEBER - COLOMBES. 18 April, 1966 [17 April, 1965; 9 Dec., 1965], No. 16969/66. Heading B7C. A radial cord carcass pneumatic tyre comprises a breaker including cross-laid layers 6 of wire cables or cords forming an angle of less than 20 degrees to the mid-plane laid around two or more layers 7 which are not cross-laid and the wire cables or cords of which extend at a substantially equal angle to mid-plane of between 60 degrees and 90 degrees. The axial width of the layers 7 may be between 105% and 85% of that of the tread rolling surface, but preferably the layers 7 subtend at the "centre" of a tyre radial cross-section an angle greater than that subtended by the tread rolling surface. ("Centre" is the intersection between the line of maximum axial width and the mid-plane.) The edges of plies 6 and 7 may be covered by rubber strips 10 and cushion layers 9, the latter having a smaller hysteresis than the tread rubber to reduce heating. The layers 7 are preferably metal cords calendered in rubber of small hysteresis, e.g. 65-70 degrees Shore A, the cords of layers 6 being in rubber of 80 degrees Shore A hardness. The cords of layers 6 may be formed of thirty-eight wires each of 0À15mm. diameter, and those of layers 7 of seven strands of seven wires each of 0À17mm. diameter.