| 摘要 |
1,202,094. Flexible hoses. DUNLOP CO. Ltd. 5 Feb., 1969 [7 Feb., 1968], No. 6011/68. Heading F2P. A flexible hose comprises a lining 1 of an elastomeric material, e.g. nitrile rubber, inner and outer reinforcing layers 6, 10 having a layer 8 of cellular material interposed therebetween the outer reinforcing layer 10 withstanding compressive forces on and substantially preventing compression of the cellular material, and an impervious outer covering 15 e.g. of neoprene rubber. In the construction shown the inner reinforcing layer consists of a helically wound steel wire embedded in rubber 5 and the outer reinforcing layer 10 a helical winding of a square section rod formed from a glass fibre/resin composition. The outer reinforcing layer may comprise separate rings of square section. Also incorporated in the hose is a layer 2 of one ply lens weave fabric coated with a polymer compound, six layers 3 of a polymer coated polypropylene cord fabric, a fabric breaker layer 4, a layer 7 of rubberized lens weave fabric a thin rubber layer 9, a winding of closed cell expanded rubber sponge 11 interposed between the windings of the outer reinforcing layer, a rubber layer 12. a polypropylene cord fabric layer 13, and a one-ply lens weave rubberized fabric layer 14. The layers are built up on a mandrel and the layers up to and including layer 7 vulcanized before the winding of the other layers. The finished tube is cured. |
