STEEL COIL REINFORCING FLEXIBLE TUBE AND MANUFACTURE THEREOF

Japanese Patent JP3908309

B

PROBLEM TO BE SOLVED: To manufacture a flexible tube at a low cost by layering fiber cords at a fixed forming angle to form a flexible tube formed body, reducing the pitch of a steel coil reinforcing wire gradually from the central part to both end parts by compression, and forming a bellows-shaped peak part on a cylindrical shell wall.
SOLUTION: A steel coiled reinforcing wire 7 is disposed at the cross-section central part of a cylindrical shell wall consisting of inner and outer rubber layers 2, 3, and rubber coated fiber reinforcing layers 4, 5 are formed at the inside and the outside of the reinforcing wire 7. In a reinforcing wire 7, its pitch P is reduced gradually from the central part toward both end parts, its cylindrical shell wall between reinforcing wire 7 is formed in bellows-shaped peak part to serve as a flexible part, and a flange 10 is fixed to both the end parts. The rubber coated fiber reinforcing layers 4, 5 are formed by winding and layering fiber cords, for example, 2 plys each, 4 plys in total around the surface of the inner surface rubber layer 2, the surface of the reinforcing wire 7 and an intermediate rubber layer 6 so that fiber directions may cross alternately at a smaller forming angle than the balancing angle of the hose.

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Yokobori, Shizuo
Tsujimoto, Masami

JP1996000304117

January 26, 2007

October 29, 1996

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TOYO TIRE & RUBBER CO LTD

B65H55/00; F16L11/11; F16L1/024; F16L11/08; F16L23/024; F16L23/026; F16L23/028; B65H55/00; F16L11/11; F16L1/024; F16L11/08; F16L23/00; (IPC1-7): F16L11/11; B65H55/00; F16L1/024; F16L11/08; F16L23/026; F16L23/024; F16L23/028

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