| 摘要 |
A flexible tubular conveyor comprises an outer flexible conduit with a coreless helical screw formed by a plurality of interengaging blade-like elements. A rotary driving member angularly secured to the periphery of the screw-forming elements is formed by a helical spring simultaneously acting to reinforce the screw, the pitch of which may vary along the conduit by elastic deformation due to the load stresses. |
