Patent ID: 7959190

Claim:
An assembly as part of a particulate solids transport system, comprising an inter-engagement between a first tube and a second tube partly nested within the first tube, the second tube being a flexible tube with an end region annularly supported by a band or cuff, the first tube having an end region thereof provided with an annularly profiled set out, each of the band or cuff and the annularly profiled set out having at least one annular rib directed to the annular rib of each other, and at least one of the band or cuff and the annularly profiled set out having two of the ribs so as to have the rib of the band or cuff and the annularly profiled set out engagingly flanked by the two ribs of the other of the band or cuff and the annularly profiled set out, and the band or cuff being resilient so as to be deformable inwardly of a tube axis thereof to facilitate insertion or removal of the flexible second tube from the first tube and with sufficient return bias to or towards a more relaxed condition such that the rib between a two rib engagement holds the first and second tubes against axial separation from each other, the band or cuff having a resilient cylindrical ring that underlies a profiled ring, the profiled ring providing the ribs of the band or cuff, and the second tube including a flexible sleeve with a fold back portion that encloses the profiled ring and the cylindrical ring.