Patent ID: 9353898
Filing Date: 2016-05-31
CPC Classification: F16L,Y10T

Claim Text:
1. A tubular element of a fall pipe used for the purpose of depositing materials underwater from a fall pipe vessel, the tubular element comprises a male and a female coupling part for coupling to another element of the same form, which coupling parts are provided on respectively an outer periphery and inner periphery thereof with at least two annular flanges extending in a peripheral direction of the element and disposed at an axial distance from each other, the flanges comprising a number of segments and interposed recesses, the segments of an upper annular flange being arranged offset relative to the segments of a lower annular flange, wherein for coupling purposes of a first element to a second element, a) segments of a male coupling part of the first element are brought in alignment with recesses of a female coupling part of the second element; b) said segments are furthered through said recesses by axially displacing the first element relative to the second element, and c) said segments are slid under segments of the female coupling part by rotation of the first element relative to the second element; wherein the steps a) to c) are carried out at least twice.