CORRUGATED TUBULAR JACKET AND DEVICE FOR MANUFACTURE OF SUCH JACKET Russian patent published in 2011 - IPC F16L3/26 

FIELD: machine building.

SUBSTANCE: corrugated tubular jacket consists of two split casings corresponding to external casing and internal casing with similar diametre. One the casings, the external one, has a mouth bigger, than diametre of the jacket which facilitates its putting on the internal casing in a locked position due to flexible deformation. While the mouth of the external casing is being put on, it is subjected to tensile deformation till crossing a point corresponding to diametre of the internal casing, beyond this point the mouth returns to a not-stretched position. Both casings are connected with a pivot. When they rotate around the pivot, one of them is put on another. Also, the mouth of the external casing, which is less, than diametre, passes from the pivot to an opposite end of the casing.

EFFECT: simplified operation of jacket.

8 cl, 14 dwg