COUPLING SLEEVE FOR FUEL LINES; AIRCRAFT, AND SET OF PARTS FOR MANUFACTURE OF ABOVE COUPLING SLEEVE Russian patent published in 2013 - IPC F16L39/00 B64D37/00 

FIELD: machine building; pipeline.

SUBSTANCE: coupling sleeve for connection of fuel lines with double walls includes mounting pipe end installed on one of fuel lines and having an enclosed external surface, for example provided with a groove, and enclosing internal surface, for example provided with a groove. Coupling sleeve also includes a sleeve with double walls, which has enclosing external bushing and enclosed internal connection shaft. Mounting end is partially arranged in the area between enclosing external bushing and enclosed internal connection shaft. The first circumferential seal insulates the area between enclosing internal surface of mounting end and enclosed internal connection shaft of sleeve with double walls. The second circumferential seal that can be coplanar to the first one insulates the area between enclosed external surface of mounting end and enclosing external bushing of sleeve with double walls.

EFFECT: invention improves the connection reliability.

14 cl, 11 dwg