Patent ID: 6973724

Claim:
Method of manufacturing a tubular element, especially a motor-vehicle front crosspiece ( 1 ), able to constitute at least one air duct ( 2 , 3 , 4 ), of the type comprising at least two half-shells ( 5 , 6 ) assembled onto two facing outer longitudinal edges ( 5 a , 6 a – 5 b , 6 b ), by local mechanical-linking means ( 7 ), characterised in that it further incorporates the production of leaktightness means ( 8 ) of the said tubular means ( 1 ) which consist of at least one continuous, convex or concave deformation formed simultaneously on each of the facing outer longitudinal edges ( 5 a , 6 a – 5 b , 6 b ) of the two half-shells ( 5 and 6 ), in the vicinity of the mechanical-linking means ( 7 ).