Patent ID: 7264280

Claim:
A flexible tube for an exhaust pipe of an automobile comprising: a bellows member ( 10 ) formed in the shape of a hollow cylinder and corrugated to have alternate ridges ( 11 ) and furrows ( 12 ) along its outer periphery; outer braids ( 20 ) woven at predetermined angles and provided to enclose the bellows member ( 10 ) keeping a predetermined distance from the outer periphery of the bellows member ( 10 ); fixing caps ( 30 ) fitted onto both side ends of the outer braids ( 20 ) respectively, so that both side ends of the outer braids ( 20 ) can be fixed around those of the bellows member ( 10 ); and a spring member ( 40 ) having elasticity and provided on a circumferential surface of the outer braids ( 20 ) to be closely contacted thereto, wherein the bellows member ( 10 ) has lower ridges ( 13 ) in its center as well as regular ridges ( 11 ) on both sides thereof, wherein the lower ridges ( 13 ) include a central lowest ridge ( 13 a ), and centering around the lowest ridge ( 13 a ), they become higher symmetrically towards both sides of the bellows member ( 10 ).