Patent ID: 8770233

Claim:
A flexible hose structure, comprising: at least one inner tubular layer ( 2 ) made of a first polymeric material defining a longitudinal axis (L); at least one intermediate meshed reinforcing layer ( 3 ) placed on said inner layer ( 2 ) and made of yarns in a fibrous material; and an optional outer tubular covering layer made of a second polymeric material, wherein said intermediate meshed reinforcing layer ( 3 ) comprises, at least one first series of yarns ( 4 ) defining first chained wales ( 6 , 6 ′, 6 ″, . . . ) and first courses ( 7 , 7 ′, 7 ″, . . . ) with at least said first courses ( 7 , 7 ′, 7 ″, . . . ) arranged with a helical pattern with a first pitch (P 1 ) of predetermined length, and at least one second series of yarns ( 5 ) defining second chained wales ( 8 , 8 ′, 8 ″, . . . ) and second courses ( 9 , 9 ′, 9 ″, . . . ) with at least said second courses ( 9 , 9 ′, 9 ″, . . . ) arranged with a helical pattern with a second pitch (P 2 ) of predetermined length, and wherein said first pitch (P 1 ) is a multiple of said second pitch (P 2 ), and said first wales ( 6 , 6 ′, 6 ″, . . . ) and said second wales ( 8 , 8 ′, 8 ″, . . . ) are reciprocally interlaced with respective meshes ( 10 , 10 ′, 10 ″, . . . : 11 , 11 ′, 11 ″, . . . ) not mutually chained for independently exerting on said inner layer ( 2 ) a radial expansion strength.