Patent ID: 7143789

Claim:
A high-pressure hose comprising several layers of spirally laid reinforcing plies, wherein the number of reinforcing plies is odd, a lay angle (α k ) of at least one of said plies as measured from a cross section perpendicular to a hose axis is lower than 10 degrees, a number of fibres (N k ) in the at least one of said plies is lower than ABS ( ∑ i = 1 n , i ≠ k ⁢ 3 ⁢ mr i ⁢ N i ⁢ F i ⁢ cos ⁢ ⁢ a 1 r k ⁢ F k ) > N k ( 1 ) where index k refers to the low-angle at least one of said plies, index i is a running index, except the low-angle at least one of said plies, m is a sign function whose value is +1 for left-handed and −1 for right-handed plies, r i and r k are the mean radii of the respective plies, N i and N k are numbers of fibres in the respective plies, F i and F k are the tensile breaking forces of the fibres in the respective plies, n is the number of plies, ABS means absolute value, and all the plies together fulfill the following inequality 0 , 36 ⁢ ∑ j = 1 n ⁢ N j ⁢ F j sin ⁢ ⁢ a j > ∑ j = 1 n ⁢ N j ⁢ F j ⁢ sin ⁢ ⁢ a j > 0 , 3 ⁢ ∑ j = 1 n ⁢ N j ⁢ F j sin ⁢ ⁢ a j ( 2 ) where j is a running index, including the low-angle of the at least one of said plies.