초록 ▼

A hose having stable length under pressure comprises an internal leak tightness sheath, and armoring consisting of at least two pairs of layers of helically wound wires, the two layers of the same pair being made of identical wires laid at the same sheathing angle but in the opposite direction, and

A hose having stable length under pressure comprises an internal leak tightness sheath, and armoring consisting of at least two pairs of layers of helically wound wires, the two layers of the same pair being made of identical wires laid at the same sheathing angle but in the opposite direction, and an external protective sheath. All the wires are laid at one of two sheathing angles, one less than 55°the other greater than 55°; the wires of at least one pair of layers exhibit one sheathing angle between 40°and 53°, and the wires of at least one other pair of layers exhibit a second sheathing angle between 57°and 70°.

대표청구항 ▼

A hose comprising: an internal leak tightness sheath, an external protective sheath, and an armoring between said sheaths, said armoring comprising at least two pairs of layers of helically wound wires, each of said pair of layers comprising first and second layers made up of identical wires laid at

A hose comprising: an internal leak tightness sheath, an external protective sheath, and an armoring between said sheaths, said armoring comprising at least two pairs of layers of helically wound wires, each of said pair of layers comprising first and second layers made up of identical wires laid at the same helix angle, but in opposite helical directions, wherein all the wires are laid at one of two helix angles, one less than 55°(aa) and the other greater than 550°(aa), the wires of at least one of said pairs of layers exhibiting the same helix angle aa such that 40°≤aa ≤53° and the wires of at least one other pair of layers exhibiting the same helix angle aa such that 57°≤aa 70°″, said layers being arranged to satisfy the relation [Figure] where: [Figure] and [Figure] where: na is the number of pair of layers wound at angle aa, nb is the number of pair of layers wound at angle ab, (ka); and (kb), respectively are the rigidity at axial elongation of the wires of each of the pairs of armoring layers i and j, respectively, wound at angles aa and ab, respectively, k being defined by k =T / eek is the average diameter of the layer of wires, ak is the sheathing angle, and Nk is the number of sheathing wires; Di is the inside diameter of the first layer of interior sheathing wires; Dma is the average diameter of na pairs of sheathed layers at angle aa; and Dmb is the average diameter of nb pairs of sheathed layers at angle ab.