| 摘要 |
A flexible stretch hose with a wall which comprises a spirally wound profile (1; 11; 21) in a plastic material. Consecutive windings of the profile are secured to each other by means of a weld. The profile comprises, in cross-section, at least one bottom section (2; 12) and at least one rib section (4; 14; 24), wherein the rib section of the profile, relative to the bottom section, also forms a protrusion of the wall of the hose which gives the hose a predetermined hub strength. The profile comprises an unfoldable section (5; 15; 25) provided in order to be unfolded under the influence of a tensile; force in the axial direction of the hose, thereby allowing an extension of the hose, wherein the unfoldable section comprises at least two profile sections lying loosely against each other, which sections are interconnected at one end. |
| 主权项 |
1. A flexible stretch hose with a wall which comprises:
an extruded and spirally wound profile in a plastic material, wherein consecutive windings of the profile are secured to each other by means of a weld, wherein the profile, in cross-section, has at least one bottom section and at least one rib section, wherein the rib section of the profile, relative to the bottom section, forms each time a protrusion of the wall of the hose which provides the hose with a predetermined hub strength, which is the extent to which the hose is resistant to radial compression and springs back to its original shape when a radial compressive force is removed, wherein the profile comprises an unfoldable section provided to be unfolded under the influence of a tensile force in the axial direction of the hose and to thereby allow an extension of the hose, wherein the unfoldable section comprises at least two profile sections lying loose against each other, which sections are interconnected at one end and wherein the hose is stretchable as a result of the unfoldable section up to at least 200% of the length in the unstretched condition. |
