초록 ▼

A kink-resistant hose construction adapted for conveying fluids under high pressure which is flexible intermediate a central longitudinal axis to a minimum bend radius. The construction includes a thermoplastic core having an inner surface defining the inner diameter of the hose and an outer surface

A kink-resistant hose construction adapted for conveying fluids under high pressure which is flexible intermediate a central longitudinal axis to a minimum bend radius. The construction includes a thermoplastic core having an inner surface defining the inner diameter of the hose and an outer surface, and an innermost reinforcement layer disposed radially circumferentially about the outer surface of the core. The innermost reinforcement layer is formed as a composite of at least one metallic wire element and at least one non-metallic fiber element. The metallic wire element is wound helically in one direction over the outer surface of the core at a predetermined pitch angle measured relative to the longitudinal axis to define a series of first turns. Each of these first tuns is spaced-apart from an adjacent first turn to define successive pairs of first turns each having an interstitial area therebetween. The fiber element, in turn, is wound helically over the outer surface of the core in the same direction and at the same pitch angle as the metallic wire element to define a series of second turns each disposed intermediate a corresponding one of the pairs of the first turns or the wire element. The fiber element substantially occupies the interstitial area between each of the pairs of the first turns of the wire element to thereby prevent the wall of the core from being extruded therebetween as the hose is flexed to its minimum bend radius.

대표청구항 ▼

[ What is claimed is:] [1.] A kink-resistant hose adapted for conveying fluids under high pressure having a select inner and outer diameter and extending to an indefinite length along a central longitudinal axis, said hose being flexible intermediate said longitudinal axis to a minimum bend radius h

[ What is claimed is:] [1.] A kink-resistant hose adapted for conveying fluids under high pressure having a select inner and outer diameter and extending to an indefinite length along a central longitudinal axis, said hose being flexible intermediate said longitudinal axis to a minimum bend radius having an outer diametric component and an inner diametric component, and comprising:a tubular core having an inner surface defining the inner diameter of said hose and an outer surface; andat least one composite reinforcement layer disposed radially circumferentially about the outer surface of said core, said composite reinforcement layer being formed of: (i) at least one metallic wire element wound helically in one direction over the outer surface of said core at a predetermined pitch angle measured relative to said longitudinal axis in a series of first turns each being spaced-apart from an adjacent first turn to define an interstitial area therebetween; and (ii) at least one non-metallic fiber element wound helically in said one direction over the outer surface of said core at said predetermined pitch angle to define a series of second turns each disposed intermediate a corresponding pair of adjacent said first turns, said fiber element being compressed between each said corresponding pair of said first turns,whereby, as said hose is flexed to said minimum bend radius, said fiber element is expandable to substantially occupy the interstitial area between each said corresponding pair of said first turns along the outer diametric component of said bend radius effective to retain said core within said composite reinforcement layer, and said fiber element is further compressible between each said corresponding pair of said first turns along the inner diametric component of said bend radius.