Hose connection with compressed sleeve and expanded nipple
First Claim
1. A high pressure hose connection for connecting a hose with a nipple structure, comprising a main portion, a connecting portion fixed to said main portion and a nipple portion connected to the main portion by way of a conical portion axially spaced from the main portion and of reduced external diametric dimension relative to said main portion, said nipple portion being provided with axially spaced, externally projecting rib means whose external surfaces are rounded off to avoid any sharp edges, a tubular sleeve-like member provided with radially inwardly extending grooves provided in the originally cylindrical configuration of the sleeve-like member which is of substantially constant thickness over its axial length, said sleeve-like member being so located as to be substantially coextensive with the axially spaced rib means, said sleeve-like member being fixed to said nipple portion and, in its original cylindrical configuration, being of such inner diametric dimension relative to the normal outer diameter of the hose that the hose disposed in the space between the external surfaces of the nipple portion and the internal surfaces of the sleeve-like member is held fast against axial movement under the pressure of a fluid medium flowing therethrough by the cooperating anchoring forces of the rib means and of the grooves as a result of radial expansion of the nipple portion together with a part of the conical portion along its inner diameter and as a result of the subsequent forming of the annular grooves into the outer surface of the sleeve-like member.
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Accused Products
Abstract
A hose connection for high pressure installations and a method for making the same in which a nipple provided with externally projecting beads or ribs of annular configuration is initially internally expanded to substantially the inner diameter of the hose by an expanding tool while the hose is constrained against radially outward movement by a cylindrical sleeve-like member having a smooth internal surface. The sleeve-like member secured to the nipple is subjected to at least one subsequently realized inwardly extending deformation which may be made by a crimping tool; in case of annular rolled-in grooves, the latter are preferably so arranged that the deepest point of the annular grooves are located between peaks of adjacent beads or ribs. By appropriately coordinating the expansion of the nipple and subsequent contraction of the sleeve-like member to the dimension and characteristics of the hose material, a high pressure connection can also be realized for a hose reinforced by a metallic sheath which avoids any significant dislocations and structural changes in the reinforcing sheath.
35 Citations
28 Claims
- 1. A high pressure hose connection for connecting a hose with a nipple structure, comprising a main portion, a connecting portion fixed to said main portion and a nipple portion connected to the main portion by way of a conical portion axially spaced from the main portion and of reduced external diametric dimension relative to said main portion, said nipple portion being provided with axially spaced, externally projecting rib means whose external surfaces are rounded off to avoid any sharp edges, a tubular sleeve-like member provided with radially inwardly extending grooves provided in the originally cylindrical configuration of the sleeve-like member which is of substantially constant thickness over its axial length, said sleeve-like member being so located as to be substantially coextensive with the axially spaced rib means, said sleeve-like member being fixed to said nipple portion and, in its original cylindrical configuration, being of such inner diametric dimension relative to the normal outer diameter of the hose that the hose disposed in the space between the external surfaces of the nipple portion and the internal surfaces of the sleeve-like member is held fast against axial movement under the pressure of a fluid medium flowing therethrough by the cooperating anchoring forces of the rib means and of the grooves as a result of radial expansion of the nipple portion together with a part of the conical portion along its inner diameter and as a result of the subsequent forming of the annular grooves into the outer surface of the sleeve-like member.
- 16. A high pressure hose connection for connecting a hose with a nipple structure that comprises a main portion, a connecting portion fixed to said main portion and a nipple portion connected to the main portion by way of a conical portion axially spaced at least in large part from the main portion and of reduced external diametric dimension relative to said main portion, characterized in that said nipple portion is provided with axially spaced, externally projecting rib means whose external surfaces are rounded off to avoid any sharp edges, a tubular sleeve-like member made from a substantially cylindrical part of essentially constant thickness and smooth internal surfaces and provided with at least one radially inwardly extending deformation, said sleeve-like member being so located as to be substantially coextensive with the nipple portion, said sleeve-like member being fixed to said nipple portion and, in its original cylindrical configuration, being of such inner diametric dimension relative to the normal outer diameter of the hose that the hose disposed in the space between the external surfaces of the nipple portion and the internal surfaces of the sleeve-like member is held fast against axial movement under the pressure of a fluid medium flowing therethrough by the cooperating anchoring forces of the rib means on the nipple portion and of the inwardly extending deformation in the sleeve-like member as a result of initial radial expansion of the nipple portion and part of the conical portion and subsequent compression in the outer surface of the sleeve-like member.
Specification