Formed hose couplings

• US 4,330,142 A
• Filed: 01/10/1980
• Issued: 05/18/1982
• Est. Priority Date: 01/10/1980
• Status: Expired due to Term

• Current Assignee: Automotive Fluid Systems, Inc.
• Original Assignee: Fayette Tubular Products, Inc. (Totalenergies Se)
• Inventors: Paini, William R.
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US06/111,118
• Time in Patent Office: 859 Days
• Field of Search: 285/256, 285/259, 285/253, 285/382, 29/508, 29/516, 29/521
• US Class Current: 285/256
• CPC Class Codes: B21C 37/20 Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
• CPC Class Codes: B21D 17/02 by pressing grooving or notching of bolts, studs, or the like B21K1/54
• CPC Class Codes: B21D 39/04 of tubes with tubes; of tubes with rods crimped pipe joints as such F16L13/14
• CPC Class Codes: F16L 33/2076 by plastic deformation

Abstract

A deformable metal or plastic tube, the nipple end of which is provided with a plurality of circumferential ribs or grooves and a plurality of aligned longitudinal projections to provide a rough surface over which a resilient rubber or plastic end section of a flexible hose is placed and inwardly compressed against said roughened surface by a sleeve or band to form a fluid-tight seal between the hose and the tube. The grooves or ribs on the nipple portion of the tube are formed by a plurality of radially inwardly pressing dies surrounding the tube on a mandrel. These dies not only reduce the diameter of the nipple but also form aligned rows of projections on the outer surface of the tube by extrusion of the metal between the sides of adjacent dies. One or more and preferably two compressions of the dies are made in different angular positions of the tube. The nipple portion is defined by a previously outwardly pushed bead flange inwardly from the end of the tube. The roughened portion of the tube may also have an outwardly flanged open end. The flexible hose is placed so that its end abuts against the bead. Preferably, a ferrule surrounding the hose is crimped radially inwardly to compress the house around the roughened portion of the nipple, and this ferrule preferably also has an inwardly extending end flange which engages or seats against the bead to protect the end of the hose.

Claims

1. A serviceable-type hose coupling for a tube comprising:

(A) a tubular nipple end on the tube over which a section of said hose snugly fits, said nipple having;

(a) a plurality of parallel segmented circumferential alternate larger and smaller diameter portions, said portions having connecting walls diverging outwardly at an angle between about 50° and

70°

from said smaller diameter portions,

(b) a plurality of at least three equally angularly spaced axially extending rows of outward projections, at least one projection extending from each of said larger diameter portions,

(c) and a radially outwardly extending circumferential flange bead at the inner end of said nipple,

(B) a compressible hose snugly fitting over said nipple and against said bead, and

(C) a ferrule fitting over said hose and having a radial end flange against the end of said hose and abutting against said bead of said nipple, said ferrule being radially inwardly compressed around said hose to urge said hose against said larger and smaller diameter portions of said nipple and to urge said hose axially against the inside of said flange of said ferrule which in turn is urged against said bead to form a seal to protect the end of said hose.

2. A hose coupling according to claim 1 wherein said rows of outward projections are in each of said smaller diameter portions.

3. A hose coupling according to claim 1 wherein each of said outward projections are along the sides between each of said smaller and larger diameter portions.

4. A hose coupling according to claim 1 wherein said outward projections are over at least a portion of each larger and smaller diameter portion.

5. A hose coupling according to claim 1 wherein said outward projections extend continuously longitudinally throughout all said smaller and larger diameter portions.

6. A hose coupling according to claim 1 wherein said nipple has a type of polygonal shaped radial cross-section for its outer roughened surface.

7. A hose coupling according to claim 1 wherein said flange portion of said ferrule has a seat portion for said bead.

8. A hose coupling according to claim 1 wherein said nipple has an outwardly flared flange at its open outer end from the tube.

9. A serviceable-type hose coupling for a tube comprising:

(A) a tubular nipple end on the tube having a radially outwardly extending bead at its inner and tube end, and a plurality of circumferential alternate larger and smaller diameter portions and a plurality of axially aligned equally angularly spaced rows of radial outward projections, at least one of said projections extending from each of said larger diameter portions,

(B) a compressible hose snugly fitting over said nipple and against said bead, and

(C) a ferrule fitting over said hose and having a radial end flange against the end of said hose and abutting against said bead of said nipple, said ferrule being radially inwardly compressed around said hose to urge said hose against said projections and said larger and smaller diameter portions of said nipple and to urge said hose axially against the inside of said flange of said ferrule which in turn is urged against said bead to form a seal and to protect the end of said hose.

10. A hose coupling according to claim 9 wherein said flange portion of said ferrule has a seat portion for said bead.

11. A hose coupling according to claim 9 wherein said nipple has a type of polygonal shaped radial cross-section for its outer roughened surface.