GB2202598A - Extruded hose end fitting - Google Patents

Extruded hose end fitting Download PDF

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Publication number
GB2202598A
GB2202598A GB08706903A GB8706903A GB2202598A GB 2202598 A GB2202598 A GB 2202598A GB 08706903 A GB08706903 A GB 08706903A GB 8706903 A GB8706903 A GB 8706903A GB 2202598 A GB2202598 A GB 2202598A
Authority
GB
United Kingdom
Prior art keywords
tube
ferrule
hose end
end fitting
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08706903A
Other versions
GB2202598B (en
GB8706903D0 (en
Inventor
David Bishop
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB8706903A priority Critical patent/GB2202598B/en
Publication of GB8706903D0 publication Critical patent/GB8706903D0/en
Publication of GB2202598A publication Critical patent/GB2202598A/en
Application granted granted Critical
Publication of GB2202598B publication Critical patent/GB2202598B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/20—Undivided rings, sleeves or like members contracted on the hose or expanded in the hose by means of tools; Arrangements using such members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A hose end fitting (1) comprising a cylindrical tube (2) and a ferrule (4) extending from an annular flange (3) to co-axially overlie part (5) of the tube. Both tube parts, the ferrule and the flange are formed as a single extrusion using an impact extrusion into three moulding cavities. <IMAGE>

Description

HOSE END FITTINGS This invention relates to hose end fittings such as may, for example, be used in automotive air conditioning systems.
A known hose end fitting comprises a length of tube, having an outside diameter to match the bore of a given hose, and a ferrule, having an internal diameter to match the outside diameter of the hose and an inturned, annular flange at one end to match with the outside tube diameter. The ferrule is clinched or swaged so that the flange fits tightly about the tube, the hose end is fitted about the tube and within the ferrule and the ferrule is then crimped or swaged to trap the hose end between the ferrule and the tube; the seal being between the hose and the tube. If this seal is not perfect, leakage can occur between the ferrule flange and the tube. Also, the tube is distorted by the flange when the ferrule is clinched about the tube and the clinching operation forms a crevice between the flange and the tube; which crevice is liable to corrosion.
An alternative hose end fitting has a similar ferrule brazed or. otherwise fastened to the tube. This eliminates the leakage path between the ferrule and the tube and makes use of the additional seal between the ferrule and the hose. However, the brazing or like fastening of the ferrule is a separate operation; raising the cost of the fitting and still providing a potential leakage path if the joint is not perfect.
It is an object of the present invention to provide a hose end fitting that overcomes the disadvantages of the above described fittings.
According to the present invention, a hose end fitting comprises a tube and a ferrule extending from an annular flange to coaxially overlie part of the tube; the tube, the ferrule and the flange being formed as an integral whole. The hose end fitting thus has an integral ferrule which both eliminates a possible leakage path, the crevice of a clinched ferrule and a manufacturing step.
Also according to the present invention, a method of manufacturing a hose end fitting, in the form of a tube with a ferrule extending from an annular flange to coaxially overlie part of the tube, comprises extruding the tube, ferrule and flange as an integral whole.
In a preferred method, the hose end fitting is formed in an impact extrusion press from a slug of impactable metal; the press tooling being designed to permit the tube to extrude from the slug in opposite directions, the flange to be formed by part of the slug and the ferrule to extrude from the slug coaxially over one of the tubes.
Impact extrusion or cold forging the hose end fitting gives the additional advantages of high material utilisation, productivity and energy efficiency and strength.
The above and other features of the present invention are illustrated, by way of example, in the Drawing which is an axial section of a hose end fitting.
As shown, the hose end fitting 1 consists of a cylindrical tube 2 with, part-way along the length of the tube, an integral radially extending flange 3. The flange is formed with and closes the end of a cylindrical ferrule 4 that coaxially overlies a part 5 of the tube.
The hose end fitting can be manufactured by impact extrusion of, for example, 6063 aluminium alloy. Slugs or blanks of the alloy are produced by sawing lengths from extruded bar which would normally be in "O" or "M" condition. The blanks are then degreased and tumbled in a suitable lubricant such as zinc stearate, a dry powder that adheres to the surface of the blank.
Each blank is then pre-formed ready for impacting and blanks are then fed automatically into the die of a mechanical or hydraulic impact extrusion press where the blank is struck by the press punch and material extrudes into three separate tooling cavities simultaneously to form the hose end fitting. The formed fittings are then ejected on the return stroke of the press. If required, final trimming of the ferrule and tube ends is then carried out. Finally, the fittings are degreased.
Production rates from a single die cavity press would normally be 40 to 60 components per minute.
The fittings can be used as produced, however impact extrusion does workharden the material; the use of 6063 alloy allows the formed fittings to be heat treated if necessary.
Any impactable aluminium alloy, pure aluminium or other impactable metal could be used.
The free end 6 of the tube 2 is subsequently formed to suit any of the multiplicity of end details currently used for hose fittings. This could either be part of or subsequent to and separate from the main manufacturing process.
In a modification to the manufacturing process, the fittings may be extruded in two or more stages; part-formed fittings being transferred to other presses or dies for further extrusion.
In an unillustrated embodiment of the fitting, the radial flange is axially thickened to enable a radial bore communicating with the interior of the tube to be formed. Such a bore would allow auxilliary devices such as bleed or venting valves to be readily attached to the fitting.

Claims (7)

1. A hose end fitting comprising a tube and a ferrule extending from an annular flange to coaxially overlie part of the tube; the tube, the ferrule and the flange being formed as an integral whole.
2. A hose end fitting substantially as described with reference to or as shown by the Drawing.
3. A method of manufacturing a hose end fitting, in the form of a tube with a ferrule extending from an annular flange to coaxially overlie part of the tube, comprises extruding the tube, ferrule and flange as an integral whole.
4. A method as claimed in claim 3, wherein the hose end fitting is formed in an impact extrusion press from a slug of impactable metal; the press tooling being designed to permit the tube to extrude from the slug in opposite directions, the flange to be formed by the slug and the ferrule to extrude from the slug coaxially over one of the tubes.
5. A method as claimed in claim 4, wherein the impactable metal is a heat treatable aluminium alloy.
6. A method as claimed in claim 4 or claim 5, wherein the press tooling has three separate cavities into which material extrudes simultaneously when the slug is struck by the press punch; to form both tube parts and the flange and ferrule.
7. A method of manufacturing a hose end fitting substantially as described.
GB8706903A 1987-03-24 1987-03-24 Hose end fittings Expired - Lifetime GB2202598B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8706903A GB2202598B (en) 1987-03-24 1987-03-24 Hose end fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8706903A GB2202598B (en) 1987-03-24 1987-03-24 Hose end fittings

Publications (3)

Publication Number Publication Date
GB8706903D0 GB8706903D0 (en) 1987-04-29
GB2202598A true GB2202598A (en) 1988-09-28
GB2202598B GB2202598B (en) 1991-05-29

Family

ID=10614482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8706903A Expired - Lifetime GB2202598B (en) 1987-03-24 1987-03-24 Hose end fittings

Country Status (1)

Country Link
GB (1) GB2202598B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218018A (en) * 1989-12-29 1993-06-08 Kansai Paint Co., Ltd. Hydroxyl and carboxyl groups-containing resin with alicyclic polyepoxide
EP0609027A1 (en) * 1993-01-27 1994-08-03 Draftex Industries Limited Protective end piece for tubes
GB2311111A (en) * 1996-03-13 1997-09-17 Hitachi Cable Hose coupling and method of making such

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29905009U1 (en) 1999-03-18 1999-06-10 Veritas Gummiwerke AG, 63571 Gelnhausen Hose connection

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363836A (en) * 1930-12-23 1931-12-31 Gas Light & Coke Co Improvements in or relating to connectors or coupling devices for flexible tubing
GB507901A (en) * 1938-10-26 1939-06-23 Albert Reginald Willmott Improvements in or relating to flexible tubular connections
GB637994A (en) * 1946-05-07 1950-05-31 Walter Arthur Melsom Improvements in and relating to flexible hose couplings
GB839262A (en) * 1957-09-05 1960-06-29 Avica Equip Improvements relating to flexible metal pipe units and the manufacture thereof
GB885594A (en) * 1959-10-22 1961-12-28 Compoflex Co Ltd Improvements in or relating to the manufacture of fluid-conveying hose
GB889092A (en) * 1959-03-26 1962-02-07 Weatherhead Co Hose and hose end assembly and method of making same
GB998128A (en) * 1962-05-10 1965-07-14 Abboflex Ltd Improvements in or relating to flexible conduits
GB1249839A (en) * 1968-12-21 1971-10-13 Luigi Bagnulo Electrically insulating joint for metallic pipe lines
GB1258560A (en) * 1970-01-16 1971-12-30
GB1266535A (en) * 1969-03-14 1972-03-08
GB1268065A (en) * 1968-09-06 1972-03-22 American Biltrite Rubber Co High pressure hose and coupling
GB1336376A (en) * 1970-11-19 1973-11-07 Omp Officine Meccaniche Pasott Method of making a connector for hydraulic circuit ducts
GB2147073A (en) * 1983-09-05 1985-05-01 Toyoda Gosei Kk Coupling hoses

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363836A (en) * 1930-12-23 1931-12-31 Gas Light & Coke Co Improvements in or relating to connectors or coupling devices for flexible tubing
GB507901A (en) * 1938-10-26 1939-06-23 Albert Reginald Willmott Improvements in or relating to flexible tubular connections
GB637994A (en) * 1946-05-07 1950-05-31 Walter Arthur Melsom Improvements in and relating to flexible hose couplings
GB839262A (en) * 1957-09-05 1960-06-29 Avica Equip Improvements relating to flexible metal pipe units and the manufacture thereof
GB889092A (en) * 1959-03-26 1962-02-07 Weatherhead Co Hose and hose end assembly and method of making same
GB885594A (en) * 1959-10-22 1961-12-28 Compoflex Co Ltd Improvements in or relating to the manufacture of fluid-conveying hose
GB998128A (en) * 1962-05-10 1965-07-14 Abboflex Ltd Improvements in or relating to flexible conduits
GB1268065A (en) * 1968-09-06 1972-03-22 American Biltrite Rubber Co High pressure hose and coupling
GB1249839A (en) * 1968-12-21 1971-10-13 Luigi Bagnulo Electrically insulating joint for metallic pipe lines
GB1266535A (en) * 1969-03-14 1972-03-08
GB1258560A (en) * 1970-01-16 1971-12-30
GB1336376A (en) * 1970-11-19 1973-11-07 Omp Officine Meccaniche Pasott Method of making a connector for hydraulic circuit ducts
GB2147073A (en) * 1983-09-05 1985-05-01 Toyoda Gosei Kk Coupling hoses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218018A (en) * 1989-12-29 1993-06-08 Kansai Paint Co., Ltd. Hydroxyl and carboxyl groups-containing resin with alicyclic polyepoxide
EP0609027A1 (en) * 1993-01-27 1994-08-03 Draftex Industries Limited Protective end piece for tubes
TR27786A (en) * 1993-01-27 1995-08-28 Draftex Ind Ltd Protective end piece for hoses.
GB2311111A (en) * 1996-03-13 1997-09-17 Hitachi Cable Hose coupling and method of making such
GB2311111B (en) * 1996-03-13 2000-03-15 Hitachi Cable A method of maufacturing a hose coupling
CN1087411C (en) * 1996-03-13 2002-07-10 日立电线株式会社 Hose coupling, intermediate blank materiul for making the same, and hose assembly using the same

Also Published As

Publication number Publication date
GB2202598B (en) 1991-05-29
GB8706903D0 (en) 1987-04-29

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930324