Refrigerant hose

• US 5,957,164 A
• Filed: 09/10/1998
• Issued: 09/28/1999
• Est. Priority Date: 09/10/1998
• Status: Expired due to Fees

• Current Assignee: Aeroquip Corporation (Eaton Corporation PLC.)
• Original Assignee: Aeroquip Corporation (Eaton Corporation PLC.)
• Inventors: Campbell, Scott
• Primary Examiner(s): BRINSON, PATRICK F
• Application Number:
  US09/150,785
• Time in Patent Office: 383 Days
• Field of Search: 138/137, 138/140, 138/141, 138/124-126, 428/36.2, 428/36.91, 428/36.8
• US Class Current: 138/137
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2262/0269 Aromatic polyamide fibres
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2262/04 Cellulosic plastic fibres, e.g. rayon
• CPC Class Codes: B32B 2262/101 Glass fibres
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material thermoplastic elastomer fibres B32B2262/0215, thermoplastic elastomer particles B32B2264/0221, thermoplastic elastomer foam B32B2266/0292
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/16 comprising polydienes homopolymers or poly-halodienes homopolymers B32B25/12 takes precedence
• CPC Class Codes: B32B 25/18 comprising butyl or halobutyl rubber
• CPC Class Codes: B32B 2597/00 Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 5/026 Knitted fabric
• CPC Class Codes: B60H 1/00571 of liquid ducts, e.g. for coolant liquids or refrigerants
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: F16L 11/085 comprising one or more braided layers in combination with layers of a helically wound core or wire F16L11/088
• CPC Class Codes: F16L 2011/047 with a diffusion barrier layer
• CPC Class Codes: Y10T 428/1386 Natural or synthetic rubber or rubber-like compound containing
• CPC Class Codes: Y10T 428/1393 : Multilayer [continuous layer]

Abstract

This device is a hose for air conditioning purposes that is a barrier hose. The hose comprises an innermost tube of a thermoplastic vulcanizate. The innermost tube of thermoplastic vulcanizate is coextruded with a flexible polyamide barrier material as a second tube. A backing of thermoset rubber is extruded or calendared over the polyamide barrier tube. A reinforcement layer follows which is then covered with an EPDM outer cover.

Claims

1. A refrigerant transporting hose, which is a barrier hose comprising:

an innermost tube formed of at least one thermoplastic vulcanizate;

at least one barrier material positioned radially outwardly of the innermost tube formed of a polyamide material;

at least one backing material positioned radially outwardly of the polyamide inner tube formed of a rubber material;

a reinforcing layer positioned radially outwardly of the inner tube; and

an outer cover positioned radially outwardly of the reinforcing layer made of a rubber material, wherein the innermost tube of the thermoplastic vulcanizate and polyamide barrier material are coextruded without the use of an adhesive.

2. A hose according to claim 1 wherein the thermoplastic vulcanizate is a polyolefin and a rubber selected from the group consisting of EPDM rubber and butyl based rubbers.

3. A hose according to claim 1 wherein the thermoplastic vulcanizate is polypropylene and EPDM rubber.

4. A hose according to claim 1 wherein the polyamide inner tube is straight nylon 6 or a modified nylon 6.

5. A hose according to claim 1 wherein the polyamide inner tube is nylon 6.

6. A hose according to claim 1 wherein the rubber inner tube is EPDM or a halogenated butyl rubber.

7. A hose according to claim 1 wherein the rubber inner tube is bromobutyl rubber.

8. A hose according to claim 1 wherein the reinforcing layer is braided, spiralling or knitted yarns.

9. A hose according to claim 1 wherein the reinforcing layer is made of braided, polyester fibers.

10. A hose according to claim 1 wherein the outer cover is EPDM rubber or a halogenated butyl rubber.

11. A hose according to claim 1 wherein the rubber inner tube is EPDM rubber.

12. A hose according to claim 1 wherein the outer cover is EPDM rubber.

15. A hose according to claim 8 wherein the yarns are made of glass, steel, polyester, aramid, nylon or rayon fibers.

13. A refrigerant transporting hose, which is a barrier hose comprising:

an innermost tube formed of a thermoplastic vulcanizate of polypropylene and EPDM rubber;

at least one inner tube positioned radially outwardly of the innermost tube formed of nylon 6 or nylon 12;

at least one inner tube positioned radially outwardly of the polyamide inner tube formed of EPDM rubber;

a reinforcing layer formed of polyester braid positioned radially outwardly of the rubber inner tube; and

an outer cover positioned radially outwardly of the reinforcing layer made of EPDM rubber, wherein the innermost tube of the thermoplastic vulcanizate and inner tube of nylon are coextruded without the use of an adhesive.

14. A refrigerant transporting hose, which is both a barrier hose comprising:

an innermost tube formed of a thermoplastic vulcanizate of polypropylene and EPDM rubber;

at least one inner tube positioned radially outwardly of the innermost tube formed of nylon 6 or nylon 12;

at least one inner tube position radially outwardly of the polyamide inner tube formed of bromobutyl rubber;

a reinforcing layer formed of polyester braid positioned radially outwardly of the rubber inner tube; and

an outer cover positioned radially outwardly of the reinforcing layer made of EPDM rubber, wherein the innermost tube of the thermoplastic vulcanizate and inner tube of nylon are coextruded without the use of an adhesive.