High pressure compact spiral hydraulic hose

• US 10,458,573 B2
• Filed: 04/10/2017
• Issued: 10/29/2019
• Est. Priority Date: 04/10/2017
• Status: Active Grant

• Current Assignee: ContiTech USA, Inc. (Continental AG)
• Original Assignee: ContiTech USA, Inc. (Continental AG)
• Inventors: Burrowes, Anh, Boche, Craig, Brookes, John Anthony, Kozak, Robert, Yu, Jenny
• Primary Examiner(s): Hook, James F
• Application Number:
  US15/483,770
• Publication Number:
  US 20180292030A1
• Time in Patent Office: 932 Days
• Field of Search: 138126, 138127, 138130, 138133
• CPC Class Codes: B32B 1/08 Tubular products
• CPC Class Codes: B32B 15/02 Layer formed of wires, e.g. mesh
• CPC Class Codes: B32B 15/06 of natural rubber or synthetic rubber
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 2250/04 4 layers
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2262/0223 Vinyl resin fibres
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres
• 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 2262/062 Cellulose fibres, e.g. cotton
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2262/106 Carbon fibres, e.g. graphite fibres
• CPC Class Codes: B32B 2264/0271 Aromatic polyamide particles
• CPC Class Codes: B32B 2264/0278 Polyester particles
• CPC Class Codes: B32B 2264/108 Carbon, e.g. graphite particles
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/54 : Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/732 : Dimensional properties
• CPC Class Codes: B32B 2307/734 : Dimensional stability
• CPC Class Codes: B32B 25/02 : with fibres or particles being present as additives in the layer
• CPC Class Codes: B32B 25/12 : comprising natural rubber
• CPC Class Codes: B32B 25/16 : comprising polydienes homopolymers or poly-halodienes homopolymers B32B25/12 takes precedence
• CPC Class Codes: B32B 2597/00 : Tubular articles, e.g. hoses, pipes
• CPC Class Codes: B32B 5/024 : Woven fabric
• CPC Class Codes: B32B 5/026 : Knitted fabric
• CPC Class Codes: B32B 5/26 : another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B32B 7/03 : with respect to the orientation of features direction of fibres or filaments B32B5/12
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: F16L 11/082 : two layers
• CPC Class Codes: F16L 11/083 : three or more layers

Abstract

A hose includes an inner tube defining a central longitudinal axis there through, and is formed of a vulcanized rubber and a plurality of rod shaped particles orientated substantially parallel with the central longitudinal axis, along with other typical materials. The inner tube has a tube wall thickness (t) of between about 0.5 mm to about 1.5 mm, and the plurality of rod shaped particles is incorporated in an amount of 10% or less by weight. The hose further includes a tie layer directly surrounding the inner tube, a first reinforcement layer surrounding the tie layer, and at least a second reinforcement layer surrounding the first reinforcement layer. An interlayer is interposed between the first and the second reinforcement layer, and the interlayer bonds the first reinforcement layer to the second reinforcement layer. An outside cover surrounds the second reinforcement layer, as well as any additional layers.

Claims

1. A hose comprising:

an inner tube of a single layer construction and defining a central longitudinal axis there through, and comprising a vulcanized rubber and a plurality of rod shaped particles orientated substantially parallel with the central longitudinal axis, wherein the inner tube has a tube wall thickness (t) of between about 0.5 mm to about 1.5 mm, wherein the plurality of rod shaped particles are carbon or graphite particles having carbon atoms which are bonded together in crystals aligned parallel to the long axis of each of the plurality of rod shaped particles, and wherein the plurality of rod shaped particles is incorporated in an amount of 5% or less by weight, based upon total weight of the inner tube;

a tie layer directly surrounding the inner tube;

a first reinforcement layer surrounding the tie layer;

at least a second reinforcement layer surrounding the first reinforcement layer;

an interlayer interposed between the first and the second reinforcement layer, the interlayer bonding the first reinforcement layer to the second reinforcement layer; and

,

a cover surrounding the second reinforcement layer.

2. The hose according to claim 1, wherein the hose has a wall thickness (T), and the tube wall thickness t comprises less than about 25% of the hose wall thickness.

3. The hose according to claim 1, wherein the vulcanized rubber comprises an acrylonitrile butadiene rubber (NBR), a hydrogenated NBR (HNBR), a cross-linked NBR (XNBR), or copolymers and blends thereof.

4. The hose according to claim 1, wherein the plurality of rod shaped particles is incorporated in an amount of from 1% to 4% by weight, based upon total weight of the inner tube.

5. The hose according to claim 1, wherein the rubber has a modulus of at about 12 MPa and a tensile strength of at least about 18 MPa.

6. The hose according to claim 1, wherein each of the first and the second reinforcement layers are spiral wound.

7. The hose according to claim 6, wherein:

the first reinforcement layer is spiral wound in a first winding direction; and

the second reinforcement layer is spiral wound in a second winding direction opposite the first winding direction.

8. The hose according to claim 7, wherein:

the first reinforcement layer is laid at a positive angle relative to the longitudinal axis; and

,

the second reinforcement layer is laid at a negative angle relative to the longitudinal axis.

9. The hose according to claim 8, wherein:

the angle of one of the first and the second reinforcement layer is between about 45° and

65°

; and

the angle of the other one of the first and the second reinforcement layer is between about −

45° and

−

65°

.

10. The hose according to claim 1, wherein:

the first reinforcement layer comprises one or more filaments of a first metal or metal alloy wire; and

,

the second reinforcement layer lines comprise one or more filaments of a second metal or metal alloy wire fiber the same as or different than the first metal or metal alloy wire.

11. The hose according to claim 1, wherein the hose has an inner diameter defined by the inner tube, and wherein the inner diameter is between from about 6 mm to about 51 mm.

12. The hose according to claim 1, wherein the hose is rated for a service pressure of from about 28 MPa to about 55 MPa.

13. The hose according to claim 12, wherein the hose maintains structural integrity after subjected to 1,000,000 pressure pulse cycles at about 47 MPa.

14. The hose according to claim 1, wherein the plurality of rod shaped particles is selected from of or more of carbon particles, aramid particles, and liquid crystalline polymer particles.

15. The hose according to claim 1, wherein particles comprised in the plurality of rod shaped particles have an average length of from about 1.5 mm to about 5 mm, and an average diameter of from about 5 to about 7 microns.

16. A hose comprising:

an inner tube of a single layer construction and defining a central longitudinal axis there through, and comprising a vulcanized rubber and a plurality of rod shaped particles orientated substantially parallel with the central longitudinal axis, wherein the plurality of rod shaped particles are carbon or graphite particles having carbon atoms which are bonded together in crystals aligned parallel to the long axis of each of the plurality of rod shaped particles, wherein the plurality of rod shaped particles is incorporated in an amount of 5% or less by weight, based upon total weight of the inner tube, and wherein particles comprised in the plurality of rod shaped particles have an average length of from about 1.5 mm to about 5 mm, and an average diameter of from about 5 to about 7 microns;

a tie layer directly surrounding the inner tube;

a first reinforcement layer surrounding the tie layer;

at least a second reinforcement layer surrounding the first reinforcement layer;

an interlayer interposed between the first and the second reinforcement layer, the interlayer bonding the first reinforcement layer to the second reinforcement layer; and

,

a cover surrounding the second reinforcement layer;

wherein axial modulus of the inner tube is greater than a modulus of the inner tube in a perpendicular direction to the central longitudinal axis.

17. The hose according to claim 16, wherein the plurality of rod shaped particles is selected from of or more of carbon particles, aramid particles, and liquid crystalline polymer particles.

18. The hose according to claim 16, wherein the vulcanized rubber comprises an acrylonitrile butadiene rubber (NBR), a hydrogenated NBR (HNBR), a cross-linked NBR (XNBR), or copolymers and blends thereof.

19. A hose comprising:

an inner tube of a single layer construction and defining a central longitudinal axis there through, and comprising a vulcanized hydrogenated acrylonitrile butadiene rubber and a plurality of rod shaped particles orientated substantially parallel with the central longitudinal axis, wherein the plurality of rod shaped particles are carbon or graphite particles having carbon atoms which are bonded together in crystals aligned parallel to the long axis of each of the plurality of rod shaped particles, and wherein the plurality of rod shaped particles is incorporated in an amount of 5% or less by weight, based upon total weight of the inner tube;

a tie layer directly surrounding the inner tube;

a first reinforcement layer surrounding the tie layer;

at least a second reinforcement layer surrounding the first reinforcement layer;

an interlayer interposed between the first and the second reinforcement layer, the interlayer bonding the first reinforcement layer to the second reinforcement layer; and

,

a cover surrounding the second reinforcement layer.

20. The hose according to claim 19, wherein the plurality of rod shaped particles is selected from of or more of carbon particles, aramid particles, and liquid crystalline polymer particles.

21. The hose according to claim 19, wherein particles comprised in the plurality of rod shaped particles have an average length of from about 1.5 mm to about 5 mm, and an average diameter of from about 5 to about 7 microns.