WO2025097206A1

WO2025097206A1 - Hydraulic hose loom assembly

Info

Publication number: WO2025097206A1
Application number: PCT/AU2024/051145
Authority: WO
Inventors: Gert Stephanus Janse Van Vuuren; Brett Cambell McMiles
Original assignee: Elm Global Pte Ltd
Current assignee: Elm Global Pte Ltd
Priority date: 2023-11-06
Filing date: 2024-10-30
Publication date: 2025-05-15
Anticipated expiration: 2026-05-06
Also published as: ZA202501093B

Abstract

A hydraulic hose loom assembly comprises a plurality of hydraulic hoses longitudinally extending through a plurality of thermally insulative sleeves respectively. The plurality of sleeves longitudinally extend through a first protective tubular sheath. The first protective tubular sheath longitudinally extends through a second protective tubular sheath. At least one cap is disposed toward a longitudinal end of the hydraulic hose loom assembly. The cap comprises a polymer body that is provided with a set of hydraulic connector fittings fluidly connected to the hydraulic hoses for operatively connecting to a hydraulic system. At least a longitudinal end section of the second protective tubular sheath is embedded in the polymer body.

Description

HYDRAULIC HOSE LOOM ASSEMBLY

Field

[0001] The present invention relates to a hydraulic hose loom assembly for carrying hydraulic fluids, and a method of forming a hydraulic hose loom assembly.

Background

[0002] Hydraulic hoses are used to carry pressurised hydraulic fluids in hydraulic systems. It is common for hydraulic hoses to be arranged together in a bundle known as a hose loom. Each hose in the loom carries hydraulic fluid to an individual mechanism operated by the hydraulic system. Hydraulic hoses can rupture during use leading to invisible jets of pressurised hydraulic fluid being ejected. These jets are highly hazardous and can lead to persons located nearby being injected with hydraulic fluid.

[0003] The preceding discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the present application.

Summary

[0004] According to the present invention, there is provided a hydraulic hose loom assembly, comprising: a plurality of hydraulic hoses longitudinally extending through a plurality of thermally insulative sleeves respectively; first and second protective tubular sheaths, wherein the plurality of sleeves longitudinally extend through the first of the sheaths, and wherein the first of the sheaths longitudinally extends through the second of the sheaths; and at least one cap disposed toward a longitudinal end of the hydraulic hose loom assembly, wherein the cap comprises a polymer body that is provided with a set of hydraulic connector fittings fluidly connected to the hydraulic hoses for operatively connecting to a hydraulic system, and wherein at least a longitudinal end section of the second of the sheaths is embedded in the polymer body. [0005] A longitudinal end section of the first of the sheaths may also be embedded in the polymer body.

[0006] First and second retaining rings may be provided around longitudinal end sections of the first and second sheaths respectively to secure the sheaths to the hydraulic hose loom assembly.

[0007] The first and second retaining rings may be embedded in the polymer body.

[0008] Respective peripheral ends of the longitudinal end sections of the first and second sheaths may be wrapped over the first and second retaining rings respectively. In such examples, a pair of further retaining rings may be arranged around the respective peripheral ends to secure the peripheral ends against the hydraulic hose loom assembly.

[0009] The cap may comprise a housing containing the polymer body.

[0010] The housing may be secured to the longitudinal end of the hydraulic hose loom assembly by a clamp assembly, wherein the clamp assembly includes an annular gasket arranged around the longitudinal end to prevent ingress of water into the housing.

[0011] Respective end sections of the hydraulic hoses may be embedded in the polymer body.

[0012] The polymer body may comprise polyurethane, polyester or a mixture of polyol and isocyanate.

[0013] The sleeves may comprise aramid fibers. The aramid fibers may be braided.

[0014] The sheaths may be made of polypropylene. [0015] The sheaths may be configured in a telescopical arrangement for allowing the second sheath to receive the first sheath slidably during manufacture of the hydraulic hose loom assembly.

[0016] A waterproof covering may be arranged between the sheaths for preventing ingress of water into the first sheath. The waterproof covering may comprise a layer of polyolefin secured around the first sheath.

[0017] A protective strip may be wound around a longitudinal axis of the second sheath.

[0018] The present invention also provides a method of forming a hydraulic hose loom assembly, wherein the method comprises: inserting a plurality of hydraulic hoses longitudinally through a plurality of thermally insulative sleeves respectively; inserting the plurality of sleeves longitudinally through a first protective tubular sheath; inserting the first sheath longitudinally through a second protective tubular sheath; fluidly connecting a set of hydraulic connector fittings to the hydraulic hoses for operatively connecting to a hydraulic system; arranging a mold for forming a cap toward a longitudinal end of the hydraulic hose loom assembly; injecting polymer filler into the mold and allowing the polymer filler to set to form a polymer body of the cap, such that at least a longitudinal end section of the second sheath is embedded in the polymer body.

[0019] The polymer filler used in the method may comprise polyurethane or a mixture of polyol and isocyanate.

Brief Description of Drawings

[0020] Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which: Figure 1 is a side elevation view of a hydraulic hose loom assembly according to an example embodiment of the invention;

Figure 2 is a cross sectional side elevation view of the hydraulic hose loom assembly;

Figure 3 is a further side elevation view of the hydraulic hose loom assembly, wherein a plurality of hoses, a plurality of sleeves and a pair of protective sheaths of the hydraulic hose loom assembly are shown in telescopically extended conditions;

Figure 4 is a cross sectional end view of the hydraulic hose loom assembly;

Figure 5 is an isometric view of a portion of an individual tubular sleeve containing a portion of an individual hydraulic hose of the hydraulic hose loom assembly;

Figure 6 is an enlarged cross sectional side elevation view of a section of the hydraulic hose loom assembly labelled A in Figure 2;

Figure 7 is an enlarged cross sectional side elevation view of a section of the hydraulic hose loom assembly labelled B in Figure 2;

Figure 8 is an isometric view of a hydraulic hose loom assembly according to a further example embodiment of the invention;

Figure 9 is a side elevation view of the hydraulic hose loom assembly of Figure 8;

Figure 10 is a cross sectional side elevation view of a section of the hydraulic hose loom assembly labelled A-A in Figure 9;

Figure 11 is a cross sectional end view of a section of the hydraulic hose loom assembly labelled B-B in Figure 9; and

Figure 12 is an exploded isometric view of a cap included in the hydraulic hose loom assembly of Figure 8.

Description of Embodiments

[0021] Referring to Figures 1 to 4, an example embodiment of the present invention provides a hydraulic hose loom assembly 10 that comprises a plurality of hydraulic hoses 12 and a plurality of sleeves 14. The plurality of hydraulic hoses 12 longitudinally extend through the plurality of sleeves 14 respectively. The hose loom assembly 10 also comprises a first protective sheath 16 that the hoses 12 and the sleeves 14 longitudinally extend through. The sleeves 14 are made of a thermally insulative material for reducing transmission of heat from the hoses 12 to the protective sheath 16.

[0022] Referring to Figure 4, in the example depicted the hose loom assembly 10 comprises a bundle of ten hydraulic hoses 12 that extend end-to-end along a longitudinal axis of the hose loom assembly 10. The hoses 12 are high pressure hydraulic hoses such as for carrying pressurised oil, or similar hydraulic fluids, along the hose loom assembly 10. The hydraulic hoses 12 are tubular and have various different cross sectional diameters. Each hose 12 extends through an internal lumen of an individual tubular sleeve 14. The sleeves 14 are also tubular and have various different cross sectional diameters, as appropriate, to accommodate the respective hoses 12. The protective sheath 16 is also tubular and, preferably, substantially cylindrical. The bundle of sleeves 14 longitudinally extend end-to-end through the sheath 16.

[0023] The pressurised hydraulic fluid flowing through the hoses 12 can become heated during use. The sleeves 14 keep the hoses 12 spaced apart from each other to prevent heat from building up within the hose loom assembly 10. Furthermore, the thermally insulative material that is used to form each sleeve 14 impedes the transmission of heat from the hoses 12 through to the protective sheath 16. The thermally insulative material is also strong and resilient such that the sleeves 14 operate as a protective barrier to contain any pressurised hydraulic fluid that may leak from ruptured hoses 12. The sleeves 14 are also preferably bendable to ensure that their structural integrity is maintained when the sleeves 14 are flexed. In one example, each sleeve 14 is made of aramid fibers. As used herein, it will be understood that the term “aramid” refers to synthetic aromatic polyamides. In one example, the aramid fibers that form the sleeves 14 comprise para-aramid fibers such as poly-para-phenylene terephthalamide as used in the commercially-available product named Kevlar™ developed by the DuPont chemical company. The sleeves 14 may be formed using braided Kevlar. In another example, the aramid fibers that form the sleeves 14 comprise braided meta-aramid fibers. More particularly, the meta-aramid fibers may comprise poly-meta-phenylene isophthalamide as used in the commercially-available product named Nomex™ also developed by the DuPont chemical company. [0024] The protective tubular sheath 16 is made of a strong and resilient material that operates as a further barrier to contain any pressurised hydraulic fluid that may leak from ruptured sleeves 14 in use. For example, the sheath 16 may be made of polypropylene. In other examples, the sheath 16 may be made of woven nylon. Preferably, the material that is used provides that the sheath 16 complies with Mine Safety and Health Administration (MSHA) standards relating to fire resistivity, blast protection and anti leakage.

[0025] Referring to Figure 1 , a first retaining ring 18 extends around a longitudinal end section of the sheath 16. The retaining ring 18 secures the hoses 12 and the sleeves 14 within the sheath 16. The retaining ring 18 may comprise a band that is made of metal, or other suitable material, that is wrapped around the circumference of the longitudinal end section. A pair of ends of the band may be joined together to form an annular collar extending around the circumference. The two ends may be joined initially by crimping them and then by welding them together. The collar applies a clamping force around the circumference to hold the sheath 16 firmly around the sleeves 14. As illustrated in Figure 7, a peripheral end 60 of the longitudinal end section of the sheath 16 may be wrapped back over the retaining ring 18. A further retaining ring 62 may be arranged on top of, and around, the peripheral end 60. The further retaining ring 62 clamps the peripheral end 60 such that the end 60 is held down against retaining ring 18, thereby securing the end 60 against the hose loom assembly 10. Retaining ring 62 preferably has the same structural configuration as retaining ring 18, and is crimped and welded as per retaining ring 18 to fasten it in position.

[0026] The protective sheath 16 extends longitudinally through a second protective sheath 20 of the hose loom assembly 10. Like the first sheath 16, the second sheath 20 is tubular, and preferably cylindrical, and is made using the same material that is used to make the first sheath 16, such as polypropylene or woven nylon. The two protective sheaths 16, 20 may be configured in a telescopic arrangement such that the first (inner) sheath 16 can be slidably inserted inside the second (outer) sheath 20 when the hose loom assembly 10 is assembled. To illustrate this configuration, the two sheaths 16, 20 are shown at least partially telescopically extended (i.e. , pulled apart) from each other in Figure 3. The respective tubular walls of the sheaths 16, 20 may be approximately 1.5mm thick.

[0027] A waterproof covering 22 may be disposed between the inner protective sheath 16 and the outer protective sheath 20. The covering 22 provides a waterproof barrier to prevent ingress of water and moisture through the inner protective sheath 16. Ongoing exposure to water and moisture can damage and weaken the structural integrity of the sleeves 14 contained inside the sheath 16. The waterproof covering 22 may comprise a layer of polyolefin that is heat shrinked onto the outer cylindrical surface of the inner sheath 16. In addition to providing a waterproof layer, the polyolefin layer 22 reinforces the inner sheath 16 and provides a further protective barrier to contain any pressurised hydraulic fluid that may leak from the sheath 16 should it become ruptured in use.

[0028] A second retaining ring 24 may be provided around a longitudinal end second of the outer sheath 20. The second retaining ring 24 secures the inner sheath 16 within the outer sheath 20 and it has the same structure and operative configuration as the first retaining ring 18. The two retaining rings 18, 24 may be positioned in a spaced arrangement along the longitudinal axis of the hose loom assembly 10. Referring to Figure 7, a peripheral end 64 of the longitudinal end section of the outer sheath 20 may be wrapped over the second retaining ring 24. A further retaining ring 66 may be arranged on top of, and around, the peripheral end 64. The further retaining ring 66 clamps the peripheral end 64 such that the end 64 is held down against retaining ring 24, thereby securing the end 64 against the hose loom assembly 10. Retaining ring 66 preferably has the same structural configuration as retaining ring 24.

[0029] As depicted in Figures 1 and 2, the hose loom assembly 10 also comprises a cap comprising a polymer body 26. The polymer body 26 is cylindrical and is arranged toward a longitudinal end of the hose loom assembly 10. The respective longitudinal end sections of the two protective sheaths 16, 20 are embedded within the polymer body 26. The two retaining rings 18, 24 are also embedded within the polymer body 26 which secures the rings 18, 24 in their spaced arrangement. As best illustrated in Figure 1 , when the hose loom 10 is fully assembled, the peripheral end portions 28 of the sleeves 14 outwardly protrude from the end of the inner protective sheath 16. These end portions 28 are also embedded in the polymer body 26 which secures the sleeves 14 in position relative to the protective sheaths 16, 20. The cap 26 is typically about 500 mm in length.

[0030] The cap’s polymer body 26 may be made of polyurethane and be formed using a thermoset or plastic hot injection moulding process. More particularly, the body 26 may be formed by arranging a pair of mold shells (not shown) around the relevant longitudinal end of the hose loom assembly 10 and then pushing or injecting a hot cast elastomer, such as a hot polymer material or polymer mix, in a molten state directly into one end of the shells. For example, a hot mixture of polyol and isocyanate may be injected into the shells at a high temperature. The hot polymer sets which results in the end sections of the protective sheaths 16, 20, the rings 18, 24 and the sleeve end portions 28 being embedded within the polymer body 26. The body 26 effectively pulls and anchors these parts of the hose loom assembly 10 together. In other examples, the protective sheaths 16, 20 may be arranged such that only the longitudinal end section of the outer sheath 20 is embedded within the polymer body 26. For example, the inner sheath 16 may be contained entirely inside the outer sheath 20 such that only the outer surface of the outer sheath 20 is exposed to the polymer material contained in the body 26.

[0031] Only a single end of the hose loom assembly 10 is depicted in the Figures and it will be appreciated that an opposite end of the hose loom assembly 10 will embody equivalent features.

[0032] Referring now to Figures 8 to 12, a hose loom assembly 30 in accordance with a further embodiment of the invention is disclosed. Except as otherwise specified, the hose loom assembly 30 includes each of the features included in the hose loom assembly 10 depicted in the preceding figures, and like features have been labelled with like reference numerals. More particularly, the hose loom assembly 30 comprises a plurality of hydraulic hoses 12 contained within a plurality of thermally insulative tubular sleeves 14. The hydraulic hoses 12 and the sleeves 14 are contained within a first (inner) protective tubular sheath 16. A first retaining ring 18 extends around a longitudinal end of the inner sheath 16 for securing the hydraulic hoses 12 and the sleeves 14 within the sheath 16. The inner sheath 16 is contained inside a further (outer) protective tubular sheath 20. [0033] A waterproof covering 22 is interposed between the two sheaths 16, 20 which provides a waterproof barrier to prevent water/moisture getting into the inner sheath 16. The waterproof covering 22 preferably comprises a polyolefin layer that is heat shrinked onto the outer surface of the inner sheath 16. A second retaining ring 24 extends around a longitudinal end section of the outer protective sheath 20 for securing the inner protective sheath 16 within the outer protective sheath 20.

[0034] The hose loom assembly 30 also comprises a protective strip 32 that is wound around a longitudinal axis of the outer protective sheath 20. The strip 32 may comprise a length of adhesive tape made of polypropylene that is wound in a spiral along the axis. The strip 32 provides a further protective barrier to prevent hydraulic fluid from being ejected from the hose loom assembly 30. The strip 32 also re-enforces the outer protective sheath 20 and prevents the sheath 20 from being damaged in event that it comes into contact with other objects and surfaces when the hose loom assembly 30 is being transported and installed in use.

[0035] Referring to Figure 10, at least one longitudinal end of the hose loom assembly 30 has a cap that comprises a hollow housing 36 containing a polymer body 38. The polymer material that is used to form the body 38 may be polyurethane, polyester or a mixture of polyol and isocyanate. The housing 36 may be a rigid hollow cylinder that is preferably made of metal, such as stainless steel, or another suitable resilient material. The hollow housing 36 operates as a mold for a polymer filler that is used to form the body 38. The polymer filler may be supplied into the housing 36 using a thermoset or plastic hot injection moulding process. For example, a hot mixture of polyol and isocyanate may be injected into the housing 36 at a high temperature in molten form and allowed to set.

[0036] A set of hydraulic connector fittings 34 are located at a longitudinal end of the housing 36 for operatively connecting the hose loom assembly 30 to a hydraulic system. The connector fittings 34 outwardly extend from the longitudinal end for ease of access. Within the housing 36, a short end section of each hydraulic hose 12 protrudes from the terminal end of the sleeve 14 that covers the hose 12. Each hose end section extends to one of the connector fittings 34 and is fluidly connected thereto. The connector fittings 34 are, preferably, fluidly connected to the hydraulic hoses 12 before the polymer filler is injected into the housing 36.

[0037] The polymer body 38 contained in the housing 36 encapsulates the retaining rings 18, 24 and the ends of the sleeves 14, protective sheaths 16, 20 and polyolefin layer 22 at the relevant end of the hose loom assembly 30. The polymer body 38 also encapsulates the end sections of the hydraulic hoses 12 that extend within the housing 36 between the ends of the sleeves 14 and the connector fittings 34. The embedded retaining rings 18, 24 and are anchored in position by the polymer body 38. An end portion of the protective strip 32 that is wound in a spiral around the outer protective sheath 20 extends into the housing 36. This end portion, which is labeled 40 in Figure 10, is also embedded in the polymer body 38.

[0038] The cylindrical housing 36 is secured to the relevant longitudinal end of the hose loom assembly 10 by a fastener 42. Preferably, the fastener 42 secures an innermost end of the housing 36 to the hose loom assembly 10 and operates as a seal to prevent ingress of water into the housing 36. In the example depicted, the fastener 42 comprises a clamp assembly of an annular configuration. The clamp assembly 42 engages circumferentially around the end portion 40 of the protective strip 32 wound around the longitudinal axis of the hose loom assembly 10. More particularly, the clamp assembly 42 comprises an annular gasket 44 that circumferentially extends around the longitudinal axis and bears against the end portion 40. The gasket 44 is located between the innermost end of the cylindrical housing 36 and the end portion 40. The gasket 44 is secured in this position by a housing 46 of the clamp assembly 42. The gasket 44 may be made of polyurethane and elastically deformable such that it is slightly deformed by the housing 46 when secured in position. The elastic properties of the gasket 44 ensure that a watertight seal is achieved between the gasket 44 and the outer surface of the end portion 40 of the protective strip 32 to prevent ingress of water, moisture and fines into the housing 36. The gasket 44 also advantageously acts as a pillow to provide a flexible buffer between the hose loom 10 and housing 46 when the hose loom 10 flexes in use.

[0039] Referring to Figure 12, the housing 46 of the clamp assembly 42 may comprise a first retaining plate 70 and a second retaining plate 72. The gasket 44 is held clamped between the two plates 70, 72. A circular end plate 74 may be located at a terminal end of the cylindrical housing 36 of the cap. The end plate 74 contains a plurality of through holes for receiving the hydraulic connector fittings 34. The connector fittings 34 are inserted through the holes and secured in position by a set of nuts 76 that mate with cooperating threads provided on the connector fittings 34. The circular end plate 74 is fastened onto the end of the housing 36 by a set of bolts 78. The retaining plates 70, 72 are fastened onto an opposite end of the housing 36 by a further set of bolts 80.

[0040] Referring to Figures 8 and 9, a plurality of brackets 50 are attached along the longitudinal axis of the hydraulic hose loom assembly 30 at spaced intervals. The brackets 50 are used to secure the hose loom assembly 30 to a vehicle or machine that has a hydraulic system that uses the hose loom assembly 30.

[0041] Now that example embodiments of the hydraulic hose loom assembly have been described, it will be apparent that it provides a number of advantages over the prior art, including the following:

(i) The thermally insulative sleeves that cover the hydraulic hoses impede the transmission of heat from the hoses though to the protective sheaths covering the hose loom. This avoids the erosive effects that heat can have on the structural integrity of the protective sheaths.

(ii) The sleeves keep the hydraulic hoses spaced apart from each other, which prevents heat from building up within the hose loom;

(iii) The sleeves prevent the hydraulic hoses from chafing against surrounding parts of the hose loom, including against each other;

(iv) The hose loom uses a limited amount of polymer material (only the cap at each end of the hose loom contains a significant amount of polymer) so the hose loom has a negligible impact on the environment when the hose loom is disposed of;

(v) The hose loom comprises four separate layers of protection to guard against hydraulic fluid bursts; namely, the thermally insulative sleeves, the inner protective sheath, the outer protective sheath and the waterproof covering sandwiched between the two sheaths. This composite structure provides significantly better protection than known covering methods that use single protective sheaths;

(vi) The waterproof (polyolefin) covering prevents ingress of water and moisture into and through the inner protective sheath;

(vii) The polymer body included in each cap encapsulates the two protective sheaths and the two respective retaining rings of the sheaths at the relevant end of the hose loom. The polymer filler material holds/locks the two retaining rings in relative position, and, therefore, secures the two protective sheaths in longitudinal alignment. Furthermore, the polymer filler provides extra protection against hydraulic fluid bursts that may occur from the end sections of the hydraulic hoses that protrude from their sleeves within the cap.

[0042] Any method steps, processes and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed or illustrated, unless specifically identified as an order of performance. It is also to be understood that additional or alternative steps may be employed.

[0043] For the purpose of this specification, the word “comprising” means “including but not limited to”, and the word "comprises" has a corresponding meaning. It is to be understood that, if any prior art is referred to herein, such reference does not constitute an admission that the prior art forms a part of the common general knowledge in the art, in Australia or any other country.

[0044] The above embodiments have been described by way of example only and modifications are possible within the scope of the claims that follow.

Claims

1. A hydraulic hose loom assembly, comprising: a plurality of hydraulic hoses longitudinally extending through a plurality of thermally insulative sleeves respectively; first and second protective tubular sheaths, wherein the plurality of sleeves longitudinally extend through the first of the sheaths, and wherein the first of the sheaths longitudinally extends through the second of the sheaths; and at least one cap disposed toward a longitudinal end of the hydraulic hose loom assembly, wherein the cap comprises a polymer body that is provided with a set of hydraulic connector fittings fluidly connected to the hydraulic hoses for operatively connecting to a hydraulic system, and wherein at least a longitudinal end section of the second of the sheaths is embedded in the polymer body.

2. The hydraulic hose loom assembly according to claim 1 , wherein a longitudinal end section of the first of the sheaths is also embedded in the polymer body.

3. The hydraulic hose loom assembly according to claim 1 or 2, wherein first and second retaining rings are provided around longitudinal end sections of the first and second sheaths respectively to secure the sheaths to the hydraulic hose loom assembly.

4. The hydraulic hose loom assembly according to claim 3, wherein the retaining rings are embedded in the polymer body.

5. The hydraulic hose loom assembly according to claim 3 or 4, wherein respective peripheral ends of the longitudinal end sections of the first and second sheaths are wrapped over the first and second retaining rings respectively.

6. The hydraulic hose loom assembly according to claim 5, wherein a pair of further retaining rings are arranged around the respective peripheral ends to secure the peripheral ends against the hydraulic hose loom assembly.

7. The hydraulic hose loom assembly according to any one of the preceding claims, wherein the cap comprises a housing containing the polymer body.

8. The hydraulic hose loom assembly according to claim 7, wherein the housing is secured to the longitudinal end of the hydraulic hose loom assembly by a clamp assembly that includes an annular gasket arranged around the longitudinal end to prevent ingress of water into the housing.

9. The hydraulic hose loom assembly according to any one of the preceding claims, wherein respective end sections of the hydraulic hoses are embedded in the polymer body.

10. The hydraulic hose loom assembly according to any one of the preceding claims, wherein polymer body comprises polyurethane, polyester or a mixture of polyol and isocyanate.

11. The hydraulic hose loom assembly according to any one of the preceding claims, wherein the sleeves comprise aramid fibers.

12. The hydraulic hose loom assembly according to claim 11 , wherein the aramid fibers are braided.

13. The hydraulic hose loom assembly according to any one of the preceding claims, wherein the sheaths are made of polypropylene.

14. The hydraulic hose loom assembly according to any one of the preceding claims, wherein the first and second sheaths are configured in a telescopical arrangement for allowing the second sheath to receive the first sheath slidably during manufacture of the hydraulic hose loom assembly.

15. The hydraulic hose loom assembly according to any one of the preceding claims, wherein a waterproof covering is arranged between the first and second sheaths for preventing ingress of water into the first sheath.

16. The hydraulic hose loom assembly according to claim 15, wherein the waterproof covering comprises a layer of polyolefin secured around the first sheath.

17. The hydraulic hose loom assembly according to any one of the preceding claims, wherein a protective strip is wound around a longitudinal axis of the second sheath.

18. A method of forming a hydraulic hose loom assembly, wherein the method comprises: inserting a plurality of hydraulic hoses longitudinally through a plurality of thermally insulative sleeves respectively; inserting the plurality of sleeves longitudinally through a first protective tubular sheath; inserting the first sheath longitudinally through a second protective tubular sheath; fluidly connecting a set of hydraulic connector fittings to the hydraulic hoses for operatively connecting to a hydraulic system; arranging a mold for forming a cap toward a longitudinal end of the hydraulic hose loom assembly; injecting polymer filler into the mold and allowing the polymer filler to set to form a polymer body of the cap, such that at least a longitudinal end section of the second sheath is embedded in the polymer body.

19. The method according to claim 18, wherein the polymer filler comprises polyurethane.

20. The method according to claim 18, wherein the polymer filler comprises a mixture of polyol and isocyanate.