GB1563652A

GB1563652A - End fitting for hose

Info

Publication number: GB1563652A
Application number: GB899077A
Authority: GB
Original assignee: SKOTCHINSKY INST GORNOGO DELA; Taurus Gumiipari Vallalat; Banyaszati Kutato Intezet
Current assignee: SKOTCHINSKY INST GORNOGO DELA; Taurus Gumiipari Vallalat; Banyaszati Kutato Intezet
Priority date: 1976-03-10
Filing date: 1977-03-03
Publication date: 1980-03-26
Also published as: AT359792B; JPS52142324A; HU173802B; DD128767A5; YU63277A; JPS589878B2; CS189046B2; DE2710830A1; FR2343959B1; FR2343959A1; YU40668B; ATA138977A

Description

(54) END FITTING FOR HOSE (71) We, BANYASZATI KUTATO INTEZET of 2, Mikoviny utca, 1037 Budapest, Hungary and TAURUS GUMIIPARI VALLALAT of 17 Kerepesi ut 17, 1087 Budapest, HUNGARY, both bodies corporate organized unde the laws of Hungary, and SKOTCHINSKY INSTITUT GORNOGO DELA of Ljubertsy, 140004.

Moscow, Soviet Union, a body corporate organized under the laws of the Soviet Union, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed to be particularly described in and by the following statement: The Invention concerns an end fitting for a hose having a plurality of discrete. individual tubes or hose elements for conveying fluids, especially pressurized fluids, within it. Hereafter, such a hose will be referred to as a "multi-channel hose", a term not intended to encompass a single hose having a plurality of fluid passageways.

End fittings for multi-channel hoses are known which contain means suitable for accommodating and positioning coupling elements for the individual hoses, said means consisting of a positioning member and a guiding plate respectively extending perpendicularly to the longitudinal axes of the individual hoses and provided with apertures for receiving the hose coupling elements, see e.g. Soviet Patent Specification No. 306,309.

This known construction has several drawbacks. it is very intricate. It requires a separate source of pressurised medium for pressing the positioning member and the guioding plate to each other and to a counterpiece coupled to the end fitting and one of the channels has to be taken up with conveying the pressured medium. For a piston-like operation the co-operating surfaces have to be machined accurately and adequate sealing must be provided. In the event of a fault in the end fitting, the necessary dismantling is very cumbersome and during it to the groove receiving the resilient ring can easily damage the sealing element. In conditions prevailing in mines, contamination of the co-operating (engaging) surfaces also represents a problem.

An aim of the invention is to eliminate or reduce the above-mentioned drawbacks and to provide end fittings for a multi-channel hose wherein the positioning of the coupling elements of individual hose members and their securing relative to the body of the fitting can take place in considerably simpler yet more reliable fashion.

The above aim is sought to be achieved by providing an end fitting for a hose for conveying pressurized fluid media, comprising a hollow body for positioning and retaining the coupling elements of discrete individual hose elements within the hose, a pair of plates disposed within said body at right angles to the longitudinal axis of each hose element, respective apertures defined in said plates for receiving the said coupling elements, adjusting means for verying the axial distance between said plates, resilent means disposed between said plates, and a groove in the internal surface of the said body. the arrangeent being such that when the said plates are pulled towards each other under load at least a part of the resilient means is forced radially outwardly to engage the said body in the said groove.

In a preferred embodiment of the end fitting according to the invention there is a respective peripheral inclined chamfer in facing surfaces of said plates, the resilient means being constituted by a ring disposed in the loaded state of the plates in a space bounded by the groove formed in the internal surface of the body of the end fitting and the two chamfered surfaces, the ring being expediently made of metal. e.g.

steel, and being split at one position.

In another advantageous embodiment, the resilient element is a block made of a resilient material, expediently rubber, which, in the unloaded state, has a major cross-section perpendicular to the said longitudinal axis of the end fitting that is smaller than, and in the loaded state of the plates larger than, the cross-section at the open face of the internal cavity of the end fitting.

The end fitting embodied in the invention is very simple, robustly constructed, less prone to breakdown and therefore may with advantage be used, e.g. in mining.

The invention is described by way of example only with reference to the accompanying drawings, wherein: Figure I is a longitudinal cross-section of an end fitting according to the invention, wherein the resilient means is a steel ring, Figure 2 is a section taken along the plane A - A of Figure 1, Figure 3 is a section taken along the plane B - B of Figure 1, and Figure 4 is a variant of Figure 1, wherein the resilient means is a rubber block.

The end fitting or coupling according to Figures 1 to 3 has a hollow cylindrical body 1 one end of which is open while its other end is coupled by wav of a hooked wire ring 2 (see Figure 2) to an internal coupling member 3. A protective jacket 5 is connected to the coupling member 3 via a sleeve 4 and contains within it several (here five) individual discrete hose elements 7.

The ends of the hose elements 7 projecting into the interior of the body 1 are provided with conventional cylindrical coupling elements 6 which latter consist of two sections of unequal diameter. An annular collar 6' is provided on the larger diameter section.

Proceeding along the internal surface of the body 1 towards the open end there is provide a shoulder 1' and an annular groove D. A plate 8 bears against the shoulder 1' and is provided with recesses or notches E for the coupling elements 6 of the hose elements 7 (Figure 3). On the side of the plate 8 facing the open end of the body 1 peripheral inclined or chamfered surfaces A are provided.

In parallel with the plate or disc 8 another plate or disc 9 is disposed in the body and is provided with bores F for the coupling elements 6. The oppositely facing surfaces of bores F and notches E are grooved to receive and engage the collars 6' of the coupling elements 6. The plate 9 has a peripheral inclined surface or chamfer C on its side facing the closed end of the body 1.

In the space bounded bv the annular groove D and the chamfers A and C there is a resilient element in the form of a ring 10 split at one place and made expediently of steel.

The plate 8 has a central, axial threaded bore while the plate 9 has a similar bore which is of somewhat greater diameter than that of the bore in the plate 8. A screw 11 is passed through the bores and engages the threads of the bore in the plate 8. Thus the axial distance between the plate 8 and the plate 9 varies according to the adjustment of the screw.

The ring 10 is so formed that in the unstressed or "no-load" state its diameter is smaller than the internal diameter of the body 1, while after the plate 8 and the plate 9 have been pulled (screwed) together, the ring 10 opens and enters into the groove D, thus reliably securing the two plates. Thus after tightening the screw 11 the plates will be tightly engaged with each other, with the coupling elements 6 as well as with the body 1, while at the same time the coupling elements 6 take up their desired (design) positions and direction.

Figure 2 shows in greater detail one possible mode of connecting the body 1 and the coupling member or flange 3. However, as this construction is known per se, it will not be described further.

Figure 4 shows an alternative embodiment wherein there are no chamfers at the peripheral surfaces of the plate 8 and the plate 9, and the resilient element between these plates is a block 10' of resilient material. e.g. rubber, provided with bores for the coupling elements 6. In the unstressed ("no-load") state the greatest crosssection of the block 10' at right angles to the longitudinal axis of the body 1 is smaller than the cross-section of the internal cavity of the body I at its open face of side; while after the plate 8 and the plate 9 have been pulled together by means of the screw 11, the edges of the block 10' penetrate into the ananular groove D formed in the internal surface of the body 1 (the groove here being naturally wider than in the Figures 1 - 3 embodiment). and provide a reliable connection.

The collars 6' formed on the coupling elements 6 contribute to the fastening because the bores of the block 10' are clamped thereon as the diameter of these bores diminishes on tightening the screw 11.

The invention is not restricted to the illustrated preferred embodiments. The end fitting may for instance be of rectangular rather than circular cross-section. in which case. of course all the other elements have to be shaped appropriately.

WHAT WE CLAIM IS: 1. An end fitting for a hose for conveying pressurized fluid media. comprising a hollow body for positioning and retaining the coupling elements of discrete individual hose elements within the hose, a pair of

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. steel, and being split at one position. In another advantageous embodiment, the resilient element is a block made of a resilient material, expediently rubber, which, in the unloaded state, has a major cross-section perpendicular to the said longitudinal axis of the end fitting that is smaller than, and in the loaded state of the plates larger than, the cross-section at the open face of the internal cavity of the end fitting. The end fitting embodied in the invention is very simple, robustly constructed, less prone to breakdown and therefore may with advantage be used, e.g. in mining. The invention is described by way of example only with reference to the accompanying drawings, wherein: Figure I is a longitudinal cross-section of an end fitting according to the invention, wherein the resilient means is a steel ring, Figure 2 is a section taken along the plane A - A of Figure 1, Figure 3 is a section taken along the plane B - B of Figure 1, and Figure 4 is a variant of Figure 1, wherein the resilient means is a rubber block. The end fitting or coupling according to Figures 1 to 3 has a hollow cylindrical body 1 one end of which is open while its other end is coupled by wav of a hooked wire ring 2 (see Figure 2) to an internal coupling member 3. A protective jacket 5 is connected to the coupling member 3 via a sleeve 4 and contains within it several (here five) individual discrete hose elements 7. The ends of the hose elements 7 projecting into the interior of the body 1 are provided with conventional cylindrical coupling elements 6 which latter consist of two sections of unequal diameter. An annular collar 6' is provided on the larger diameter section. Proceeding along the internal surface of the body 1 towards the open end there is provide a shoulder 1' and an annular groove D. A plate 8 bears against the shoulder 1' and is provided with recesses or notches E for the coupling elements 6 of the hose elements 7 (Figure 3). On the side of the plate 8 facing the open end of the body 1 peripheral inclined or chamfered surfaces A are provided. In parallel with the plate or disc 8 another plate or disc 9 is disposed in the body and is provided with bores F for the coupling elements 6. The oppositely facing surfaces of bores F and notches E are grooved to receive and engage the collars 6' of the coupling elements 6. The plate 9 has a peripheral inclined surface or chamfer C on its side facing the closed end of the body 1. In the space bounded bv the annular groove D and the chamfers A and C there is a resilient element in the form of a ring 10 split at one place and made expediently of steel. The plate 8 has a central, axial threaded bore while the plate 9 has a similar bore which is of somewhat greater diameter than that of the bore in the plate 8. A screw 11 is passed through the bores and engages the threads of the bore in the plate 8. Thus the axial distance between the plate 8 and the plate 9 varies according to the adjustment of the screw. The ring 10 is so formed that in the unstressed or "no-load" state its diameter is smaller than the internal diameter of the body 1, while after the plate 8 and the plate 9 have been pulled (screwed) together, the ring 10 opens and enters into the groove D, thus reliably securing the two plates. Thus after tightening the screw 11 the plates will be tightly engaged with each other, with the coupling elements 6 as well as with the body 1, while at the same time the coupling elements 6 take up their desired (design) positions and direction. Figure 2 shows in greater detail one possible mode of connecting the body 1 and the coupling member or flange 3. However, as this construction is known per se, it will not be described further. Figure 4 shows an alternative embodiment wherein there are no chamfers at the peripheral surfaces of the plate 8 and the plate 9, and the resilient element between these plates is a block 10' of resilient material. e.g. rubber, provided with bores for the coupling elements 6. In the unstressed ("no-load") state the greatest crosssection of the block 10' at right angles to the longitudinal axis of the body 1 is smaller than the cross-section of the internal cavity of the body I at its open face of side; while after the plate 8 and the plate 9 have been pulled together by means of the screw 11, the edges of the block 10' penetrate into the ananular groove D formed in the internal surface of the body 1 (the groove here being naturally wider than in the Figures 1 - 3 embodiment). and provide a reliable connection. The collars 6' formed on the coupling elements 6 contribute to the fastening because the bores of the block 10' are clamped thereon as the diameter of these bores diminishes on tightening the screw 11. The invention is not restricted to the illustrated preferred embodiments. The end fitting may for instance be of rectangular rather than circular cross-section. in which case. of course all the other elements have to be shaped appropriately. WHAT WE CLAIM IS:

1. An end fitting for a hose for conveying pressurized fluid media. comprising a hollow body for positioning and retaining the coupling elements of discrete individual hose elements within the hose, a pair of

plates disposed within said body at right angles to the longitudinal axis of each hose element, respective apertures defined in said plates for receiving the said coupling elements, adjusting means for varying the axial distance between said plates, resilient means disposed between said plates, and a groove in the internal surface of the said body, the arrangement being such that when the said plates are pulled towards each other under load at least a part of the resilient means is forced radially outwardly to engage the said body in the said groove.

2. An end fitting according to claim 1 wherein said adjusting means is a screw engaging the said plates.

3. An end fitting according to claim 1 or claim 2 wherein facing surfaces of said plates are provided with respective peripheral chamfers, and the resilient means is a ring disposed when said plates are pulled towards each other in the space defined and bounded by the said groove and the said chamfers.

4. An end fitting according to claim 3 wherein said ring is a split metallic ring.

5. An end fitting according to any of claims 1 to 3 wherein said resilient means is a resilient block the major cross-section of which is perpendicular to each said longitudinal axis.

6. An end fitting substantially as herein described with reference to and as shown in Figures 1 - 3 or Figure 4 of the accompanying drawings.

7. A hose provided with an end fitting as claimed in any preceding claim.