AU4527397A - A universal and adaptable hose fixture method - Google Patents

Description

AUSTRALIA

PATENTILS ACT 1990 CCJIPLETrE SPEciFTcAToN STANDARD PATENT A UNIVERSAL AND ADAPTABLE HCSE FXTURE MEAMI This invention relates to methods of fixing end fittings on hoses, such methods normally use heavy swaging machines and they require expensive mactuned steel fittings that are fixed on the hose by using the rotary head in the machine to reduce the steel fitting onto the hose by mu~ltiple rotary bammer like blows on the outside of the fitting, machines of this type are found in specalist hose service shops. Another mrethod of fitting end fittings to hoses is to use screwed re-usable service ends, howver depending on the hose type this type of fitting can be unsuitable. In the first instance the swaged fitting is discarded if the end fitting has to be changed.

The object of this invention is to offer another mrethod of providing a simple and cheap method of fitting end fittings to hoses by using a simple end 4 fitting and rnetalic rings, the fitting can be used many times if new rretalic 4 rings are used, by the use of this mrethod hoses can be made or joined on a permanent basis, it comprises, iretalic end fitting with one end supplied as a normal hose end and on the other specially manufactured groove or grooves and one or mre netalic rings, the rings are placed on the outside of the hose with the end of the fitting with the grooves inserted into the hose, the rings are situated above the groove or grooves and then the rings are reduced in 20 diameter by the use of a split captive die application, when the ring is reduced the hose is canpress4Ed into the special groove, the number of rings anid grooves relate to the internal pressure of the hose, the metalic ring compressed into the groove retains the hose onto the fitting, when the rings are reduced in diameter to that of the split captive die the wail thickness of the ring increases thus assisting the compress ion of the hose into the groove on the fitting, when the rings are reduced in external diameter and the wall thickness increases the tensile strength of the iretalic ring increases.

The probleii caused by the use of expensive swaging machines and fittings in specalist workshops is overcome by use of a further feature of the invention in that the die used can be found in monst workshops and garae which have a manual or powered press, thus enabling a quick fix of a broken hose or Production of a lower cost hose assembly or joined hose.

To assist with understanding the invention, reference will1 rxw be made to the accomipanying drawings which show, end fittings, rings, joiners and the die application.

In the drawings: Fig 1 shows the special netalic fitting with multiple grooves, special metalic rings and an examp~le of hose with steel reinforcement used in high pressure applications, the rings used are sized to suit each external diameter of hose, the hose, rings, and fittings are shown in section.

Fig 2 shows the special fitting tail inserted into the hose with the metalic ring on the outside of the hose in location before reduction.

Fig 3 shows the hose, special fitting and special metalic rings, the rings have been reduced in diameter by way of a suitable split captive die, thus the ring has compressed the hose into the special groove on the end fitting, during the reduction of the ring diamieter the wall thickness of the ring has increased due to the captive nature of the die, the hose now comipressed into the groove creates a lock between the end fitting and the hose, ntre than one ring is used on high pressure applications, also shown is a typical die location to hold and captivate the ring during reduction of the outside diameter of the ring.

Fig 4 shows the special end fittings with various groove profiles that can be used, also illus itrated is the increase in wall thickness when the outside diameter is reduced this assists the retaining pressure on the hose.

Fig -5 shows the special fitting used to join one or moxre pieces of hose by using the joiner, metalic rings and by using the split captive die.

Referring back to Fig 1 it can be seen that the hose end fitting 1 has a specially designed tail 2 with grooves 3 the fitting 1 Will fit .intao hose 4 and the iretalic rings 5 fit on the outside of the hose 4 before assembly, the item are shown in section: Referring back to Fig 2 it can be seen that the special fitting 1 with tail 2 and grooves 3 is inserted in the hose 4 and the special netalic rings 5 are placed over the hose 4 in location above the grooves 3 in this sectional drawing it can be seen that the rings 5 are loose on the hose 4.

Referring back to Fig 3 it can be seen that the rings 5 have been reduced in diameter by the use of a split captive die 6 thus compressing the hose 4 into the grooves 3 on the tailI 2 of the fitting 1, in this assembled outline the netalic rings 5 have been reduced in external diameter, this act-ion increases the wall thickness of the ring section and assists the comnpress ion of the hose 4, this comipress ion on the hose 4 into the grooves 3 creates the lock between the tail 1 and the hose 4, by using more than one ring hoses for high pressure applications can be produced Referring back to Fig 4 it can be seen that there is a range of cross sectional shapes A B and C that can be used on the special fitting 1 by changing the ring 5 and groove profife to A3 B3 and C3 it can be seen that all the illustrated shapes when reduced in a split captive die will reduce in external diameter 6 and lock the hose 4 into the special grooves, the netal in the ring 5 when compressed on the outside diameter will flow and increase the cross sectional area of the ring 5 other shaped rings when compressed in a die will react in a similar amnner to those illustrated.

Referring back to Fig 5 it can be seen that a double ended fitting with tails 2 and multiple grooves 3 can be used to join hoses 4 by using one or more rings on each side of the join.

Claims (11)

1. A method of producing complete hose assemblies using special metalic fittings with the described tails with standard industrial hose ends and special etalic rings.

2. The special metalic tail with grooves and uetalic rings can be used on all types of rubber, steel reinforced rubber hose and or plastic hoses by using the standard metalic rings described, reduced in diameter by a circular split captive die.

3. The rings when c.pressed in a circular die wil- reduce in diameter and increase in wall thickness to create the locking means of coMpressing the hose into the grooves on the metalic tqil, thus enabling a complete hose to be manufactured.

4. Te rings are easily replaced by cutting through the ring enabling the end fitting to be reused or the type of end fitting to be changed.

5. The special joiner with netalic rings allow 2 or more pieces of hose to be joined without replacing the complete hose or using swaged type fittings.

6. This method of assembling hoses can be used in most situations where a manual or pow-red press is available.

7. The method is suitable for low or high pressure hoses.

8. The method is suitable for hoses with steel reinforcement.

9. The described method is a lower cost hose manufacturing system.

A particular method is illustrated for compressing rings by way of a circular die onto hoses fitted with a standard threaded end fitting manufactured with special tails and modifications to these may take place without departing from the scope of the applied claim.

11. The method herein described with reference to the accompanying drawings. Name of Applicant Date