Junction device for hoses

Details Junction device for hoses Junction device for hoses

2000-12-08

2001-11-06

Brinson, Patrick (Department: 3752)

Pipes and tubular conduits

Combined

With end structure

C138S125000, C285S256000, C285S259000

Reexamination Certificate

active

06311733

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a junction device for hoses. As is well known, such devices are used in plants for distributing pressurised fluids, in which it is necessary to provide for the end of the pipe to be able to be inserted easily and rapidly into an apparatus positioned downstream of the junction device itself. For this purpose junction devices are known which comprise an insert destined to be inserted into the free end of the hose and a bushing destined to be inserted externally to the hose itself.
By pinching the three elements thus assembled, the locking of the hose is obtained between the bushing and the insert. The insert comprises sealing elements, for instance O-rings, inserted in the coupling area with the apparatus to be used.
Known device can comprise both the bushing and the insert made of metallic material, but they have rather high costs.
Also known are devices in which the insert is made of plastic material, consequently decreasing costs. In addition, this type of devices has some drawbacks.
In the first place the coupling of the bushing and the insert is stabilised only by means of the final clinching phase. In the second place, to guarantee the seal and prevent the pipe from being extracted, the clinching operation is performed with shaped clamps, expressly made, which crush the insert, deforming it, with the risk of limiting its sealing ability.
SUMMARY OF THE INVENTION
The aim of the present invention is to eliminate the aforesaid drawbacks by making available a junction device which allows a correct positioning between bushing and insert and a proper centring during the clinching phase. A further aim of the present invention is to standardise the dimensions of the bushing and prevent possible deformations of the insert during the manufacturing phase.
Yet another aim is to obtain a proper centring between the hose and locking elements with the downstream apparatus, to avoid off-axis conditions and incorrect positioning of the sealing elements.
Said aims are fully achieved by the junction device for hoses of the present invention, which is characterised by the contents of the claims set out below and specifically in that it comprises an insert provided with an annular groove and a bushing provided with a concave annular area which, when the junction device is assembled, is positioned internally to said annular groove of the insert.


REFERENCES:
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