Pipe joints or couplings – With fluid pressure seal – With expansible chamber means
Patent
1995-02-15
1996-07-09
Arola, Dave W.
Pipe joints or couplings
With fluid pressure seal
With expansible chamber means
285375, 285320, F16L 1702
Patent
active
055337627
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an assembly device of a first element on a tubular part equipped with a fluid channel, and comprising a second element slidingly mounted with respect to said first element.
STATE OF THE ART
When the fluid channels of parts, notably ducts, are to be connected, this gives rise on the one hand to tightness problems if the fluid pressure is relatively high and on the other hand to mechanical connection problems if one of the parts has to be interchanged with other parts. This is the case in particular in apparatuses for testing the pressure resistance of components such as radiators or heat exchangers of heat generating units which can present connecting end-pieces of different sizes. The same problems arise when the end of a channel of a part is to be blanked off, notably of a duct under pressure.
The document U.S. Pat. No. 3,001,804 refers to a tight connection device between two tubular components, which comprise two end-pieces axially engaged in one another to form a telescopic assembly. Tightness is achieved by means of two O-ring seals housed in coaxial annular grooves and having the same diameters. Such a device constitutes a sliding static tightness, allowing linear expansions when the duct is subjected to temperature changes or mechanical stresses.
SUMMARY OF THE INVENTION
The object of the invention consists in improving the tightness of two connected pads, subjected to fluids under pressure.
The assembly device according to the invention is characterized in that: predetermined axial position, in which the second element presses axially around an opening of the fluid channel of said part, allowing communication of the channel with said first axial passage, respectively of the first and second elements, said space being in communication with the first axial passage of the second element, in such a way that the fluid pressure in the space urges the second element against the part, the crushing force of the first seal depending on the fluid pressure.
According to a first embodiment of the invention, the second element may comprise a removable head which forms the tight bearing on said part. Thus, the device of the invention can present heads of any shape to fit second parts of conjugate shapes.
According to a feature of the invention, a spring can advantageously be fitted between said first and second elements, the action of the spring urging the head into abutment against the part to increase the tightness. The spring preferably extends inside the space, between the opposite surfaces of said elements.
According to another feature, the connection device can advantageously comprise stop means limiting the axial movement of said first and second elements with respect to one another.
According to a preferred embodiment, the coupling means comprise at least one arm mounted pivoting on said first element and designed to come into engagement with a retaining component of said part.
According to another alternative embodiment, the first element is formed by a blanking plug.
According to another alternative embodiment, the tightness of the internal space filled with fluid under pressure is ensured by means of a bellows, which can be made of either metal, or plastic, or rubber material.
DESCRIPTION OF THE DRAWINGS
Other advantages and features will become more clearly apparent from the following description of different types of devices according to the invention given as non-restrictive examples only and represented in the accompanying drawings, in which:
FIG. 1 represents a longitudinal section of an assembly device according to the invention to connect two ducts;
FIG. 2 represents an external top view of the device of FIG. 1;
FIG. 3 shows a partial longitudinal section of the assembly device of FIG. 1, adapted to blank off a duct;
FIG. 4 is an identical view to FIG. 1, representing an alternative embodiment.
DETAILED DESCRIPTION OF THE INVENTION
The assembly device represented in FIGS. 1 and 2 constitutes a connection device, designated
REFERENCES:
patent: 1474270 (1923-11-01), Lewis
patent: 1719223 (1929-07-01), Grohek
patent: 1744467 (1930-01-01), Greene
patent: 1952451 (1934-03-01), Mitchell
patent: 2391885 (1946-01-01), Deshields
patent: 2476777 (1949-07-01), Smith
patent: 3001804 (1961-09-01), Tomlinson et al.
patent: 3291442 (1966-12-01), Cranage
patent: 3319979 (1967-05-01), Herold et al.
patent: 3339832 (1967-09-01), Duecker
patent: 3494641 (1970-02-01), Caregnato
patent: 3843171 (1974-10-01), Hewlett
patent: 3899199 (1975-08-01), Garey
patent: 5163722 (1992-11-01), Worden
patent: 5209528 (1993-05-01), Weh
patent: 5303959 (1994-04-01), Medsker
patent: 5390963 (1995-02-01), Namekawa
Arola Dave W.
Assistance Proto Industrie France
LandOfFree
Assembly device of an element on a part presenting a fluid chann does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Assembly device of an element on a part presenting a fluid chann, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Assembly device of an element on a part presenting a fluid chann will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1862646