Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1995-11-30
1998-03-31
Melius, Terry Lee
Pipe joints or couplings
With casing, lining or protector
Insulated
285285, 285910, 285328, 285370, F16L 5500
Patent
active
057329826
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a coupling joint, arranged to join a first element having a substantially circular internal envelope surface to a second element, inserted into the first element, having a substantially circular envelope surface with a smaller diameter than the internal diameter of the first element.
BACKGROUND OF THE INVENTION
It is previously known, for example with regard to ventilation installations, to join tubular elements having different diameters by use of an intermediate member, with a first end portion having a diameter adapted to one of the tubular parts to be joined, and having the opposed end portion arranged with a diameter adapted to the second tubular element. Such intermediate members are manufactured for only one specific type of use, and cannot be modified for use with other tubular dimensions. For many other applications, adaption is also required between an element with a cylindrical external envelope surface and a second element with a cylindrical internal envelope surface, and with a large diameter difference between internal and external diameters. For certain cases, a tubular sleeve can be used to accomplish a required diameter adaption between the elements. However, such sleeves are also manufactured for a predetermined diameter adaption, and cannot be modified for adaption within a different range of diameters. The elements between which diameter adaption is required may be tubular, solid or semi-solid.
SUMMARY OF THE INVENTION
The object of the present invention is to disclose a coupling joint, which easily can be adjusted to an actual diameter difference within a certain predetermined range, and which facilitates providing a joint which is resistant against vibrational and bending forces, and which also can be arranged having very good sealing properties. The joint is in particular suitable as a coupling joint between two tubular elements or hoses, but can also be used for applications when one of the elements has a substantially solid cross-section.
The joint can be mounted quickly and simply, without use of special purpose tools.
The coupling joint according to the present invention is arranged to join a first element having a substantially circular internal envelope surface with a second element, inserted into the first element, having a smaller external diameter than the internal diameter of the first element, and it is mainly characterized in that a helically wound and in a longitudinal direction, corrugated or creased strip-shaped intermediate member is arranged in an intermediate position between the first and the second element, and that at least one of the elements by means of an expanding or clamping joint is pressed against the intermediate member causing same to be compressed or pressed against adjacent envelope surfaces of the elements.
BRIEF DESCRIPTION OF THE DRAWINGS
Examples of embodiments of a coupling joint according to the present invention will now be more fully described with reference to the accompanying drawings, in which:
FIG. 1 shows a perspective view, partly in cross-section, disclosing two tubular elements joined by means of a coupling joint according to the present invention;
FIG. 2 shows a cross-sectional view of the member located intermediately between the elements in the example of an embodiment shown in FIG. 1;
FIG. 3 is a longitudinal sectional view of a wall portion of the two elements shown in FIG. 1; and
FIG. 4 is a perspective view of part of the intermediately located member shown in FIG. 3.
FIG. 5 is a side view of a helically wound intermediate member having corrugations or creases extending in an inclined relationship to its longitudinal axis.
FIG. 6 is a longitudinal sectional view of the intermediate member helically wound between the two elements similar to FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows an example of an embodiment of a coupling joint according to the invention, arranged to join a first and external tubular element 1 with a second tubular e
REFERENCES:
patent: 58469 (1866-10-01), Parker
patent: 180911 (1876-08-01), O'Neill
patent: 2052603 (1936-09-01), Christenson
patent: 2085907 (1937-07-01), Gray
patent: 2259609 (1941-10-01), Boyd
patent: 3038553 (1962-06-01), Peters
patent: 3376060 (1968-04-01), Tomioka
patent: 3926445 (1975-12-01), Farnam
patent: 4516782 (1985-05-01), Usher
Melius Terry Lee
Shackelford Heather
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