Device for connecting two tubular pipe sections

Details Device for connecting two tubular pipe sections Device for connecting two tubular pipe sections

1998-11-25

2001-06-26

Luu, Teri Pham (Department: 3627)

Pipe joints or couplings

Packed

Flanged pipe

C285S406000, C285S420000

Reexamination Certificate

active

06250693

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to a device for connecting two tubular pipe sections and more particularly to a device for connecting two tubular pipe sections in an exhaust system of a motor vehicle.
RELATED TECHNOLOGY
German Patent Application No. 44 44 550 A1 discloses a device for connecting two tubular pipe sections, the connecting pieces being held together by spring means using a pre-tensioning force. The spring means feature one plate spring braced against one connecting piece, and one further plate spring in operative connection with a respective other connecting piece. The two plate springs are pre-tensioned against each other by clamps. However, this design is relatively costly in construction, and moreover, requires a relatively great amount of additional installation space.
French Patent Document No. 2 360 028 describes a device for connecting two tubular pipe sections in the exhaust system of a motor vehicle, a coiled spring being tensioned between the two connecting pieces which presses the two pipe sections apart in the axial direction. The intention with this arrangement is to decouple engine vibrations which, however, is only inadequately performed in this case.
Further types of connections known from the art, such as bolted flanged couplings or plug-in connections, in which exhaust pipes are inserted into one another and then joined by a clamping ring, require special decoupling elements for decoupling vibrations. These additionally must be welded into the system, or secured to it in another manner.
The known pipe connections also have the disadvantage that they require too much effort in their construction, cause great expense, and take up a large installation space.
SUMMARY OF THE INVENTION
An object underlying the present invention is to provide a device for connecting two tubular pipe sections which is simple in its design, is cost-effective, and takes up little installation space.
The present invention provides a device for connecting two tubular pipe sections, in particular pipe sections in an exhaust system of a motor vehicle. A sealing device is arranged between the pipe sections, the pipe sections each having a flange-type end piece at their ends, and the pipe sections being held together by a spring device using a pre-tensioning force. The spring device has a mid-section extending at right angles to the longitudinal axis of the pipe sections and has a spring element (
4
). From the transverse sides of the mid-section (
5
), which extend at right angles to the longitudinal axes (
9
) of the pipe sections (
1
,
2
), spring limbs (
6
,
7
) extend at least partially over the periphery of the pipe sections (
1
,
2
), forming an at least approximate U-shape. The spring limbs (
6
,
7
) each having a centrical cut-out (
8
) that is adapted to the outside diameter of the pipe sections (
1
,
2
) and in which a pipe section (
1
,
2
) is accommodated in each case in the mounted state of the spring element (
4
).
The embodiment of the device according to the present invention offers the possibility of guiding the spring element over the two end pieces in such a way that the two pipe sections are held together by the pre-tensioning force. In so doing, it is advantageous that the interconnection region of the two pipe sections can be kept very small, which means only a small installation space is needed. Furthermore, the spring element can be mounted in a simple manner without additional tools.
The device of the present invention is used not only for connecting pipes, e.g. exhaust pipes of a motor vehicle, but also for connecting an exhaust pipe to a pipe connection of a turbocharger as a pipe section.


REFERENCES:
patent: 2691201 (1954-10-01), Matthews
patent: 3479069 (1969-11-01), Sedam
patent: 3791681 (1974-02-01), Moldow
patent: 5348353 (1994-09-01), Deweerdt
patent: 5820168 (1998-10-01), Giacomoni
patent: 105198 (1927-01-01), None
patent: 2913561 (1979-10-01), None
patent: 44 44 550 (1996-06-01), None
patent: 197 28 973 (1999-01-01), None
patent: 0 434 529 (1991-06-01), None
patent: 1244960 (1960-09-01), None
patent: 1 277 596 (1962-03-01), None
patent: 2 360 028 (1978-12-01), None
patent: 24094 (1896-09-01), None
patent: 176889 (1989-07-01), None

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