Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – With protection or indication of pipe or trench
Reexamination Certificate
1999-02-02
2001-05-08
Bagnell, David (Department: 3673)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
With protection or indication of pipe or trench
C405S150100, C138S098000
Reexamination Certificate
active
06227764
ABSTRACT:
CROSS-REFERENCES TO RELATED APPLICATIONS
This application claims the priority of German Patent Application, Serial No. 298 02 675.9, filed Feb. 17, 1998, the subject matter of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates, in general, to a pipe rehabilitation apparatus, and in particular to an apparatus for introducing a lining hose from a main pipeline, such as a sewer mains, into a lateral connection, such as a service pipe for a property.
SUMMARY OF THE INVENTION
It is a general object of the present invention to provide an improved pipe rehabilitation apparatus for introducing a lining hose from a main pipeline into a lateral connection.
In particular, it is an object of the present invention to provide a pipe rehabilitation apparatus by which a lining hose can be introduced together with a calibration hose in a simple manner from an outlet opening of the apparatus into the lateral connection.
These objects, and others which will become apparent hereinafter, are attained in accordance with the present invention by providing a shield having an arcuate configuration and complementing an inner contour of the main pipeline in an area of an inlet port of the lateral connection, with the shield having an outlet opening destined for alignment with the inlet port of the lateral connection and defined by a cross section which corresponds to a cross section of the inlet port of the lateral connection, a pipe having one end extending from the outlet opening of the shield inwardly into the main pipeline, and a conduit connected to the other end of the pipe for conducting a pressure fluid for everting the lining hose and the associated calibration hose in the lateral connection, with the calibration hose being secured adjacent the outlet opening of the shield.
According to another feature of the present invention, the pipe has an angular configuration and is comprised of a first pipe section extending vertically from the outlet opening, a second pipe section extending substantially horizontal to the first pipe section, and a transition piece for connecting the first and second pipe sections, whereby the conduit is attached to the second pipe section.
The shield is moved in the main pipeline by means of a transport and positioning unit which includes a cantilever arm, whereby the shield is articulated to the cantilever arm so as to be adjustable by the cantilever arm in multiple dimensions and lockable in the adjusted position.
As the inlet port of the lateral connection may be located at different areas of the main pipeline, the shield is swingably mounted to the transport and positioning unit for rotation about a great angular range of e.g. 180°. Also, after alignment of the outlet opening of the shield for passage of the lining hose and the calibration hose, the shield must be pressed against the inner contour of the main pipeline. In accordance with the present invention, the conformation of the shield surface with respect to the structured inner surface of the main pipeline is realized by an elastic padding which is arranged on the outer surface of the shield. However, it is also conceivable, to render the shield of elastically deformable material so as to realize the required conformation of the shield with respect to the inner contour of the sewer mains.
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Einhaus Gerhard
Schreiner Herbert
Bagnell David
Howrey Simon Arnold & White , LLP
KMG Kanal-Muller-Gruppe International GmbH & Co. KG
Mayo Tara L.
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