Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate
Patent
1998-04-27
2000-01-18
Nicholson, Eric K.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
2851392, 285351, F16L 4108
Patent
active
060151692
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a connecting pipe for a liquid-tight connection to a sewer pipe in whose wall a branch opening is placed, which pipe comprises: chambers are arranged which are spaced from one another and into which a sealing element can be placed, and surface of the sewer pipe.
DE-U-29 601 453 teaches a connecting pipe for a feed pipe. The connecting pipe comprises an insertion part provided with circumferential rubber seals. After the placing of a branch opening in the sewer pipe the insertion part is inserted into the branch opening. The ends of the rubber seals which ends press on the inner wall of the sewer pipe consisting of concrete then assume the sealing function.
It is disadvantageous that a sealing and holding behavior of the connecting pipe in the branch opening is a function of the material elasticity of the rubber seals. The extreme roughness of the concrete can reduce the seal. Gases developing in the sewer pipe can expel the insertion part like a cork out of a champagne bottle.
A connection of a connecting pipe to a sewer pipe is known from DE-U-29 514 881. A circumferential sealing chamber is arranged at the end of the connecting pipe into which chamber a ring seal is placed. The ring seal has a sealing lip extending over the sealing chamber. The connecting pipe is then completely thrust through a branch opening placed in the sewer pipe with the seal designed in this manner in front. The tight-closing connection is established by raising up the connecting pipe. A tension ring under which a position ring is placed assures a tightening of the sealing ring. A groove placed in the connecting pipe into which groove a web of the positioning ring engages assures that the positioning ring rests in the proper position on the surface of the sewer pipe.
A connection of a connecting pipe to a sewer pipe is known from DE-A-3 446 360. An opening is placed in the sewer pipe. In order to assure the connection between the sewer pipe and the connecting pipe the connecting pipe comprises an insertion piece whose e nd intended to be inserted into the opening has the form of an outwardly directed collar with an outside diameter essentially equal to the diameter of the opening. The other end, intended to receive the branch line, has an external threading. The connecting pipe is provided with an insertion piece whose outside diameter is less than the outside diameter of the collar and of the end provided with the threading. In addition, the connecting pipe comprises a tension ring. An L-shaped sealing ring is placed into a developing sealing chamber which sealing ring is then tightened with the tension ring. A disadvantage is the fact that the sealing connection can only be produced by a tightening of the individual parts of the outer tube. The sealing ring rests hereby on the outer surface of the sewer pipe and extends into the inside of the opening.
AT-C 332 815 teaches a sealing ring for a connection between conduit shafts and pipes vertical to the latter.
A disadvantage is the fact that the sealing ring rust correspond to the dimensions of the opening of the conduit shaft since it rests on the outer and the inner surface of the sewer pipe while jacketing the opening at the same time. As a result of this special shape the sealing ring must assume the function of the inflow pipe at the same time.
EP-A-0 603 775 teaches a method of tightly connecting a sewer pipe to a connecting pipe and teaches a connecting pipe which can be tightened to this end. The connecting pipe comprises a sealing holding chamber on one end into which chamber a ring seal is placed. A branch opening is placed in the sewer pipe into which opening the connecting pipe is inserted with the sealing chamber in front until a turned-in sealing lip is freed. The connecting pipe is sealingly held in the branch opening by a raising up and subsequent tightening with a tension ring. Elevations of pressure which occur in the interior of the sewer pipe are not able to press the connecting pipe tightened in this manner out of the conduit opening.
REFERENCES:
patent: 3759280 (1973-09-01), Swanson
patent: 3981061 (1976-09-01), Jackson et al.
patent: 4078834 (1978-03-01), Hauff
patent: 4164255 (1979-08-01), Binet et al.
patent: 4174126 (1979-11-01), Hauff
patent: 4448447 (1984-05-01), Funk et al.
Funke Hans-Gunter
Funke Norbert
Kunst-Stoffrohren Sedenhorst GmbH
Nicholson Eric K.
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