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Patent
Title

Dichtungen fuer Rohrverbindungen

Other Title
Seal for pipe joints formed by one pipe inserted into another comprises a pocket which is filled with a swellable water absorbent material, and initially is closed by means of at least one movable element.
Abstract
Die Erfindung betrifft eine Dichtung fuer Rohrverbindungen zur Abdichtung zwischen den benachbarten Wandungen zweier ineinandergeschobener Rohre. Sie weist mindestens eine mit einem mit Wasser quellbaren Material (8) fuellbare Tasche (9) auf. Die Tasche (9) im nichtgequollenen Zustand des quellbaren Materials (8) ist durch mindestens ein bewegliches Element (16) verschliessbar und das bewegliche Element (16) weist mindestens eine Oeffnung (17) zum Durchschnitt von Wasser in die Tasche (9) auf.

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WO 200121998 A UPAB: 20010620 NOVELTY - The seal for pipe joints formed by one pipe (1) inserted into another (2) comprises a pocket (9) which is filled with a swellable water absorbent material (8). Initially the pocket is closed by at least one movable element (10, 11). The pocket and/or the movable element are/is provided with at least one opening for entry of water into the pocket. USE - In particular, for sealing joints between large-diameter pipes made of concrete. ADVANTAGE - The seal is capable of quickly and durably compensating large gap variations brought about by various circumstances such as, for example, ground displacements.
Inventor(s)
Wack, Holger  
Gross, H.
Wodke, Thomas  
Dolfen, E.
Link to:
Espacenet
Patent Number
1999-19945157
Publication Date
2001
Language
German
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
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