Pipe coupling

US6241290A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Herbert Foering · Solingen, DE
• Thomas Gigowski · Grevenbroich, DE
• Michael Berane · Langenfeld, DE
• Karl-Heinz Hartings · Langenfeld, DE
• Johannes Schurr · Bonn, DE

Key dates

• Filing date: Apr 26, 1999
• Grant date: Jun 5, 2001
• Expiry date: Apr 26, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L21/02
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pipe coupling with a cylindrical pipe, whose smooth end section can be inserted into a fitting that has at least one sleeve-like area extending in the longitudinal direction. At least one sealing ring is arranged between the pipe outer wall and the fitting inner wall. The fitting and the pipe are connected securely to each other by an externally applied pressing tool that acts in a plastically deforming manner on at least one radial plane of the sleeve-like area of the fitting as well as the pipe section located under this. A metal sleeve, which can be placed over the pipe ends by force, is arranged between the pipe outer wall and the fitting inner wall. The fixed axial extension of the metal sleeve surrounds the pipe starting from the pipe end face, and the length of the metal sleeve is selected so as to correspond to the required overlap between the pipe and the fitting. This required overlap is attained when, after placement of the fitting onto the metal sleeve, or after insertion of the pipe and the metal sleeve into the fitting, the end face of the fitting facing the pipe coincides exactly with the end of the metal sleeve, and the sealing ring, seen in cross-section, is pene…