Pipe coupling

US6131956A · 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: Oct 17, 2000
• Expiry date: Apr 26, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L13/141
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pipe coupling comprises a cylindrical pipe, whose smooth end section can be slipped onto 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 and the fitting. The fitting and the pipe are securely connected to each other by means of an externally applied pressing tool, which acts in a plastically deforming manner on at least one radial plane on the pipe as well as the fitting section located below it. Between the fitting outer wall and the pipe inner wall is arranged a metal sleeve (31), which can be slipped onto the fitting by force. The fixed axial extension of the metal sleeve (31) encompasses the length of the fitting (1) The length of the metal sleeve is selected so as to correspond to the required overlap between the pipe (2.1, 2.2) and the fitting This required overlap is attained when, after placement of the pipe end region onto the metal sleeve (31), or after insertion of the fitting together with the previously slipped-on metal sleeve (31) into the pipe end region, the end face (9, 10) of the pipe end region facing the fitting (1) coincides exactly with a marking on the metal slee…