Press-fitting for non removable tube coupling

US6260891A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Herbert Foering · Solingen, DE
• Rainer Franzen · Krefeld, DE
• Thomas Gigowski · Grevenbroich, DE

Key dates

• Filing date: Nov 29, 1999
• Grant date: Jul 17, 2001
• Expiry date: Nov 29, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S285/918
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A press fitting for producing a nondetachable tight connection of smooth-ended pipes which has at least one portion receiving a toroidal sealing element and an adjoining cylindrical area extending in the longitudinal direction, and is provided with a shoulder acting as a stop for the pipe which can be pushed in or pushed on. The sealing element has, in the circumferential direction, at least one portion which is provided with a cross section diverging from the starting cross section in that a bulge extends along the circumference and along the cross-sectional plane and a recess facing the pushed in pipe extends radially in the cross section of the sealing element, the volume of the bulge compared with the starting cross section is at least equal to the volume of the recess lacking at the starting cross section and, before pressing, the recess of the sealing element forms a through-opening in the axial direction viewed in cross section.