Patent · US Expired

Apparatus for testing pipes by a pipe tester

US4537407A · kind A · utility

4Cited by

6References

12Claims

0Family size

Assignee

Mannesmann Demag Wean · US

Inventors

Herbert Jansen · Nuremberg, DE
Hans-Gunter Schiffers · Wittlich, DE
Richard Gerretz · Viersen, DE

Key dates

Filing date	Feb 28, 1984
Grant date	Aug 27, 1985
Priority date	—
Expiry date	Feb 28, 2004

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S277/929
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sealing arrangement around an end of a pipe received in a testhead of a hydraulic pipe testing apparatus, which sealing arrangement consists of an elastic sealing ring and an adjacent, rigid support ring of varying diameters. Both rings are mounted in radial recesses in the testhead and encircle the pipe upon its entry into the testhead. The recess for the elastic sealing ring consists of a flat ring located between the sealing ring and the rigid support ring. For a sealing condition, the support ring is contracted to abut the pipe and the sealing ring is caused to be deformed whereby it flows radially outwardly from its recess against the pipe and axially along the pipe towards and away from the pipe's end. In the axial direction away from the end of the pipe, the sealing ring flows around the flat ring to abut the rigid support ring.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.