Patent · US Expired

Method and apparatus for producing underground pipes

US4647256A · kind A · utility

13Cited by

11References

7Claims

0Family size

Assignee

Ed. Zublin Aktiengesellschaft · DE

Inventors

Volker Hahn · Echterdingen, DE
Eberhard Beitinger · Stuttgart, DE

Key dates

Filing date	Feb 28, 1985
Grant date	Mar 3, 1987
Priority date	—
Expiry date	Feb 28, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S138/01
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method of producing underground pipes, with pipe sections being pressed ahead into the ground. For each pipe section, at least two partial pipe shells are used which are separated from one another in the longitudinal direction, and are joined about supply lines which are guided through the pipe. The joining process is effected before the pipe section is pressed into the ground. With this method, the supply lines do not have to be interrupted when a new pipe section is introduced. The apparatus for carrying out the method is provided with at least one joining station for joining the partial pipe shells in a precisely fitting manner, and a combining station for interconnecting the partial pipe shells.

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