Patent · US Active

Method and device for reconstructing old underground pipes

US8075224B2 · kind B2 · utility

5Cited by

12References

13Claims

0Family size

Assignee

TRACTO-TECHNIK GmbH & Co., KG · DE

Inventors

Elmar Koch · Eslohe, DE
Martin Köper · Attendorn, DE

Key dates

Filing date	Aug 18, 2006
Grant date	Dec 13, 2011
Priority date	—
Expiry date	Aug 18, 2026

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B19/086
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method for in-situ repair of old underground pipes is disclosed. A breaking tool with a drive or a pipe section is pulled from a typical inspection shaft to the next inspection shaft (machine shaft) by a hydraulic piston-cylinder unit which has a housing that is at least partially located inside the old pipe. The extremely limited interior space of the machine shaft is thereby kept essentially free from machine parts.

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