Patent · US Active

Tool for longitudinally subdividing sewer pipes

US8882393B2 · kind B2 · utility

2Cited by

8References

13Claims

0Family size

Assignee

TRACTO-TECHNIK GmbH & Co., KG · DE

Inventors

Elmar Koch · Eslohe, DE
Martin Köper · Attendorn, DE
Michael Heimes · Lennestadt, DE
Sebastian Schwarzer · Meschede, DE

Key dates

Filing date	Apr 2, 2009
Grant date	Nov 11, 2014
Priority date	—
Expiry date	Jan 21, 2030

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B29/00
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

The invention relates to a tool for longitudinally subdividing buried sewer pipes having an asymmetric, generally oval cross section, made substantially of a support shoe opposing a cutting blade acting in the direction of the pipe axis. The device also has two side cutting blades and is moved through the old pipe by means of a rod and a cylindrical calibration mandrel.

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