The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2014
Filed:
Apr. 02, 2009
Applicants:
Elmar Koch, Eslohe, DE;
Martin Köper, Attendorn, DE;
Michael Heimes, Lennestadt, DE;
Sebastian Schwarzer, Meschede, DE;
Inventors:
Elmar Koch, Eslohe, DE;
Martin Köper, Attendorn, DE;
Michael Heimes, Lennestadt, DE;
Sebastian Schwarzer, Meschede, DE;
Assignee:
Tracto-Technik GmbH & Co. KG, Lennestadt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L 55/18 (2006.01); F16L 55/165 (2006.01); E21B 29/00 (2006.01); E21B 7/20 (2006.01); B23D 21/02 (2006.01);
U.S. Cl.
CPC ...
F16L 55/1658 (2013.01); E21B 29/00 (2013.01); E21B 7/205 (2013.01); B23D 21/02 (2013.01);
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.