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:
Mar. 03, 2015
Filed:
Apr. 03, 2008
Applicant:
Franz-josef Püttmann, Lennestadt, DE;
Inventor:
Franz-Josef Püttmann, Lennestadt, DE;
Assignee:
Tracto-Technik GmbH & Co. KG, Lennestadt, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F 5/10 (2006.01); F16L 55/165 (2006.01); E21B 7/04 (2006.01); E21B 7/30 (2006.01); E21B 17/046 (2006.01);
U.S. Cl.
CPC ...
F16L 55/1658 (2013.01); E21B 7/046 (2013.01); E21B 7/30 (2013.01); E21B 17/046 (2013.01);
Abstract
The invention relates to a system for the overground operation of underground sewer tools, especially of expander and pulling heads comprising a rod assembly that is rigid when pushed and a supporting device absorbing shear or tractive forces.