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:
Jun. 21, 2011
Filed:
Oct. 20, 2006
Applicants:
Dieter Wurm, Kirchundem, DE;
Hans-joachim Bayer, Kohlberg, DE;
Udo Harer, Straubenhardt, DE;
Inventors:
Assignee:
Tracto-Technik GmbH, Lennestadt, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for overdrilling a buried line includes a rotatably driven thrust linkage and/or traction linkage, and has a forward end which is connected to a ring-shaped to hollow cylindrical overdrilling head which embraces the line. The overdrilling head is provided interiorly with a centering protrusion for spontaneous centering of the overdrilling head in concert with the line.