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:
Apr. 10, 2018
Filed:
Jul. 29, 2015
Applicant:
Tracto-technik Gmbh & Co. KG, Lennestadt, DE;
Inventor:
Franz-Josef Püttmann, Lennestadt, DE;
Assignee:
TRACTO-TECHNIK GmbH & Co. KG, Lennestadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/00 (2006.01); E21B 4/14 (2006.01); E21B 4/06 (2006.01); E21B 1/04 (2006.01);
U.S. Cl.
CPC ...
E21B 1/00 (2013.01); E21B 1/04 (2013.01); E21B 4/06 (2013.01); E21B 4/14 (2013.01); E21B 4/145 (2013.01);
Abstract
A ram boring device has a pressurized-fluid driven striking piston in a device housing and a rotating reversing device configured to urge the striking piston from a forward operation to a reverse operation, in order to create oblique or horizontal bores in the ground. A piston chamber of a rotary piston drive is connected to a control fluid line.