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. 05, 2002
Filed:
Dec. 21, 1999
Applicant:
Inventor:
Franz-Josef Püttmann, Lennestadt, DE;
Assignee:
Tracto-Technik Paul Schmidt Spezialmaschinen, Lennestadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/04 ;
U.S. Cl.
CPC ...
E21B 7/04 ;
Abstract
In a ram drilling tool having a steering element, for example a steering head, which is mounted in the tool casing such that it can move, for example rotate, the tool casing is connected to a pressure-medium line such that it cannot rotate and to a sleeve pipe such that it can rotate; it may therefore be adjusted with low friction by means of rotation with the aid of the pressure-medium line with respect to the steering element, which is firmly held by the ground.