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:
Aug. 10, 2010
Filed:
Sep. 26, 2008
Applicants:
Christof Kruse, Wenden, DE;
Stefan Wrede, Kirchhundem, DE;
Hans-juergen Wahl, Zella-Mehlis, DE;
Inventors:
Assignee:
Longyear TM, Inc., South Jordan, UT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/00 (2006.01); E21B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A modular base assembly for a rotary drill head includes a drive flange assembly having a tubular drive shaft configured to engage at least a lower drive interface. The modular base assembly also includes a gear housing supporting the drive flange assembly. Furthermore, the modular base assembly can also include a plurality of interchangeable gear pinions selectively coupled to the drive flange assembly.