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:
Nov. 10, 2020
Filed:
Nov. 04, 2015
Applicant:
Tracto-technik Gmbh & Co. KG, Lennestadt, DE;
Inventors:
Franz-Josef Püttmann, Lennestadt, DE;
Sadri Samadraxha, Kirchhundem, DE;
Assignee:
TRACTO-TECHNIK GmbH & Co. KG, Lennestadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/06 (2006.01); B25D 9/26 (2006.01); E21B 1/38 (2006.01); B25D 9/12 (2006.01); E21B 4/14 (2006.01); E21B 6/00 (2006.01); E21B 44/00 (2006.01);
U.S. Cl.
CPC ...
B25D 9/26 (2013.01); B25D 9/12 (2013.01); E21B 1/38 (2020.05); E21B 4/06 (2013.01); E21B 4/145 (2013.01); E21B 6/00 (2013.01); E21B 44/00 (2013.01);
Abstract
A percussion drilling device for drilling in earth includes at least one housing section for a main piston, and a ring insert arranged in the housing section in front of the main piston so that the ring insert transmits at least part of the energy of the main piston onto the housing. The ring insert is attached to the housing by a shrink-fit connection.