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:
Dec. 26, 2006
Filed:
Feb. 02, 2004
Applicant:
Leif Nordfeldt, Soderbarke, SE;
Inventor:
Leif Nordfeldt, Soderbarke, SE;
Assignee:
Atlas Copco Secoroc AB, Fagersta, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A connection rod () for rock drilling includes a first rod part () whidh has an external thread () provided at one end thereof, wherein the end of the rod opposite to the one end includes an end portion () which carries an internal thread (), wherein the end portion () is joind to the first rod part () by friction welding and wherein the end portion () has been heat treated prior to being joined to the first rod part (). The invention also relates to a method of producing such a connection rod.