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:
Jan. 15, 2008
Filed:
May. 12, 2004
Applicants:
Morgan Kanflod, Örebro, SE;
Fredrik Öberg, Örebro, SE;
Inventors:
Morgan Kanflod, Örebro, SE;
Fredrik Öberg, Örebro, SE;
Assignee:
Atlas Copco Rock Drills AB, Orebro, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 20/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Method and device for rock bolting, wherein a tubular bolt () with closed cross-section is inserted and expanded for anchoring inside a bore hole (), wherein the tubular bolt is expanded to contact in the inner portion of the bore hole, a tension element () which is arranged in the outer portion of the bore hole with an inner part () attached to the tubular bolt () is pre-stressed and a settable medium is injected into the outer portion of the bore hole () between () the tension element and the wall of the bore hole and is allowed to set.