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. 11, 2025
Filed:
Aug. 01, 2022
Applicant:
Sandvik Mining and Construction Australia (Production/supply) Pty Ltd, Queensland, AU;
Inventors:
Mietek Rataj, New South Wales, AU;
Bradley Darlington, New South Wales, AU;
Warren Roach, New South Wales, AU;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 21/00 (2006.01);
U.S. Cl.
CPC ...
E21D 21/004 (2013.01); E21D 21/0033 (2013.01); E21D 21/008 (2013.01);
Abstract
A rock bolt includes a wedge-based expansion mechanism. The expansion mechanism includes a drive wedge arranged to expand an intermediate wedge upon tensioning of the rock bolt, wherein the intermediate wedge is arranged to expand a wedge device attached to an outer tube of the rock bolt. The use of the intermediate wedge enables greater expansion of the rock bolt.