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:
Feb. 22, 2011
Filed:
Sep. 23, 2005
Applicants:
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Erkki Ahola, Kangasala, FI;
Mauri Esko, Ikaalinen, FI;
Aimo Helin, Tampere, FI;
Inventors:
Markku Keskiniva, Tampere, FI;
Jorma Mäki, Mutala, FI;
Erkki Ahola, Kangasala, FI;
Mauri Esko, Ikaalinen, FI;
Aimo Helin, Tampere, FI;
Assignee:
Sandvik Mining & Construction OY, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for breaking rock to be drilled in rock drilling, in which method the rock to be drilled is subjected to successive stress pulses via a tool. The method comprises stress pulses being exerted on the rock at a high frequency, and the load proportion calculated on the basis of the values of the frequency and the length (t) of the stress wave being at least 0.075.