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:
Oct. 03, 2006
Filed:
Oct. 17, 2002
Markku Keskiniva, Tampere, FI;
Markku Keskiniva, Tampere, FI;
Sandvik Tamrock Oy, Tampere, FI;
Abstract
The rock drill apparatus () comprises a rock drill machine () provided with a percussion device (), a feed device () and a tool (), the tool () end comprising a bit () for breaking rock. The tool () is arranged to transmit impact energy generated by the percussion device () as a compression stress wave to the bit. The feed device () is arranged to thrust the tool () and the bit () against the rock to be drilled, whereby on drilling at least part of the compression stress wave generated by the percussion device () to the tool () reflects from the rock to be drilled back to the tool () as tensile stress, and impact energy of the percussion device () is adjusted on the basis of the level of tensile stress (σ) reflecting from the rock.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile