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:
May. 19, 2015
Filed:
May. 28, 2010
Jarno Viitaniemi, Tampere, FI;
Vesa Peltonen, Tampere, FI;
Markus Saarela, Tampere, FI;
Juho Seppälä, Tampere, FI;
Jarno Viitaniemi, Tampere, FI;
Vesa Peltonen, Tampere, FI;
Markus Saarela, Tampere, FI;
Juho Seppälä, Tampere, FI;
Sandvik Mining and Construction Oy, Tampere, FI;
Abstract
Method and apparatus for controlling rock drilling with a percussion device belonging to a rock drill to deliver stress waves to rock through a tool by pushing the tool against the rock by means of a feed motor and rotating simultaneously the tool by means of a rotation motor, whereby the maximum feed force is determined, pressure medium is supplied to the feed motor and to the rotation motor and the feed force is controlled according to the drilling conditions. The feed force is controlled on the basis of the feed speed and the rotation torque. The apparatus has a load control valve which controls the feed.