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:
Jul. 08, 2025
Filed:
Jun. 30, 2022
Applicant:
Sandvik Mining and Construction Oy, Tampere, FI;
Inventors:
Sirpa Launis, Tampere, FI;
Jukka-Pekka Uusitalo, Tampere, FI;
Jenni Rekola, Tampere, FI;
Matthias Voigt, Tampere, FI;
Erik Anders, Tampere, FI;
Assignee:
Sandvik Mining and Construction Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/15 (2006.01); E21B 21/08 (2006.01);
U.S. Cl.
CPC ...
E21B 7/15 (2013.01); E21B 21/08 (2013.01);
Abstract
An apparatus, drilling arrangement and method for high voltage electro pulse drilling of rock. The apparatus includes a switch having two electrodes spaced at a distance from each other. The switch is located in connection with a drilling tool. The switch may be surrounded by a chamber, which prevents flushing fluid entering between a switch gap of the electrodes.