Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9138879 | Method and arrangement for lubricating drill shank of rock drilling machine | Markku Keskiniva, Juha Piispanen, Mauri Esko | 2015-09-22 |
| 8151901 | Impact device and method for generating stress pulse therein | Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola, Timo Muuttonen | 2012-04-10 |
| 7891437 | Method for breaking rock | Markku Keskiniva, Jorma Maki, Erkki Ahola, Mauri Esko | 2011-02-22 |
| 7878263 | Pressure-fluid-operated percussion device | Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola | 2011-02-01 |
| 7836969 | Method for controlling pressure fluid operated percussion device, and percussion device | Erkki Ahola, Mauri Esko, Markku Keskiniva, Jorma Maki, Juha Piispanen | 2010-11-23 |
| 7743851 | Method and rock drilling rig for hole drilling | Markku Keskiniva, Mauri Esko, Jorma Maki, Juha Piispanen, Erkki Ahola | 2010-06-29 |
| 7717190 | Method for controlling percussion device, software production, and percussion device | Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola | 2010-05-18 |
| 7322425 | Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device | Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola, Timo Muuttonen | 2008-01-29 |
| 7178447 | Control valve and a method for a percussion device with a working cycle involving several coupling moments | Antti Koskimaki, Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola | 2007-02-20 |
| 7128172 | Drill string for upward drilling and components therefor | Vlado Cosic | 2006-10-31 |
| 6186246 | Method for adjusting drilling of drilling machine and rock drill | Timo Muuttonen, Timo Kiikka, Jorma Maki, Pekka Salminen | 2001-02-13 |
| 4369848 | Control system for a rock drill | Pekka Salmi | 1983-01-25 |
| 4355691 | Hydraulic drilling apparatus | Esa Karru, Pekka Salmi, Hannu Paasonen | 1982-10-26 |