Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9138879 | Method and arrangement for lubricating drill shank of rock drilling machine | Markku Keskiniva, Juha Piispanen, Aimo Helin | 2015-09-22 |
| 9108311 | Percussion device | Markku Keskiniva, Juha Piispanen | 2015-08-18 |
| 9067310 | Sealing arrangement in rotating control valve of pressure fluid-operated percussion device | Markku Keskiniva, Juha Piispanen | 2015-06-30 |
| 8151901 | Impact device and method for generating stress pulse therein | Markku Keskiniva, Jorma Maki, Erkki Ahola, Aimo Helin, Timo Muuttonen | 2012-04-10 |
| 8061434 | Percussion device | Markku Keskiniva, Jorma Maki, Erkki Ahola | 2011-11-22 |
| 7891437 | Method for breaking rock | Markku Keskiniva, Jorma Maki, Erkki Ahola, Aimo Helin | 2011-02-22 |
| 7878263 | Pressure-fluid-operated percussion device | Markku Keskiniva, Jorma Maki, Erkki Ahola, Aimo Helin | 2011-02-01 |
| 7836969 | Method for controlling pressure fluid operated percussion device, and percussion device | Erkki Ahola, Aimo Helin, Markku Keskiniva, Jorma Maki, Juha Piispanen | 2010-11-23 |
| 7743851 | Method and rock drilling rig for hole drilling | Markku Keskiniva, Jorma Maki, Aimo Helin, Juha Piispanen, Erkki Ahola | 2010-06-29 |
| 7717190 | Method for controlling percussion device, software production, and percussion device | Markku Keskiniva, Jorma Maki, Aimo Helin, 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, Erkki Ahola, Aimo Helin, Timo Muuttonen | 2008-01-29 |
| 7290622 | Impact device with a rotable control valve | Markku Keskiniva, Jorma Maki, Erkki Ahola | 2007-11-06 |
| 7178447 | Control valve and a method for a percussion device with a working cycle involving several coupling moments | Antti Koskimaki, Markku Keskiniva, Jorma Maki, Erkki Ahola, Aimo Helin | 2007-02-20 |
| 6009957 | Arrangement in a feed beam of a rock drill | Heikki Jantunen, Timo Laitinen, Leo Hakkinen | 2000-01-04 |
| 5896935 | Arrangement in boom for rock drilling unit | Pauli Lemmetty | 1999-04-27 |