Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12252937 | Drilling device with fluid column resonator | — | 2025-03-18 |
| 12146387 | Flapper valve for percussion drill tools | Ben Sexton | 2024-11-19 |
| 12024950 | Flushing and connection arrangements for percussion drill tools | Ben Sexton | 2024-07-02 |
| 11725456 | Hydraulic down-the-hole hammer and subsea pile | Joseph Purcell | 2023-08-15 |
| 11319755 | Arrangement and method for installing casing | — | 2022-05-03 |
| 9138879 | Method and arrangement for lubricating drill shank of rock drilling machine | Juha Piispanen, Mauri Esko, Aimo Helin | 2015-09-22 |
| 9108311 | Percussion device | Juha Piispanen, Mauri Esko | 2015-08-18 |
| 9067310 | Sealing arrangement in rotating control valve of pressure fluid-operated percussion device | Juha Piispanen, Mauri Esko | 2015-06-30 |
| 8151901 | Impact device and method for generating stress pulse therein | Jorma Maki, Mauri Esko, Erkki Ahola, Aimo Helin, Timo Muuttonen | 2012-04-10 |
| 8061434 | Percussion device | Jorma Maki, Mauri Esko, Erkki Ahola | 2011-11-22 |
| 7895900 | Measuring device, rock breaking device and method of measuring stress wave | Vesa Uitto, Heimo Ihalainen, Jukka Lekkala | 2011-03-01 |
| 7891437 | Method for breaking rock | Jorma Maki, Erkki Ahola, Mauri Esko, Aimo Helin | 2011-02-22 |
| 7878263 | Pressure-fluid-operated percussion device | Jorma Maki, Mauri Esko, Erkki Ahola, Aimo Helin | 2011-02-01 |
| 7836969 | Method for controlling pressure fluid operated percussion device, and percussion device | Erkki Ahola, Mauri Esko, Aimo Helin, Jorma Maki, Juha Piispanen | 2010-11-23 |
| 7743851 | Method and rock drilling rig for hole drilling | Mauri Esko, Jorma Maki, Aimo Helin, Juha Piispanen, Erkki Ahola | 2010-06-29 |
| 7717190 | Method for controlling percussion device, software production, and percussion device | Jorma Maki, Aimo Helin, Mauri Esko, Erkki Ahola | 2010-05-18 |
| 7441608 | Percussion device with a transmission element compressing an elastic energy storing material | Erkki Ahola, Ari Kotala | 2008-10-28 |
| 7322425 | Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device | Jorma Maki, Mauri Esko, Erkki Ahola, Aimo Helin, Timo Muuttonen | 2008-01-29 |
| 7290622 | Impact device with a rotable control valve | Jorma Maki, Mauri Esko, Erkki Ahola | 2007-11-06 |
| 7252154 | Percussion device with a transmission element compressing an elastic energy storing material | Erkki Ahola, Ari Kotala | 2007-08-07 |
| 7178447 | Control valve and a method for a percussion device with a working cycle involving several coupling moments | Antti Koskimaki, Jorma Maki, Mauri Esko, Erkki Ahola, Aimo Helin | 2007-02-20 |
| 7174824 | Control valve in a percussion device and a method comprising a closed pressure space at the end position of the piston | Antti Koskimaki, Jorma Maki, Erkki Ahola | 2007-02-13 |
| 7114576 | Method and arrangement of controlling of percussive drilling based on the stress level determined from the measured feed rate | — | 2006-10-03 |
| 7051525 | Method and apparatus for monitoring operation of percussion device | Timo Kemppainen, Vesa Uitto | 2006-05-30 |
| 7013996 | Impact device | Jorma Maki, Erkki Ahola, Esa Rantala | 2006-03-21 |