Class E21B : EARTH OR ROCK DRILLING
Subclass 1/24: Percussion drilling (drives used in the borehole E21B 4/00) with a reciprocating impulse member (E21B 1/02, E21B 1/38 take precedence) the impulse member being a piston driven directly by fluid pressure
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12252937 | Drilling device with fluid column resonator | Nov 05, 21 | Mar 18, 25 | MINCON INTERNATIONAL LIMITED |
| 11933143 | Pressurized fluid flow system for percussive mechanisms | Nov 22, 22 | Mar 19, 24 | Not available |
| 11821312 | Drilling rig and methods using multiple types of drilling for installing geothermal systems | Dec 20, 19 | Nov 21, 23 | Terra Sonic International, LLC |
| 11028643 | Down the hole drilling machine and method for drilling rock | May 31, 18 | Jun 08, 21 | Sandvik Intellectual Property AB |
| 10456898 | Damping device for a percussion device, percussion device and rock drilling machine | Jan 16, 15 | Oct 29, 19 | Epiroc Rock Drills Aktiebolag |
| 8141660 | Excavator apparatus for underground excavation | Nov 29, 07 | Mar 27, 12 | Not available |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0374,859 | RECIPROCATING DRIVE APPARATUS | Dec 16, 21 | Nov 23, 23 | Rotojar Innovations Limited |
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