Class E21C : MINING OR QUARRYING
Subclass 25/10: Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (dislodging machines with slitting means E21C 27/02, E21C 27/1, E21C 27/18) Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate Rods; Drums
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12049824 | Distributed coal cutting device for longwall face of coal mine | Jul 26, 22 | Jul 30, 24 | Not available |
| 12006824 | Cutting assembly for longwall mining system | Nov 15, 21 | Jun 11, 24 | Joy Global Underground Mining LLC |
| 11933002 | Rolling wedge cutter drum | Mar 11, 22 | Mar 19, 24 | Not available |
| 11719099 | Milling machine and method for operating a milling machine | Jan 24, 22 | Aug 08, 23 | Wirtgen GmbH |
| 11629594 | Cutting head for rock cutting machine | Sep 03, 21 | Apr 18, 23 | Joy Global Underground Mining LLC |
| 11603631 | Self-propelled construction machine and method for operating a self- propelled construction machine | May 18, 21 | Mar 14, 23 | Wirtgen GmbH |
| 11555403 | Cutting pick monitoring system and method for longwall mining system | Mar 12, 21 | Jan 17, 23 | Joy Global Underground Mining LLC |
| 11506585 | Wear prognosis method and maintenance method | Sep 12, 19 | Nov 22, 22 | Wirtgen GmbH |
| 11401808 | Earth working machine and method for wear-optimized operation of an earth working machine | May 09, 19 | Aug 02, 22 | Wirtgen GmbH |
| 11384638 | Apparatus for controllably unfolding flexible mesh for continuous miner, and continuous miner | Oct 29, 18 | Jul 12, 22 | China University of Mining and Technology |
| 11346065 | Self-propelled construction machine and method for working ground pavements | Jun 10, 20 | May 31, 22 | Wirtgen GmbH |
| 11274551 | Material handling apparatus for a mining machine | Mar 29, 18 | Mar 15, 22 | Sandvik Mining and Construction G.m.b.H. |
| 11236611 | Milling machine and method for operating a milling machine | Dec 10, 19 | Feb 01, 22 | Wirtgen GmbH |
| 11203929 | Milling machine and process for the operation of a milling machine | Aug 08, 19 | Dec 21, 21 | Wirtgen GmbH |
| 11105052 | Self-propelled construction machine and method for working a ground pavement | Oct 23, 19 | Aug 31, 21 | Wirtgen GmbH |
| 11052495 | Block positioning tool | Aug 13, 18 | Jul 06, 21 | Caterpillar Paving Products Inc. |
| 11015304 | Self-propelled construction machine and method for operating a self-propelled construction machine | Jul 02, 19 | May 25, 21 | Wirtgen GmbH |
| 10968575 | Earth working machine having an insertable operating seat | Jan 09, 19 | Apr 06, 21 | Wirtgen GmbH |
| 10954784 | Shearer cutting unit with double-speed rollers | Apr 23, 18 | Mar 23, 21 | SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY |
| 10920588 | Adaptive pitch steering in a longwall shearing system | Jun 01, 18 | Feb 16, 21 | Joy Global Underground Mining LLC |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0328,315 | CUTTING ASSEMBLY FOR LONGWALL MINING SYSTEM | Jun 10, 24 | Oct 03, 24 | Not available |
| 2024/0240,560 | Tunnel Tunneling System | Jun 01, 22 | Jul 18, 24 | Not available |
| 2024/0200,451 | Tunneling and Anchoring Machine and Tunneling System | May 27, 22 | Jun 20, 24 | Not available |
| 2024/0026,787 | Milling Machine And Method For Operating A Milling Machine | Jun 16, 23 | Jan 25, 24 | Not available |
| 2023/0105,339 | Earth Working Machine And Method For Wear-Optimized Operation Of An Earth Working Machine | Jul 12, 22 | Apr 06, 23 | Not available |
| 2022/0170,367 | Milling machine and process for the operation of a milling machine | Dec 14, 21 | Jun 02, 22 | Not available |
| 2022/0074,305 | CUTTING HEAD FOR ROCK CUTTING MACHINE | Sep 03, 21 | Mar 10, 22 | Not available |
| 2020/0400,019 | DRUM-TYPE SHEARER LOADER, AND A SHEARER DRUM OF A DRUM-TYPE SHEARER LOADER | Feb 12, 19 | Dec 24, 20 | Not available |
| 2020/0263,540 | SHEARER CUTTING UNIT WITH DOUBLE-SPEED ROLLERS | Apr 23, 18 | Aug 20, 20 | SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY |
| 2019/0360,333 | Earth Working Machine And Method For Wear-Optimized Operation Of An Earth Working Machine | May 09, 19 | Nov 28, 19 | Not available |
| 2018/0328,174 | ROTOR FOR MACHINE | May 15, 17 | Nov 15, 18 | Caterpillar Paving Products Inc. |
| 2017/0335,686 | EDGE CUTTING ELEMENT FOR ROTATABLE CUTTING DRUM | Nov 10, 15 | Nov 23, 17 | VERMEER MANUFACTURING COMPANY |
| 2014/0368,022 | Mineral Winning Pick, Pick Holder, And Combination | Jun 18, 14 | Dec 18, 14 | ESCO CORPORATION |
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