Description
Class E21D : SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
Subclass 1/06: Sinking shafts mechanically (E21D 1/08 takes precedence) with shaft-boring cutters (drilling machines E21B)
E21D 1/06
Sub-Class
Stats
- 18 US PATENTS IN FORCE
- 1 US APPLICATIONS PENDING
- 9 Total Patent Owners
- 113 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12031385 | Drill head and method for producing a vertical borehole in the ground | Jul 21, 20 | Jul 09, 24 | HERRENKNECHT AG |
| 11891865 | Full-face shaft tunnel boring machine system | Aug 25, 23 | Feb 06, 24 | HEFEI DESIGN & RESEARCH INSTITUTE OF COAL INDUSTRY CO., LTD; University of Science and Technology Beijing; CHINA COAL NO.3 CONSTRUCTION CORPORATION (GROUP) LTD; ANSTEEL GROUP MINING CORPORATION LIMITED; |
| 10947845 | Shaft enlargement arrangement for a boring system | Sep 21, 17 | Mar 16, 21 | MASTER SINKERS (PTY) LTD |
| 10697246 | Shaft enlargement arrangement for a boring system | Jan 25, 16 | Jun 30, 20 | MASTER DRILLING SOUTH AFRICA (PTY) LTD. |
| 10202807 | Vertical shaft drilling rig using novel drilling method | Dec 09, 14 | Feb 12, 19 | Not available |
| 9995086 | Center-pillared full-face shaft drilling machine | Dec 09, 14 | Jun 12, 18 | Not available |
| 9995138 | Device for sinking a shaft and method for sinking a shaft | Jun 02, 14 | Jun 12, 18 | HERRENKNECHT AKTIENGESELLSCHAFT |
| 9144921 | Method for wire saw excavation | Feb 27, 15 | Sep 29, 15 | KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS |
| 8905486 | Underground mining | Jun 30, 10 | Dec 09, 14 | TECHNOLOGICAL RESOURCES PTY. LIMITED |
| 8887833 | Reamer assembly | Aug 22, 11 | Nov 18, 14 | EARTH TOOL COMPANY, LLC |
| 8757731 | Method for introducing a vertical shaft and shaft driving machine | Jun 14, 13 | Jun 24, 14 | Herrenknecht AG |
| 7891439 | Method of multistage manufacturing a ground bore | Mar 28, 08 | Feb 22, 11 | TRACTO-TECHNIK GMBH & CO. KG |
| 7699123 | Bore hole sleeve reaming apparatus and method | May 28, 08 | Apr 20, 10 | Not available |
| 7617888 | Pilot tube system and attachment mechanism for auger boring machine | Mar 07, 07 | Nov 17, 09 | Not available |
| 7389829 | Method and apparatus for forming bored hole | May 20, 03 | Jun 24, 08 | DIMITROFF, TED R. |
| 7137460 | Back reaming tool | Mar 17, 04 | Nov 21, 06 | SANDVIK INTELLECTUAL PROPERTY AB |
| 6953306 | Method of accurate trenchless installation of underground pipe | Jan 27, 04 | Oct 11, 05 | INA ACQUISITION CORP., INSITUFORM (NETHERLANDS) B.V., |
| 6682264 | Method of accurate trenchless installation of underground pipe | Feb 26, 02 | Jan 27, 04 | INA ACQUISITION CORP. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2020/0018,163 | SHAFT ENLARGEMENT ARRANGEMENT FOR A BORING SYSTEM | Sep 21, 17 | Jan 16, 20 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 29 Months (last 2 years Issuances)
- 29 Months (last 5 years Issuances)