E21F 13/00
Transport specially adapted to underground conditions
Official title: Transport specially adapted to underground conditions (mine cars B61D; transport in general, loading {unless specially adapted to underground conditions} B65G)
E21F13/00 (Transport specially adapted to underground conditions) appears on 476 US grants and 356 published applications in this corpus.
Search patents in E21F- Granted patents
- 476
- Published applications
- 356
- Assignees
- 245
- Inventors
- 952
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 14 | 0 |
| 1978 | 17 | 0 |
| 1979 | 13 | 0 |
| 1980 | 12 | 0 |
| 1981 | 12 | 0 |
| 1982 | 14 | 0 |
| 1983 | 7 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 1 |
| 2002 | 3 | 4 |
| 2003 | 6 | 4 |
| 2004 | 5 | 11 |
| 2005 | 2 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 6 |
| 2008 | 2 | 8 |
| 2009 | 3 | 7 |
| 2010 | 6 | 13 |
| 2011 | 12 | 10 |
| 2012 | 8 | 20 |
| 2013 | 10 | 28 |
| 2014 | 28 | 19 |
| 2015 | 22 | 21 |
| 2016 | 9 | 26 |
| 2017 | 27 | 34 |
| 2018 | 27 | 25 |
| 2019 | 33 | 18 |
| 2020 | 19 | 19 |
| 2021 | 13 | 19 |
| 2022 | 10 | 16 |
| 2023 | 10 | 9 |
| 2024 | 14 | 14 |
| 2025 | 9 | 13 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21F 13/06Transport of mined material at or adjacent to the working face169
- E21F 13/02Transport of mined mineral in galleries118
- E21F 13/08Shifting conveyors or other transport devices from one location at the working75
- E21F 13/04Transport of mined material in gravity inclines48
- E21F 13/006Equipment transport systems34
- E21F 13/002Crushing devices specifically for conveying in mines26
- E21F 13/004Staff transport system13
- E21F 13/10Anchorings for conveyors10
Recent patents
- Autonomous mining vehicle control1 Sep 2026US 12,723,511 B2Sandvik Mining and Construction Oy
- Mining system with a flexible conveyor system1 Sep 2026US 12,723,512 B2Underground Extraction Technologies Pty LTD
- Towing arrangement of a battery-powered mining machine and a battery-powered mining machine25 Aug 2026US 12,715,254 B2Sandvik Mining and Construction Oy
- Method of operating a mining hoist4 Aug 2026US 12,698,711 B2ABB Schweiz AG
- Methods and systems for mining16 Jun 2026US 12,654,962 B2Technological Resources Pty. Limited
- Steep-angle thermoplastic elastomer belts and belts made from a combination of a rubber and thermoplastic elastomers with thermoplastic abrasive and impact resistant chevron cleats for mining and heavy industrial applications1 Oct 2026US 2026/0296792 A1ContiTech Deutschland GmbH
- Monorail installation device1 Oct 2026US 2026/0298090 A1Sandvik Mining and Construction Oy
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Lightweight material carrier16 Jul 2026US 2026/0200537 A1Anglo American Technical & Sustainability Services Ltd
- Double-end chain tension force control system for cross side-dumping type flight conveyor and control method therefor16 Apr 2026US 2026/0103984 A1Taiyuan University of Technology
Most cited
By later US patents
- Modular mine service vehicle101US 7,441,809 B1Oldenburg Group Incorporated · 2008
- Method and system for winning minerals69US 3,961,824 A1976
- Vehicle with selectively useable wheel sets54US 4,527,486 ASaturn Machine & Welding Co., Inc. · 1985
- Apparatus and method for continuous mining45US 5,112,111 AAddington Resources, Inc. · 1992
- Shuttle car loading system35US 4,537,554 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1985