E21F 13/066
Scraper chain conveyors
Official title: {Scraper chain conveyors (in general B65G19/00)}
E21F13/066 (Scraper chain conveyors) appears on 78 US grants and 49 published applications in this corpus.
Search patents in E21F- Granted patents
- 78
- Published applications
- 49
- Assignees
- 31
- Inventors
- 149
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 8 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 7 |
| 2013 | 2 | 1 |
| 2014 | 6 | 5 |
| 2015 | 7 | 2 |
| 2016 | 1 | 2 |
| 2017 | 3 | 5 |
| 2018 | 3 | 10 |
| 2019 | 10 | 3 |
| 2020 | 4 | 6 |
| 2021 | 3 | 1 |
| 2022 | 4 | 2 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for detecting full-length fluctuation state of scraper conveyor of fully-mechanized coal mining working face24 Jun 2025US 12,339,117 B2Tiandi Science & Technology Co., Ltd
- Chain conveyor and link for same20 Dec 2022US 11,530,095 B2Joy Global Underground Mining LLC
- Chain conveyor13 Sep 2022US 11,440,736 B2Joy Global Underground Mining LLC
- Device and method for distributed detection of straightness of working face of scraper conveyor based on optical fiber sensing2 Aug 2022US 11,402,196 B2China University of Mining and Technology
- Chain conveyor and link for same17 May 2022US 11,332,316 B2Joy Global Underground Mining LLC
- 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
- System and method for detecting full-length fluctuation state of scraper conveyor of fully-mechanized coal mining working face21 Sep 2023US 2023/0296376 A1Tiandi Science & Technology Co., Ltd
- Sensing method for collecting multivariate information at a goaf side based on chutes of scraper conveyors1 Dec 2022US 2022/0380133 A1Shandong University of Science and Technology
- Device and method for distributed detection of straightness of working face of scraper conveyor based on optical fiber sensing12 May 2022US 2022/0144554 A1China University of Mining and Technology
- Chain conveyor5 Aug 2021US 2021/0237979 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Scraper-chain conveyors32US 4,037,713 AGewerkschaft Eisenhutte Westfalia · 1977
- Automatic longwall mining system and method26US 4,228,508 ABergwerksverband GmbH · 1980
- Scraper chain conveyor23US 4,332,317 AKloeckner-Werke AG · 1982
- Extraction device, particularly for mining, and method for controlling the extraction device21US 8,550,236 B2Caterpillar Global Mining Europe GmbH · 2013
- Fiber optic cable protection in a mining system17US 8,622,481 B2Joy MM Delaware, Inc. · 2014