E21C 31/04
Imparting both a rotary and reciprocating motion
Official title: imparting both a rotary and reciprocating motion
E21C31/04 (Imparting both a rotary and reciprocating motion) appears on 13 US grants and 8 published applications in this corpus.
Search patents in E21C- Granted patents
- 13
- Published applications
- 8
- Assignees
- 8
- Inventors
- 28
- Latest grant
- 17 Sep 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 3 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Roadway/tunnel excavation robot and automatic cutting control method17 Sep 2024US 12,091,977 B2China University of Mining and Technology
- Gravel excavation system2 Aug 2022US 11,401,809 B2Northern Colorado Constructors, Inc.
- Mining machine with multiple cutter heads29 Dec 2020US 10,876,399 B2Joy Global Underground Mining LLC
- Mining machine with multiple cutter heads17 Sep 2019US 10,415,384 B2Joy Global Underground Mining LLC
- Non-concentric protruding shaft fixed bearing reciprocating impact part for implementing reciprocating impact part non-concentric protruding shaft fixed bearing method3 Sep 2019US 10,400,597 B2
- Roadway/tunnel excavation robot and automatic cutting control method2 May 2024US 2024/0141784 A1China University of Mining and Technology
- Gravel excavation system14 Oct 2021US 2021/0317740 A1Northern Colorado Constructors, Inc.
- Mining machine with multiple cutter heads9 Jan 2020US 2020/0011173 A1Joy Global Underground Mining LLC
- Mining machine with multiple cutter heads27 Jul 2017US 2017/0211383 A1Joy Global Underground Mining LLC
- Reciprocating impact slack-drop/rotating/raking multifunctional power shaft12 Jan 2017US 2017/0009579 A1
Most cited
By later US patents
- Oscillating disk thin seam mining machine with steering22US 4,045,088 A1977
- Mining machine with driven disc cutters15US 8,636,324 B2Joy MM Delaware, Inc. · 2014
- Cutter drum assembly for a continuous mining machine8US 4,310,199 ANational Mine Service Company · 1982
- Drum cutter mining machine5US 4,189,188 AGebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. · 1980
- Driving arrangement for longwall mining machines4US 4,453,774 AGebr. Eickhoff Maschinefabrik und Eisengiesserei m.b.H. · 1984