E21C 27/32
By adjustable or non-adjustable planing means with or without loading arrangements
Official title: by adjustable or non-adjustable planing means with or without loading arrangements (by percussed planing means E21C27/46)
E21C27/32 (By adjustable or non-adjustable planing means with or without loading arrangements) appears on 102 US grants and 40 published applications in this corpus.
Search patents in E21C- Granted patents
- 102
- Published applications
- 40
- Assignees
- 36
- Inventors
- 120
- Latest grant
- 19 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 9 | 0 |
| 1980 | 9 | 0 |
| 1981 | 8 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 3 |
| 2008 | 3 | 0 |
| 2009 | 1 | 1 |
| 2010 | 0 | 5 |
| 2011 | 1 | 2 |
| 2012 | 2 | 3 |
| 2013 | 5 | 2 |
| 2014 | 4 | 3 |
| 2015 | 4 | 4 |
| 2016 | 4 | 3 |
| 2017 | 1 | 3 |
| 2018 | 1 | 2 |
| 2019 | 3 | 1 |
| 2020 | 2 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- E21C 27/34Machine propelled along the working face by cable or chain51
- E21C 27/44Planing knives8
- E21C 27/36Machine self-propelled along the working face6
- E21C 27/38Machine stationary while planing in an arc3
- E21C 27/40Machine and its planing tool making alternative step-wise movements along the working0
- E21C 27/42Combined with scraper or collector box0
Recent patents
- Self-propelled milling machine, as well as method for controlling a self-propelled milling machine19 Sep 2023US 11,761,155 B2Wirtgen GmbH
- Self-propelled milling machine, as well as method for controlling a self-propelled milling machine11 Oct 2022US 11,466,412 B2Wirtgen GmbH
- Metering hydraulic control system for mining machine8 Jun 2021US 11,028,862 B2Sandvik Intellectual Property AB
- Shearing system for longwall mining24 Nov 2020US 10,844,713 B2Caterpillar Global Mining Europe GmbH
- Self-propelled milling machine, as well as method for controlling a self-propelled milling machine25 Aug 2020US 10,753,052 B2Wirtgen GmbH
- A cutting head assembly19 Sep 2024US 2024/0309761 A1Optima Mining Systems Pty Ltd
- Self-propelled milling machine, as well as method for controlling a self-propelled milling machine25 May 2023US 2023/0160156 A1Wirtgen GmbH
- Metering hydraulic control system for mining machine6 May 2021US 2021/0131066 A1Sandvik Intellectual Property AB
- Self-propelled milling machine, as well as method for controlling a self-propelled milling machine28 Jan 2021US 2021/0025119 A1Wirtgen GmbH
- Shearing system for longwall mining13 Feb 2020US 2020/0049004 A1Caterpillar Global Mining Europe GmbH
Most cited
By later US patents
- Mining machine with driven disc cutters44US 7,934,776 B2Joy MM Delaware, Inc. · 2011
- Rock cutting tip inserts34US 4,194,790 ACoal Industry (Patents) Limited · 1980
- Continuously operating mining machines with plow and conveyor chains and method of operating same31US 5,647,640 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1997
- Mining machine with driven disc cutters23US 8,328,292 B2Joy MM Delaware, Inc. · 2012
- Non-rotary mining cutter with recessed nozzle insert21US 4,280,735 AGewerkschaft Eisenhutte Westfalia · 1981