E21C 25/14
With equipment for cleaning the slit
Official title: with equipment for cleaning the slit (associated with cutter chain machines E21C25/50)
E21C25/14 (With equipment for cleaning the slit) appears on 7 US grants and 1 published applications in this corpus.
Search patents in E21C- Granted patents
- 7
- Published applications
- 1
- Assignees
- 8
- Inventors
- 7
- Latest grant
- 10 May 2005
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 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 | 1 |
| 2005 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cutting drum web deflector10 May 2005US 6,890,037 B2Joy M M Delaware, Inc.
- Method of indirect measurement of cowl position on a longwall shearer7 May 1991US 5,013,091 AConsolidation Coal Company
- Apparatus for use with cutting drums of mineral machines21 Jun 1983US 4,389,073 AGewerkschaft Eisenhutte Westfalia
- Cowl assembly for longwall mining machine31 Aug 1982US 4,346,939 AGerb. Eickhoff Machinenfabrik und Eisengiesserei m.b.H.
- Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine17 Feb 1981US 4,251,112 AGeb. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H.
Most cited
By later US patents
- Cutting drum web deflector9US 6,890,037 B2Joy M M Delaware, Inc. · 2005
- Equipment for laying elongate material5US 4,196,935 ACoal Industry (Patents) Limited · 1980
- Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine4US 4,251,112 AGeb. Eickhoff Maschinenfabrik und Eisengiesserei m.b.H. · 1981
- Cowl assembly for longwall mining machine4US 4,346,939 AGerb. Eickhoff Machinenfabrik und Eisengiesserei m.b.H. · 1982
- Adjustable gage cutter scraper for tunneling machines3US 3,989,115 ADresser Industries, Inc. · 1976