E21B 21/015
Means engaging the bore entrance
Official title: Means engaging the bore entrance, e.g. hoods for collecting dust
E21B21/015 (Means engaging the bore entrance) appears on 73 US grants and 45 published applications in this corpus.
Search patents in E21B- Granted patents
- 73
- Published applications
- 45
- Assignees
- 46
- Inventors
- 168
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 2 | 2 |
| 2009 | 0 | 5 |
| 2010 | 4 | 4 |
| 2011 | 6 | 2 |
| 2012 | 2 | 1 |
| 2013 | 2 | 0 |
| 2014 | 1 | 2 |
| 2015 | 2 | 4 |
| 2016 | 3 | 0 |
| 2017 | 0 | 2 |
| 2018 | 3 | 0 |
| 2019 | 0 | 3 |
| 2020 | 2 | 2 |
| 2021 | 4 | 1 |
| 2022 | 0 | 4 |
| 2023 | 1 | 1 |
| 2024 | 5 | 4 |
| 2025 | 2 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sampling pipe of a sampling arrangement21 Jul 2026US 12,687,077 B2Erimek Oy
- Apparatus and method for supporting a collar region of a blast hole during drilling31 Mar 2026US 12,590,496 B2Aquirian Technology Pty Ltd
- Lifting assembly for dust curtain of work machine12 Aug 2025US 12,385,335 B1Caterpillar Global Mining Equipment LLC
- Device for extracting drilling sludge and the use thereof15 Jul 2025US 12,358,091 B2Hilti Aktiengesellschaft
- Inlet tube, rock drilling rig and method of sampling24 Dec 2024US 12,173,570 B2Sandvik Mining and Construction Oy
- Collection device for corner regions1 Oct 2026US 2026/0298041 A1Hilti Aktiengesellschaft
- System for collecting drilling slurry10 Sep 2026US 2026/0266147 A1Hilti Aktiengesellschaft
- Sampling system, dust removal arrangement, and method for taking sample30 Apr 2026US 2026/0118231 A1Erimek Oy
- Sampling pipe of a sampling arrangement9 Apr 2026US 2026/0098449 A1Erimek Oy
- Lifting assembly for dust curtain of work machine14 Aug 2025US 2025/0257619 A1Caterpillar Global Mining Equipment LLC
Most cited
By later US patents
- Drilling or chiseling tool with suction apparatus97US 5,467,835 AHilti Aktiengesellschaft · 1995
- Dust conveying and collecting system and method51US 4,434,861 A1984
- Method and a machine of obtaining samples from the ground to determine its composition32US 4,332,301 A1982
- Device for sealing a drill hole and for discharging drillings or stripped extraction material29US 7,011,167 B2Cigar Lake Mining Corporation · 2006
- Dust cup24US 3,934,661 AThe Black and Decker Manufacturing Company · 1976