E02F 3/92
Digging elements
Official title: Digging elements, e.g. suction heads
E02F3/92 (Digging elements) appears on 558 US grants and 393 published applications in this corpus.
Search patents in E02F- Granted patents
- 558
- Published applications
- 393
- Assignees
- 277
- Inventors
- 876
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 17 | 0 |
| 1978 | 15 | 0 |
| 1979 | 11 | 0 |
| 1980 | 10 | 0 |
| 1981 | 13 | 0 |
| 1982 | 24 | 0 |
| 1983 | 24 | 0 |
| 1984 | 11 | 0 |
| 1985 | 7 | 0 |
| 1986 | 9 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 11 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 12 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 0 |
| 2002 | 9 | 10 |
| 2003 | 8 | 14 |
| 2004 | 8 | 10 |
| 2005 | 11 | 10 |
| 2006 | 7 | 12 |
| 2007 | 4 | 6 |
| 2008 | 7 | 15 |
| 2009 | 11 | 13 |
| 2010 | 15 | 11 |
| 2011 | 6 | 18 |
| 2012 | 9 | 10 |
| 2013 | 4 | 17 |
| 2014 | 11 | 26 |
| 2015 | 13 | 16 |
| 2016 | 17 | 16 |
| 2017 | 21 | 15 |
| 2018 | 16 | 21 |
| 2019 | 18 | 21 |
| 2020 | 21 | 28 |
| 2021 | 17 | 19 |
| 2022 | 9 | 10 |
| 2023 | 18 | 23 |
| 2024 | 18 | 25 |
| 2025 | 14 | 15 |
| 2026 | 14 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E02F 3/9243Passive suction heads with no mechanical cutting means183
- E02F 3/9212Mechanical digging means182
- E02F 3/9206Digging devices using blowing effect only, like jets or propellers116
- E02F 3/9256Active suction heads103
- E02F 3/9293Component parts of suction heads59
- E02F 3/9287Vibrating suction heads7
Recent patents
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- Trench cutter17 Sep 2026US 2026/0275680 A1Royal IHC Limited
- Civil engineering machine and method for forming a hole10 Sep 2026US 2026/0266018 A1BAUER Offshore Technologies GmbH
- Machine for removing sediment, dregs, and the like27 Aug 2026US 2026/0249332 A1Gerotto Federico S.R.L.
Most cited
By later US patents
- Enhancing liquid jet erosion147US 4,474,251 AHydronautics, Incorporated · 1984
- Underwater sand pump146US 4,456,424 AToyo Denki Kogyosho Co., Ltd. · 1984
- In-line centrifugal pump115US 4,305,214 A1981
- Enhancing liquid jet erosion91US 4,389,071 AHydronautics, Incorporated · 1983
- Method and apparatus for in situ installation of underground containment barriers under contaminated lands91US 5,542,782 AHalliburton NUS Environmental Corp. · 1996