E02F 3/9256
Active suction heads
Official title: {Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head (E02F5/108 takes precedence)}
E02F3/9256 (Active suction heads) appears on 103 US grants and 104 published applications in this corpus.
Search patents in E02F- Granted patents
- 103
- Published applications
- 104
- Assignees
- 65
- Inventors
- 189
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 3 |
| 2004 | 1 | 0 |
| 2005 | 2 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 3 |
| 2008 | 4 | 2 |
| 2009 | 1 | 4 |
| 2010 | 4 | 5 |
| 2011 | 2 | 4 |
| 2012 | 3 | 1 |
| 2013 | 0 | 6 |
| 2014 | 0 | 7 |
| 2015 | 6 | 3 |
| 2016 | 5 | 4 |
| 2017 | 3 | 3 |
| 2018 | 4 | 8 |
| 2019 | 7 | 5 |
| 2020 | 4 | 8 |
| 2021 | 5 | 4 |
| 2022 | 4 | 4 |
| 2023 | 5 | 7 |
| 2024 | 4 | 5 |
| 2025 | 4 | 9 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydrovac with safe state25 Aug 2026US 12,716,204 B2Brandt Industries Canada Ltd.
- Hydrovac with auto shutoff based on weight18 Aug 2026US 12,709,864 B2Brandt Industries Canada Ltd.
- Additive dosing assemblies and hydro excavation vacuum apparatus incorporating same28 Jul 2026US 12,692,684 B2Vermeer Manufacturing Company
- Apparatus for removing material from a floor of a body of water10 Mar 2026US 12,571,181 B2Soil Machine Dynamics Limited
- Non-conductive hydro-excavation wands incorporating wear sleeves23 Sep 2025US 12,421,689 B2MGE Underground, Inc.
- Dredge with Drive Augers and Method of Dredging1 Oct 2026US 2026/0297892 A1
- System and method of operating a hydrovac to adjust suction18 Sep 2025US 2025/0290272 A1
- Hydrovac with real-time weight monitoring18 Sep 2025US 2025/0290273 A1
- Hydrovac with auto shutoff based on weight18 Sep 2025US 2025/0290274 A1Brandt Industries Canada Ltd.
- Water tank for a hydrovac18 Sep 2025US 2025/0290275 A1
Most cited
By later US patents
- Soft excavator49US 5,212,891 AThe Charles Machine Works, Inc. · 1993
- Vacuum boring and mud recovery system48US 6,988,568 B22006
- Mobile vacuum boring and excavation method38US 7,644,523 B22010
- Method and casing for excavating a borehole36US 5,361,855 AThe Charles Machines Works, Inc. · 1994
- Method and apparatus for removing sediment or other flowable solid material from a bed underlying a body of water27US 4,312,762 A1982