E02F 3/4075
Dump doors
Official title: {Dump doors; Control thereof}
E02F3/4075 (Dump doors) appears on 105 US grants and 111 published applications in this corpus.
Search patents in E02F- Granted patents
- 105
- Published applications
- 111
- Assignees
- 33
- Inventors
- 151
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 2 | 3 |
| 2011 | 0 | 3 |
| 2012 | 2 | 5 |
| 2013 | 2 | 7 |
| 2014 | 2 | 16 |
| 2015 | 16 | 11 |
| 2016 | 1 | 6 |
| 2017 | 9 | 11 |
| 2018 | 9 | 8 |
| 2019 | 6 | 0 |
| 2020 | 4 | 3 |
| 2021 | 5 | 4 |
| 2022 | 0 | 12 |
| 2023 | 4 | 7 |
| 2024 | 6 | 5 |
| 2025 | 6 | 2 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Damping element for excavator buckets14 Jul 2026US 12,680,265 B2Minetec S.A.
- Snubber apparatus for earth-working bucket16 Jun 2026US 12,655,602 B29257-5810 QuéBec Inc.
- Snubber for excavator bucket door21 Apr 2026US 12,606,980 B2Minetec S.A.
- Multipurpose bucket13 Jan 2026US 12,522,999 B2Great Plains Manufacturing, Inc.
- Wheel or track loader and self-loading aggregate dispenser18 Nov 2025US 12,473,708 B2
- Snubber apparatus for earth-working bucket1 Oct 2026US 2026/0297889 A19257-5810 QuéBec Inc.
- Latch keeper assembly for earth-working bucket6 Aug 2026US 2026/0226698 A19257-5810 QuéBec Inc.
- Modular digging attachment1 Jan 2026US 2026/0002333 A1
- Mining shovel with compositional sensors18 Sep 2025US 2025/0290294 A1MineSense Technologies Ltd.
- Dipper door and dipper door trip assembly4 Sep 2025US 2025/0277350 A1Joy Global Surface Mining Inc
Most cited
By later US patents
- Metal cutting shear and adapter for mounting on a backhoe62US 4,670,983 AAllied Gator, Inc. · 1987
- Power shovel38US 5,469,647 AHarnischfeger Corporation · 1995
- Retarding mechanism for the dipper door of a mining shovel34US 5,815,960 AHarnischfeger Corporation · 1998
- Triple-purpose attachment31US 4,845,867 AWausau Machine and Technology, Inc. · 1989
- Power shovel with dipper door snubber and/or closure assembly30US 6,219,946 B1Harnischfeger Technologies, Inc. · 2001