E02F 9/04
Walking gears moving the dredger forward step-by-step
E02F9/04 (Walking gears moving the dredger forward step-by-step) appears on 24 US grants and 7 published applications in this corpus.
Search patents in E02F- Granted patents
- 24
- Published applications
- 7
- Assignees
- 15
- Inventors
- 65
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Walking system with replaceable wear surfaces7 Jan 2025US 12,188,202 B2Caterpillar Global Mining LLC
- Automatic walking for a load transporting apparatus12 Jan 2021US 10,889,961 B2Entro Industries, Inc.
- Eccentric assembly for walking mechanism22 May 2018US 9,976,281 B2Caterpillar Global Mining LLC
- Fabricated eccentric for drag line excavator walking mechanisms12 May 2015US 9,027,438 B1Warfab Industries, Inc.
- Drive assembly, carriage and conveyor and method17 Mar 2015US 8,978,793 B2Yeti Developments B.V.
- Walking system with replaceable wear surfaces23 Feb 2023US 2023/0053466 A1Caterpillar Global Mining LLC
- Automatic walking for a load transporting apparatus14 Feb 2019US 2019/0048558 A1Entro Industries, Inc.
- Eccentric assembly for walking mechanism24 Aug 2017US 2017/0241103 A1Caterpillar Global Mining LLC
- Multifunctional all-terrain walking hydraulic excavator3 Nov 2016US 2016/0319513 A1Xcmg Construction Machinery Co., Ltd. Road Machinery Branch
- Drive Assembly, Carriage and Conveyor and Method23 Jan 2014US 2014/0021019 A1Yeti Developments B.V.
Most cited
By later US patents
- Stepping vehicle94US 4,790,400 A1988
- Cross-country vehicle with stepwise locomotion80US 5,137,101 A1992
- Rolling and stepping vehicle43US 4,265,326 A1981
- Walking drag line26US 4,252,204 AVarian Associates, Inc. · 1981
- Excavator having lifting legs and cooperating boom mounted bucket for "walking"20US 4,049,070 A1977