E02F 9/2246
Control of prime movers
Official title: {Control of prime movers, e.g. depending on the hydraulic load of work tools}
E02F9/2246 (Control of prime movers) appears on 602 US grants and 624 published applications in this corpus.
Search patents in E02F- Granted patents
- 602
- Published applications
- 624
- Assignees
- 120
- Inventors
- 1,111
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 2 |
| 2002 | 2 | 4 |
| 2003 | 4 | 5 |
| 2004 | 4 | 4 |
| 2005 | 3 | 3 |
| 2006 | 8 | 16 |
| 2007 | 3 | 11 |
| 2008 | 7 | 16 |
| 2009 | 16 | 24 |
| 2010 | 12 | 33 |
| 2011 | 15 | 32 |
| 2012 | 18 | 33 |
| 2013 | 34 | 25 |
| 2014 | 39 | 30 |
| 2015 | 30 | 29 |
| 2016 | 28 | 38 |
| 2017 | 44 | 26 |
| 2018 | 15 | 27 |
| 2019 | 27 | 25 |
| 2020 | 27 | 32 |
| 2021 | 33 | 46 |
| 2022 | 36 | 48 |
| 2023 | 31 | 37 |
| 2024 | 44 | 26 |
| 2025 | 33 | 30 |
| 2026 | 19 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hybrid electro-hydraulic load sensing system and control method thereof15 Sep 2026US 12,736,067 B2Chongqing University
- Work machine and load calculation system1 Sep 2026US 12,723,372 B2Sumitomo Construction Machinery Co., Ltd.
- Hydraulic control system and setting method and calibration method of target engine torque during relief in hydraulic control system25 Aug 2026US 12,716,200 B2Caterpillar SARL
- Working machine25 Aug 2026US 12,716,202 B2Kubota Corporation
- Hydraulic arrangement18 Aug 2026US 12,709,870 B2Danfoss Power Solutions GmbH & Co. OHG
- Work Machine8 Oct 2026US 2026/0308880 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic control system for construction machines, and control method thereof8 Oct 2026US 2026/0308881 A1Hd Construction Equiment Co., Ltd.
- Method of monitoring a digging operation8 Oct 2026US 2026/0308882 A1Caterpillar SARL
- Drive system of electrically driven construction machine20 Aug 2026US 2026/0243057 A1Hitachi Construction Machinery Tierra Co., Ltd.
- Method Of Controlling A Powertrain6 Aug 2026US 2026/0226713 A1Caterpillar SARL
Most cited
By later US patents
- Construction machine69US 7,086,226 B2Komatsu Ltd. · 2006
- Control system for load-sensing hydraulic drive circuit65US 4,967,557 AHitachi Construction Machinery Co., Ltd. · 1990
- Proportional valve control apparatus for fluid systems64US 4,712,376 ACaterpillar Inc. · 1987
- Features of main control computer for a power machine60US 6,202,014 B1Clark Equipment Company · 2001
- Method of and system for controlling hydraulic power system55US 4,606,313 AHitachi Construction Machinery Co., Ltd. · 1986