E02F 9/22
Hydraulic or pneumatic drives
Official title: Hydraulic or pneumatic drives {(for dipper or bucket arm position control E02F3/43, for blade position control for graders E02F3/844; for turntables E02F9/121; for fork-lift trucks B66F9/22)}
E02F9/22 (Hydraulic or pneumatic drives) appears on 5,007 US grants and 5,156 published applications in this corpus.
Search patents in E02F- Granted patents
- 5,007
- Published applications
- 5,156
- Assignees
- 739
- Inventors
- 6,348
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 35 | 0 |
| 1977 | 28 | 0 |
| 1978 | 15 | 0 |
| 1979 | 15 | 0 |
| 1980 | 13 | 0 |
| 1981 | 16 | 0 |
| 1982 | 15 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 20 | 0 |
| 1986 | 9 | 0 |
| 1987 | 14 | 0 |
| 1988 | 28 | 0 |
| 1989 | 19 | 0 |
| 1990 | 26 | 0 |
| 1991 | 29 | 0 |
| 1992 | 43 | 0 |
| 1993 | 39 | 0 |
| 1994 | 46 | 0 |
| 1995 | 34 | 0 |
| 1996 | 37 | 0 |
| 1997 | 35 | 0 |
| 1998 | 51 | 0 |
| 1999 | 65 | 0 |
| 2000 | 61 | 0 |
| 2001 | 68 | 9 |
| 2002 | 58 | 51 |
| 2003 | 60 | 77 |
| 2004 | 61 | 76 |
| 2005 | 68 | 72 |
| 2006 | 63 | 104 |
| 2007 | 57 | 104 |
| 2008 | 59 | 101 |
| 2009 | 70 | 130 |
| 2010 | 64 | 150 |
| 2011 | 96 | 138 |
| 2012 | 85 | 159 |
| 2013 | 151 | 255 |
| 2014 | 197 | 275 |
| 2015 | 225 | 281 |
| 2016 | 222 | 283 |
| 2017 | 280 | 263 |
| 2018 | 219 | 251 |
| 2019 | 279 | 231 |
| 2020 | 245 | 316 |
| 2021 | 269 | 365 |
| 2022 | 263 | 397 |
| 2023 | 262 | 284 |
| 2024 | 331 | 319 |
| 2025 | 319 | 253 |
| 2026 | 228 | 212 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E02F 9/2278Hydraulic circuits2,528
- E02F 9/2221Control of flow rate2,200
- E02F 9/2264Arrangements or adaptations of elements for hydraulic drives1,340
- E02F 9/2203Arrangements for controlling the attitude of actuators885
- E02F 9/2217With energy recovery arrangements701
- E02F 9/2246Control of prime movers602
- E02F 9/226Safety arrangements582
- E02F 9/2253Controlling the travelling speed of vehicles539
All 10 subgroupsShow fewer
Recent patents
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- Adaptive eco mode6 Oct 2026US 12,753,573 B2Deere & Company
- Work machine and method for controlling work machine6 Oct 2026US 12,753,574 B2Komatsu Ltd.
- Mobile machine including thumb control system and associated method8 Oct 2026US 2026/0308867 A1Caterpillar Inc.
- Drive system for work machine, control device for work machine, control method for work machine, storage medium storing control program for work machine, and work machine8 Oct 2026US 2026/0308874 A1Nabtesco Corporation
- Work Machine8 Oct 2026US 2026/0308879 A1Hitachi Construction Machinery Co., Ltd.
- 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.
Most cited
By later US patents
- Three-parameter optical fiber sensor and system497US 4,986,671 ALuxtron Corporation · 1991
- Electronic control for a two-axis work implement115US 6,233,511 B1Case Corporation · 2001
- Drive system for construction machinery and method of controlling hydraulic circuit means thereof111US 4,369,625 AHitachi Construction Machinery Co., Ltd. · 1983
- Radial piston pump assemblies and use thereof in hydraulic circuits95US 10,125,750 B2HUSCO International, Inc. · 2018
- Remote radio operating system, and remote operating apparatus, mobile relay station and radio mobile working machine92US 6,778,097 B1Shin Caterpillar Mitsubishi Ltd. · 2004