F02M 57/025
Hydraulic
Official title: {hydraulic, e.g. with pressure amplification}
F02M57/025 (Hydraulic) appears on 564 US grants and 339 published applications in this corpus.
Search patents in F02M- Granted patents
- 564
- Published applications
- 339
- Assignees
- 108
- Inventors
- 640
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 16 | 0 |
| 1996 | 19 | 0 |
| 1997 | 21 | 0 |
| 1998 | 31 | 0 |
| 1999 | 28 | 0 |
| 2000 | 38 | 0 |
| 2001 | 28 | 7 |
| 2002 | 45 | 32 |
| 2003 | 37 | 43 |
| 2004 | 34 | 53 |
| 2005 | 41 | 31 |
| 2006 | 28 | 35 |
| 2007 | 22 | 15 |
| 2008 | 12 | 15 |
| 2009 | 13 | 16 |
| 2010 | 8 | 14 |
| 2011 | 10 | 9 |
| 2012 | 8 | 7 |
| 2013 | 10 | 9 |
| 2014 | 6 | 7 |
| 2015 | 6 | 6 |
| 2016 | 8 | 8 |
| 2017 | 3 | 3 |
| 2018 | 1 | 6 |
| 2019 | 8 | 4 |
| 2020 | 6 | 11 |
| 2021 | 8 | 3 |
| 2022 | 3 | 0 |
| 2023 | 4 | 4 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dual fuel engine system having fuel-actuated unit pumps and method25 Feb 2025US 12,234,782 B1Caterpillar Inc.
- Liquid ammonia phase-change cooling type hybrid power thermal management system5 Nov 2024US 12,134,980 B2Harbin Engineering University
- Injector apparatus28 Nov 2023US 11,828,256 B2Rklab AG
- Injector apparatus28 Nov 2023US 11,828,257 B2Rklab AG
- Multi-fuel injector and method14 Nov 2023US 11,815,055 B1Caterpillar Inc.
- Hydraulically driven fluid injection system26 Mar 2026US 2026/0085652 A1Hamilton Sundstrand Corporation
- Liquid ammonia phase-change cooling type hybrid power thermal management system25 May 2023US 2023/0160330 A1Harbin Engineering University
- Injector apparatus26 Jan 2023US 2023/0024509 A1Rklab AG
- Injector apparatus12 Jan 2023US 2023/0007936 A1Rklab AG
- Injector apparatus12 Jan 2023US 2023/0012407 A1Rklab AG
Most cited
By later US patents
- Priming reservoir and volume compensation device for hydraulic unit injector fuel system168US 5,245,970 ANavistar International Transportation Corp. · 1993
- Engine having a high pressure hydraulic system and low pressure lubricating system131US 6,067,962 ACaterpillar Inc. · 2000
- Hydraulically-actuated electronically-controlled unit injector fuel system having variable control of actuating fluid pressure125US 5,191,867 ACaterpillar Inc. · 1993
- High speed fuel injector106US 5,460,329 A1995
- Exhaust gas purification device for an internal combustion engine105US 5,732,554 AToyota Jidosha Kabushiki Kaisha · 1998