F02M 37/0052
Details on the fuel return circuit
Official title: {Details on the fuel return circuit; Arrangement of pressure regulators}
F02M37/0052 (Details on the fuel return circuit) appears on 568 US grants and 476 published applications in this corpus.
Search patents in F02M- Granted patents
- 568
- Published applications
- 476
- Assignees
- 264
- Inventors
- 1,264
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 10 | 0 |
| 1994 | 10 | 0 |
| 1995 | 9 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 15 | 0 |
| 1999 | 14 | 0 |
| 2000 | 6 | 0 |
| 2001 | 15 | 7 |
| 2002 | 21 | 23 |
| 2003 | 19 | 16 |
| 2004 | 15 | 17 |
| 2005 | 16 | 19 |
| 2006 | 13 | 8 |
| 2007 | 16 | 24 |
| 2008 | 16 | 19 |
| 2009 | 11 | 34 |
| 2010 | 23 | 20 |
| 2011 | 12 | 21 |
| 2012 | 21 | 22 |
| 2013 | 11 | 14 |
| 2014 | 15 | 20 |
| 2015 | 19 | 19 |
| 2016 | 13 | 30 |
| 2017 | 16 | 29 |
| 2018 | 24 | 24 |
| 2019 | 36 | 25 |
| 2020 | 18 | 23 |
| 2021 | 20 | 17 |
| 2022 | 14 | 11 |
| 2023 | 11 | 9 |
| 2024 | 11 | 9 |
| 2025 | 10 | 8 |
| 2026 | 0 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for direct injection of a gaseous fuel30 Dec 2025US 12,510,042 B2Liebherr-Components Deggendorf GmbH
- Biodiesel conversion kit for an FDL engine30 Dec 2025US 12,510,045 B2Transportation IP Holdings, LLC
- Intake manifold with integrated fuel return passage16 Dec 2025US 12,497,937 B2Cummins Inc.
- Device for supplying liquid at constant amount and method for controlling same9 Dec 2025US 12,493,305 B2Ningbo Richen Electrical Appliance Co., Ltd
- Engine device including an orientation of a fuel return line attached to a common rail4 Nov 2025US 12,460,613 B2Yanmar Power Technology Co., Ltd.
- High Pressure Fuel Pump With Configuration To Mitigate Cavitation9 Jul 2026US 2026/0194033 A1
- Pressure regulator valve for engine fuel system25 Jun 2026US 2026/0177024 A1Cummins Inc.
- Method and assemblies for repair of plastic fuel lock ring and fuel supply line4 Jun 2026US 2026/0153069 A1
- Fuel tank assembly21 May 2026US 2026/0138441 A1Textron Ground Support Equipment Inc.
- Device for direct injection of a gaseous fuel19 Mar 2026US 2026/0078721 A1Liebherr-Components Deggendorf GmbH
Most cited
By later US patents
- Snap-on fluidtight pipe connecting device134US 5,219,185 AITW Fastex Italia S.p.A. · 1993
- Fuel blending system method and apparatus134US 5,469,830 ACessna Aircraft Company · 1995
- Fuel transfer pump and control112US 6,792,966 B2Federal-Mogul World Wide, Inc. · 2004
- Pressure-responsive fuel delivery system77US 4,926,829 AWalbro Corporation · 1990
- Fuel transfer pump and control77US 6,382,225 B1Federal-Mogul World Wide, Inc. · 2002