F02D 19/0681
Shut-off valves
Official title: {Shut-off valves; Check valves; Safety valves; Pressure relief valves}
F02D19/0681 (Shut-off valves) appears on 58 US grants and 64 published applications in this corpus.
Search patents in F02D- Granted patents
- 58
- Published applications
- 64
- Assignees
- 39
- Inventors
- 112
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 5 |
| 2014 | 2 | 2 |
| 2015 | 3 | 5 |
| 2016 | 4 | 5 |
| 2017 | 2 | 3 |
| 2018 | 3 | 2 |
| 2019 | 4 | 5 |
| 2020 | 4 | 3 |
| 2021 | 3 | 4 |
| 2022 | 5 | 3 |
| 2023 | 5 | 9 |
| 2024 | 8 | 2 |
| 2025 | 8 | 7 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method and devices combining diesel fuel and hydrogen gas to form a homogenized liquid hydro-diesel fuel11 Nov 2025US 12,467,006 B2H2Diesel, Inc.
- Dual fuel system having overflow buffer for hastening fuel switchover15 Jul 2025US 12,359,632 B1Caterpillar Inc.
- Fuel system for engine2 Apr 2026US 2026/0092584 A1American CNG, LLC
- Emergency fuel shutoff battery for gas powered generator30 Oct 2025US 2025/0334093 A1RV Mobile Power, LLC
- Dual fuel system and operating strategy metering fuel via varied fuel pump output9 Oct 2025US 2025/0314211 A1Caterpillar Inc.
- Method and devices combining diesel fuel and hydrogen gas to form a homogenized liquid hydro-diesel fuel7 Aug 2025US 2025/0250498 A1H2Diesel, Inc.
- Systems and methods for at-cylinder fuel switching5 Jun 2025US 2025/0179970 A1Caterpillar Inc.
Most cited
By later US patents
- Dual fuel control and supply system for internal combustion engines55US 4,606,322 A1986
- Method and apparatus for utilizing gaseous and liquid fuels in an internal combustion engine49US 5,816,224 AWelsh Technologies, Inc. · 1998
- Method and apparatus for utilizing gaseous and liquid fuels in an internal combustion device18US 5,411,058 A1995
- Fuel interface modules and related systems and methods14US 8,991,423 B2Go Natural CNG, LLC · 2015
- Fuel control system and method for distributed power generation, conversion, and storage system13US 6,923,168 B2Power-One, Inc. · 2005