F02B 41/00
Engines characterised by special means for improving conversion of heat or pressure
Official title: Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
F02B41/00 (Engines characterised by special means for improving conversion of heat or pressure) appears on 884 US grants and 602 published applications in this corpus.
Search patents in F02B- Granted patents
- 884
- Published applications
- 602
- Assignees
- 255
- Inventors
- 1,102
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 6 | 0 |
| 1978 | 10 | 0 |
| 1979 | 12 | 0 |
| 1980 | 12 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 16 | 0 |
| 1985 | 16 | 0 |
| 1986 | 16 | 0 |
| 1987 | 21 | 0 |
| 1988 | 16 | 0 |
| 1989 | 28 | 0 |
| 1990 | 15 | 0 |
| 1991 | 15 | 0 |
| 1992 | 22 | 0 |
| 1993 | 25 | 0 |
| 1994 | 16 | 0 |
| 1995 | 15 | 0 |
| 1996 | 16 | 0 |
| 1997 | 16 | 0 |
| 1998 | 17 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 18 | 4 |
| 2002 | 11 | 15 |
| 2003 | 23 | 22 |
| 2004 | 16 | 18 |
| 2005 | 13 | 16 |
| 2006 | 20 | 19 |
| 2007 | 10 | 40 |
| 2008 | 24 | 15 |
| 2009 | 14 | 45 |
| 2010 | 15 | 27 |
| 2011 | 24 | 41 |
| 2012 | 22 | 27 |
| 2013 | 15 | 33 |
| 2014 | 36 | 34 |
| 2015 | 22 | 22 |
| 2016 | 22 | 42 |
| 2017 | 25 | 22 |
| 2018 | 33 | 38 |
| 2019 | 27 | 36 |
| 2020 | 40 | 24 |
| 2021 | 26 | 12 |
| 2022 | 21 | 27 |
| 2023 | 23 | 10 |
| 2024 | 10 | 9 |
| 2025 | 7 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Dual piston based gensets for vehicle electrification16 Jun 2026US 12,655,787 B2ePower Mobility LLC
- Opposed-piston internal combustion engine25 Nov 2025US 12,480,439 B2Umu Devising LLC
- Aircraft engine with exhaust having removable deflector23 Sep 2025US 12,420,941 B2Pratt & Whitney Canada Corp.
- Crank gear spring engine26 Aug 2025US 12,398,669 B1
- Aircraft propulsion system with intermittent combustion engine(s)22 Jul 2025US 12,365,469 B2Pratt & Whitney Canada Corp.
- Turbine Control for Improved Dosing9 Apr 2026US 2026/0098493 A1Cummins Emission Solutions Inc.
- Valved-piston and actuator with recycled combustion4 Dec 2025US 2025/0369373 A1
- Opposed-piston internal combustion engine2 Oct 2025US 2025/0305446 A1Umu Devising LLC
- Dual piston based gensets for vehicle electrification20 Mar 2025US 2025/0092819 A1ePower Mobility LLC
- Dual-connection crank-piston mechanism3 Oct 2024US 2024/0328347 A1Sichuan Beixin Hongneng Technology Research Institute
Most cited
By later US patents
- Skip-cycle strategies for four cycle engine202US 5,377,631 AFord Motor Company · 1995
- Hybrid electric vehicle127US 5,881,559 AIsuzu Ceramics Research Institute Co., Ltd. · 1999
- Method of operating an engine assembly114US 10,590,867 B2Pratt & Whitney Canada Corp. · 2020
- Control of fuel flow for power generation based on DC link level106US 11,008,950 B2Dynamo Micropower Corporation · 2021
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989