F02B 75/04
Engines with variable distances between pistons at top dead-centre positions and cylinder
Official title: Engines with variable distances between pistons at top dead-centre positions and cylinder heads
F02B75/04 (Engines with variable distances between pistons at top dead-centre positions and cylinder) appears on 1,049 US grants and 854 published applications in this corpus.
Search patents in F02B- Granted patents
- 1,049
- Published applications
- 854
- Assignees
- 218
- Inventors
- 1,218
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 10 | 0 |
| 1979 | 11 | 0 |
| 1980 | 9 | 0 |
| 1981 | 5 | 0 |
| 1982 | 9 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 16 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 10 | 0 |
| 1989 | 20 | 0 |
| 1990 | 12 | 0 |
| 1991 | 8 | 0 |
| 1992 | 11 | 0 |
| 1993 | 14 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 8 | 0 |
| 1998 | 8 | 0 |
| 1999 | 13 | 0 |
| 2000 | 9 | 0 |
| 2001 | 16 | 3 |
| 2002 | 25 | 22 |
| 2003 | 30 | 27 |
| 2004 | 34 | 36 |
| 2005 | 16 | 27 |
| 2006 | 26 | 22 |
| 2007 | 27 | 26 |
| 2008 | 27 | 25 |
| 2009 | 19 | 43 |
| 2010 | 16 | 39 |
| 2011 | 18 | 22 |
| 2012 | 30 | 38 |
| 2013 | 17 | 30 |
| 2014 | 47 | 40 |
| 2015 | 27 | 51 |
| 2016 | 45 | 52 |
| 2017 | 39 | 68 |
| 2018 | 66 | 83 |
| 2019 | 80 | 65 |
| 2020 | 75 | 56 |
| 2021 | 58 | 38 |
| 2022 | 40 | 15 |
| 2023 | 12 | 9 |
| 2024 | 10 | 9 |
| 2025 | 4 | 4 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Piston system for a compression engine8 Sep 2026US 12,729,642 B2
- Dual piston based gensets for vehicle electrification16 Jun 2026US 12,655,787 B2ePower Mobility LLC
- Piston assembly and associated components, systems, and method19 May 2026US 12,631,252 B2Transcend Energy Group, LLC
- Internal combustion engine12 May 2026US 12,624,669 B2Innio Jenbacher GmbH & Co OG
- Work vehicle power system with dynamic auto-ignition assistance compression ratios17 Feb 2026US 12,553,395 B2Deere & Company
- Volumetric heat engine with piston-pendulum30 Jul 2026US 2026/0218647 A1
- Enhanced efficiency internal combustion engine21 May 2026US 2026/0139619 A1
- Continuously Variable Displacement and Variable Compression Ratio Mechanism and an Engine Provided with the Same16 Apr 2026US 2026/0104005 A1Hyundai Motor Company
- Piston System For a Compression Engine8 Jan 2026US 2026/0009350 A1
- Variable compression ratio engine25 Dec 2025US 2025/0389221 A1
Most cited
By later US patents
- External combustion slidable vane motor with air cushions149US 4,672,813 A1987
- Free-piston engine103US 6,199,519 B1Sandia Corporation · 2001
- Two stroke cycle engine80US 4,876,991 A1989
- Internal combustion powered tool for driving fastening elements79US 5,213,247 AHilti Aktiengesellschaft · 1993
- Free piston internal combustion engine74US 5,775,273 ASunPower Corporation · 1998