F02B 75/32
Engines characterised by connections between pistons and main shafts and not specific
Official title: Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
F02B75/32 (Engines characterised by connections between pistons and main shafts and not specific) appears on 598 US grants and 489 published applications in this corpus.
Search patents in F02B- Granted patents
- 598
- Published applications
- 489
- Assignees
- 187
- Inventors
- 806
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 13 | 0 |
| 2000 | 8 | 0 |
| 2001 | 15 | 4 |
| 2002 | 8 | 8 |
| 2003 | 10 | 7 |
| 2004 | 6 | 19 |
| 2005 | 9 | 16 |
| 2006 | 14 | 24 |
| 2007 | 19 | 25 |
| 2008 | 19 | 15 |
| 2009 | 11 | 18 |
| 2010 | 10 | 18 |
| 2011 | 9 | 15 |
| 2012 | 17 | 25 |
| 2013 | 11 | 32 |
| 2014 | 29 | 22 |
| 2015 | 17 | 19 |
| 2016 | 12 | 23 |
| 2017 | 20 | 25 |
| 2018 | 22 | 34 |
| 2019 | 48 | 31 |
| 2020 | 22 | 27 |
| 2021 | 32 | 33 |
| 2022 | 23 | 22 |
| 2023 | 14 | 9 |
| 2024 | 10 | 3 |
| 2025 | 8 | 7 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mobile mechanical leverage to generate torque force to a rotary shaft18 Aug 2026US 12,710,075 B2
- Double crankshaft reciprocating engine11 Aug 2026US 12,704,089 B2
- Waissi Engine drivetrain bearing ring interface to piston base bearing pad28 Jul 2026US 12,692,813 B2
- Laminated universal effort machine30 Jun 2026US 12,669,081 B1
- Method and system for minimizing energy consumption and maximizing efficiency in engines and machinery with reciprocating parts30 Jun 2026US 12,669,176 B1
- Reciprocating mechanical devices and methods of operation1 Oct 2026US 2026/0298321 A1
- Internal combustion engine20 Aug 2026US 2026/0243195 A1
- Internal combustion engine20 Aug 2026US 2026/0243196 A1
- Engine13 Aug 2026US 2026/0235053 A1Ishikawa Energy Research Co., Ltd.
- Hypocycloidal mechanism6 Aug 2026US 2026/0226966 A1
Most cited
By later US patents
- Opposed piston internal combustion engine with inviscid layer sealing470US 9,909,492 B2Prime Group Alliance, LLC · 2018
- Reciprocating machine178US 5,762,480 A1998
- Cylinder and piston assemblies for opposed piston engines88US 7,861,679 B2Achates Power, Inc. · 2011
- Internal combustion engine83US 6,279,550 B12001
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005