F01B 1/08
Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders
Official title: with cylinders arranged oppositely relative to main shaft and of "flat" type
F01B1/08 (Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders) appears on 80 US grants and 64 published applications in this corpus.
Search patents in F01B- Granted patents
- 80
- Published applications
- 64
- Assignees
- 40
- Inventors
- 104
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 2 | 0 |
| 2008 | 0 | 3 |
| 2009 | 2 | 3 |
| 2010 | 0 | 3 |
| 2011 | 1 | 0 |
| 2012 | 3 | 4 |
| 2013 | 3 | 1 |
| 2014 | 2 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 3 |
| 2017 | 2 | 2 |
| 2018 | 6 | 2 |
| 2019 | 3 | 6 |
| 2020 | 7 | 6 |
| 2021 | 5 | 7 |
| 2022 | 5 | 9 |
| 2023 | 4 | 2 |
| 2024 | 3 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Opposed piston internal combustion engine with inviscid layer sealing470US 9,909,492 B2Prime Group Alliance, LLC · 2018
- Gas compressor construction and assembly109US 5,326,231 ABristol Compressors, Inc. · 1994
- Master and slave pullrods70US 9,593,710 B2EcoMotors, Inc. · 2017
- Cyclic dwell engine32US 4,589,380 AAvalon Research · 1986
- Balanced reciprocating machines32US 4,966,042 A1990