F01B 5/00
Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a
Official title: Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a circle centred on main shaft axis
F01B5/00 (Reciprocating-piston machines or engines with cylinder axes arranged substantially tangentially to a) appears on 32 US grants and 22 published applications in this corpus.
Search patents in F01B- Granted patents
- 32
- Published applications
- 22
- Assignees
- 10
- Inventors
- 34
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 4 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Tangential internal combustion engine19 May 2026US 12,631,137 B2Fnf Innovation Sh.P.K.
- Rotational engine with inner and outer rings7 Oct 2025US 12,435,632 B2Duplicent, LLC
- Rotational engine with inner and outer rings24 Sep 2024US 12,098,641 B2Duplicent, LLC
- Rotational engine with inner and outer rings4 Apr 2023US 11,619,133 B2Duplicent, LLC
- Four-stroke rotary- piston engine with adjustable compression ratio and adjustable valve control times1 Mar 2022US 11,261,733 B2
- Tangential internal combustion engine26 Feb 2026US 2026/0055723 A1Fnf Innovation Sh.P.K.
- Rotational engine18 Sep 2025US 2025/0290419 A1Duplicent, LLC
- Rotational engine with inner and outer rings31 Jul 2025US 2025/0243759 A1Duplicent, LLC
- Rotational engine with inner and outer rings2 May 2024US 2024/0141789 A1Duplicent, LLC
- Rotational engine20 Jan 2022US 2022/0018255 A1Duplicent, LLC
Most cited
By later US patents
- Piston machine38US 4,011,842 A1977
- Method and apparatus for deriving mechanical energy from a heat source20US 4,433,551 ACentrifugal Piston Expander, Inc. · 1984
- Centrifugal piston expander17US 4,513,575 ACentrifugal Piston Expander, Inc. · 1985
- Oscillating piston engine15US 4,058,088 A1977
- Rotary internal combustion engine13US 4,106,443 A1978