F03C 4/00
Oscillating-piston engines
F03C4/00 (Oscillating-piston engines) appears on 12 US grants and 10 published applications in this corpus.
Search patents in F03C- Granted patents
- 12
- Published applications
- 10
- Assignees
- 11
- Inventors
- 23
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 3 |
| 2019 | 2 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Self-cooled rotary engine and pump12 May 2026US 12,624,656 B1
- Bearing arrangement for a mutually turnable unit working under high pressure24 Sep 2019US 10,422,378 B2Hudiksvalls Teknikcentrum AB
- Carbon dioxide-containing gas recovery apparatus25 Jun 2019US 10,328,385 B2Anlet Co., Ltd.
- Rotary vane actuator and vane assembly16 Oct 2018US 10,100,641 B2Kinetrol Limited
- Nutating fluid-mechanical energy converter12 Apr 2016US 9,309,862 B2Halliburton Energy Services.Inc.
- Bearing arrangement for a mutually turnable unit working under high pressure20 Dec 2018US 2018/0363705 A1Hudiksvalls Teknikcentrum AB
- Carbon dioxide-containing gas recovery apparatus5 Jul 2018US 2018/0185783 A1Anlet Co., Ltd.
- Rotary vane actuator and vane assembly17 May 2018US 2018/0135623 A1Kinetrol Limited
- Nutating fluid-mechanical energy converter30 Jul 2015US 2015/0211481 A1Halliburton Energy Services.Inc.
- Fretting-corrosion-prevention oscillating vane type pump actuator20 Sep 2012US 2012/0237384 A1Korea Ocean Research and Development Institute
Most cited
By later US patents
- Rotary actuator with a modified seal structure9US 5,492,051 AFichtel & Sachs AG · 1996
- Oscillating fluid-driven actuator6US 3,995,536 AJohan Tenfjord Mek. Verksted · 1976
- Motor using working fluid distributed into chambers, which are provided for rotating rotors in opposite relative rotation directions3US 7,671,500 B2Honda Motor Co., Ltd. · 2010
- Carbon dioxide-containing gas recovery apparatus1US 10,328,385 B2Anlet Co., Ltd. · 2019
- Rotary vane actuators1US 9,085,978 B2Kinetrol Limited · 2015