F04C 2250/301
Compression chamber profile defined by a mathematical expression or by parameters
Official title: compression chamber profile defined by a mathematical expression or by parameters
F04C2250/301 (Compression chamber profile defined by a mathematical expression or by parameters) appears on 61 US grants and 53 published applications in this corpus.
Search patents in F04C- Granted patents
- 61
- Published applications
- 53
- Assignees
- 38
- Inventors
- 131
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 3 | 5 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 4 |
| 2012 | 1 | 3 |
| 2013 | 6 | 3 |
| 2014 | 1 | 4 |
| 2015 | 1 | 3 |
| 2016 | 1 | 2 |
| 2017 | 6 | 1 |
| 2018 | 4 | 6 |
| 2019 | 2 | 2 |
| 2020 | 4 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 0 | 1 |
| 2024 | 2 | 3 |
| 2025 | 4 | 4 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adding system for fire-extinguishing units26 May 2026US 12,636,532 B2Firedos GmbH
- Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane7 Apr 2026US RE50,855 E1LG Electronics Inc.
- Pump device, respiratory device and method for providing a respiratory gas24 Mar 2026US 12,582,793 B2Weinmann Emergency Medical Technology GmbH + Co. KG
- Single sliding vane rotary displacement pump23 Dec 2025US 12,503,942 B1Ace Machine Design Inc.
- Compressor and air conditioner9 Sep 2025US 12,410,794 B2Gree Electric Appliances, Inc. of Zhuhai
- Adding system for fire-extinguishing units27 Feb 2025US 2025/0065167 A1Firedos GmbH
- Adding system for fire-extinguishing units27 Feb 2025US 2025/0065168 A1Firedos GmbH
- Adding system for fire-extinguishing units27 Feb 2025US 2025/0065169 A1Firedos GmbH
- Compressor and refrigeration device16 Jan 2025US 2025/0020124 A1Daikin Industries, Ltd.
- Compressor and air conditioner19 Dec 2024US 2024/0418170 A1Gree Electric Appliances, Inc. of Zhuhai
Most cited
By later US patents
- Vane type compressor having elliptical stator with doubly-offset rotor52US 4,410,305 AThe Rovac Corporation · 1983
- Rotary internal combustion diesel engine19US 8,539,931 B12013
- Through vane type rotary compressor with specific chamber configuration18US 4,484,873 ANippon Soken, Inc. · 1984
- Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps18US 6,236,897 B12001
- Sliding-vane rotary compressor with specific cylinder bore profile17US 4,616,984 ANippon Soken, Inc. · 1986