F04B 2027/1809
Controlled pressure
Official title: {Controlled pressure}
F04B2027/1809 (Controlled pressure) appears on 424 US grants and 252 published applications in this corpus.
Search patents in F04B- Granted patents
- 424
- Published applications
- 252
- Assignees
- 61
- Inventors
- 407
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 13 | 0 |
| 1989 | 25 | 0 |
| 1990 | 14 | 0 |
| 1991 | 20 | 0 |
| 1992 | 13 | 0 |
| 1993 | 7 | 0 |
| 1994 | 10 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 15 | 0 |
| 2001 | 25 | 15 |
| 2002 | 38 | 16 |
| 2003 | 22 | 17 |
| 2004 | 15 | 15 |
| 2005 | 6 | 12 |
| 2006 | 6 | 7 |
| 2007 | 3 | 6 |
| 2008 | 3 | 3 |
| 2009 | 3 | 3 |
| 2010 | 3 | 3 |
| 2011 | 1 | 3 |
| 2012 | 3 | 6 |
| 2013 | 2 | 4 |
| 2014 | 3 | 12 |
| 2015 | 5 | 29 |
| 2016 | 12 | 10 |
| 2017 | 20 | 10 |
| 2018 | 7 | 5 |
| 2019 | 3 | 15 |
| 2020 | 14 | 15 |
| 2021 | 7 | 20 |
| 2022 | 20 | 14 |
| 2023 | 10 | 11 |
| 2024 | 15 | 1 |
| 2025 | 7 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Valve26 Aug 2025US 12,398,822 B2Eagle Industry Co., Ltd.
- Fluid control valve13 May 2025US 12,297,913 B2Eagle Industry Co., Ltd.
- Capacity control valve6 May 2025US 12,292,130 B2Eagle Industry Co., Ltd.
- Capacity control valve8 Apr 2025US 12,270,476 B2Eagle Industry Co., Ltd.
- Fluid control valve1 Apr 2025US 12,264,743 B2Eagle Industry Co., Ltd.
- Valve11 Jan 2024US 2024/0011574 A1Eagle Industry Co., Ltd.
- Valve14 Dec 2023US 2023/0400104 A1Eagle Industry Co., Ltd.
- Capacity control valve9 Nov 2023US 2023/0358331 A1Eagle Industry Co., Ltd.
- Valve21 Sep 2023US 2023/0296178 A1Eagle Industry Co., Ltd.
- Capacity control valve21 Sep 2023US 2023/0296187 A1Eagle Industry Co., Ltd.
Most cited
By later US patents
- Variable displacement compressor control valve arrangement87US 4,428,718 AGeneral Motors Corporation · 1984
- Control system for variable displacement compressor85US 4,037,993 ABorg-Warner Corporation · 1977
- Control valve unit with independently operable valve mechanisms for variable displacement compressor77US 6,010,312 AKabushiki Kaisha Toyoda Jidoshokki Seiksakusho · 2000
- Variable capacity compressor68US 4,174,191 ABorg-Warner Corporation · 1979
- Slant plate type compressor with capacity adjusting mechanism and rotating swash plate66US 4,664,604 ASanden Corporation · 1987