F04B 2027/1813
Crankcase pressure
Official title: {Crankcase pressure}
F04B2027/1813 (Crankcase pressure) appears on 397 US grants and 233 published applications in this corpus.
Search patents in F04B- Granted patents
- 397
- Published applications
- 233
- Assignees
- 60
- Inventors
- 388
- 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 | 6 | 0 |
| 1988 | 13 | 0 |
| 1989 | 23 | 0 |
| 1990 | 13 | 0 |
| 1991 | 19 | 0 |
| 1992 | 13 | 0 |
| 1993 | 7 | 0 |
| 1994 | 10 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 24 | 15 |
| 2002 | 35 | 16 |
| 2003 | 21 | 17 |
| 2004 | 15 | 15 |
| 2005 | 6 | 12 |
| 2006 | 6 | 7 |
| 2007 | 3 | 6 |
| 2008 | 3 | 3 |
| 2009 | 3 | 3 |
| 2010 | 3 | 1 |
| 2011 | 1 | 2 |
| 2012 | 3 | 5 |
| 2013 | 1 | 3 |
| 2014 | 2 | 12 |
| 2015 | 4 | 27 |
| 2016 | 11 | 9 |
| 2017 | 20 | 9 |
| 2018 | 5 | 4 |
| 2019 | 3 | 9 |
| 2020 | 9 | 15 |
| 2021 | 6 | 18 |
| 2022 | 19 | 13 |
| 2023 | 10 | 11 |
| 2024 | 14 | 1 |
| 2025 | 7 | 0 |
By publication year. Applications have been published since 2001.
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