F04C 28/14
Using rotating valves
Official title: using rotating valves
F04C28/14 (Using rotating valves) appears on 108 US grants and 36 published applications in this corpus.
Search patents in F04C- Granted patents
- 108
- Published applications
- 36
- Assignees
- 47
- Inventors
- 155
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 7 | 0 |
| 1989 | 23 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 5 |
| 2008 | 2 | 1 |
| 2009 | 2 | 1 |
| 2010 | 1 | 1 |
| 2011 | 3 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 2 |
| 2016 | 0 | 4 |
| 2017 | 0 | 0 |
| 2018 | 2 | 1 |
| 2019 | 0 | 2 |
| 2020 | 2 | 1 |
| 2021 | 0 | 4 |
| 2022 | 1 | 2 |
| 2023 | 2 | 0 |
| 2024 | 2 | 2 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Compact variable volume index valve for screw compressor background11 Feb 2025US 12,221,963 B2Hitachi Global Air Power US, LLC
- Spiral valve for screw capacity control11 Feb 2025US 12,221,964 B2Hitachi Global Air Power US, LLC
- Scroll compressor4 Jun 2024US 12,000,392 B2Copeland Climate Technologies (Suzhou) Co. Ltd.
- Variable compressor housing30 Apr 2024US 11,971,035 B2Tyco Fire & Security GmbH
- Rotary compressors with variable speed and volume control26 Dec 2023US 11,852,145 B2Trane International Inc.
- Compact variable volume index valve for screw compressor background24 Oct 2024US 2024/0352935 A1Hitachi Global Air Power US, LLC
- Spiral valve for screw capacity control24 Oct 2024US 2024/0352936 A1Hitachi Global Air Power US, LLC
- Scroll compressor4 Aug 2022US 2022/0243730 A1Emerson Climate Technologies (Suzhou) Co., Ltd.
- Compressor structure21 Apr 2022US 2022/0120273 A1CH Creative Co., Ltd.
- Variable compressor housing2 Dec 2021US 2021/0372406 A1Johnson Controls Technology Company
Most cited
By later US patents
- Scroll machine with continuous capacity modulation148US 6,412,293 B1Copeland Corporation · 2002
- Scroll type refrigerant compressor133US 5,562,426 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1996
- Scroll machine with asymmetrical bleed hole131US 6,293,767 B1Copeland Corporation · 2001
- Scroll machine with capacity modulation128US 6,176,686 B1Copeland Corporation · 2001
- Scroll machine with capacity modulation89US 5,678,985 ACopeland Corporation · 1997