F04C 28/10
Control of, monitoring of, or safety arrangements for, pumps or pumping installations
Official title: characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
F04C28/10 (Control of, monitoring of, or safety arrangements for, pumps or pumping installations) appears on 501 US grants and 267 published applications in this corpus.
Search patents in F04C- Granted patents
- 501
- Published applications
- 267
- Assignees
- 146
- Inventors
- 787
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 9 | 0 |
| 1985 | 20 | 0 |
| 1986 | 15 | 0 |
| 1987 | 8 | 0 |
| 1988 | 19 | 0 |
| 1989 | 28 | 0 |
| 1990 | 16 | 0 |
| 1991 | 24 | 0 |
| 1992 | 10 | 0 |
| 1993 | 14 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 15 | 0 |
| 2001 | 10 | 1 |
| 2002 | 14 | 5 |
| 2003 | 8 | 6 |
| 2004 | 5 | 11 |
| 2005 | 6 | 6 |
| 2006 | 7 | 18 |
| 2007 | 3 | 8 |
| 2008 | 7 | 10 |
| 2009 | 6 | 14 |
| 2010 | 5 | 14 |
| 2011 | 15 | 9 |
| 2012 | 9 | 9 |
| 2013 | 7 | 8 |
| 2014 | 14 | 11 |
| 2015 | 9 | 9 |
| 2016 | 6 | 16 |
| 2017 | 8 | 13 |
| 2018 | 14 | 16 |
| 2019 | 12 | 15 |
| 2020 | 11 | 8 |
| 2021 | 13 | 17 |
| 2022 | 15 | 13 |
| 2023 | 7 | 7 |
| 2024 | 17 | 10 |
| 2025 | 11 | 6 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Economizer port valve7 Apr 2026US 12,595,943 B2Tyco Fire & Security GmbH
- Screw compressor30 Dec 2025US 12,510,075 B2Palladio Compressors S.R.L.
- Volume ratio control system for a compressor30 Sep 2025US 12,429,052 B2Tyco Fire & Security GmbH
- Slide valve for a twin-screw compressor30 Sep 2025US 12,429,053 B2Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd.
- Two-stage refrigerant compressor and operation method thereof12 Aug 2025US 12,385,487 B2Fu Sheng Industrial Co., Ltd.
- Operation control method for engine driven compressor and engine driven compressor27 Aug 2026US 2026/0251144 A1Airman Corporation
- Discharge Passages For Compressors and Compressors Including Same13 Aug 2026US 2026/0235126 A1
- Screw compressor and its slide valve29 Jan 2026US 2026/0028985 A1Carrier Corporation
- Compressor Having Capacity Modulation System29 Jan 2026US 2026/0028988 A1Copeland Corporation
- Compressor Having Capacity Modulation System29 Jan 2026US 2026/0028989 A1Copeland Corporation
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
- System and method for controlling rotary screw compressors125US 6,450,771 B1Coltec Industries Inc. · 2002