F04C 28/18
Control of, monitoring of, or safety arrangements for, pumps or pumping installations
Official title: characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F04C28/10)
F04C28/18 (Control of, monitoring of, or safety arrangements for, pumps or pumping installations) appears on 134 US grants and 108 published applications in this corpus.
Search patents in F04C- Granted patents
- 134
- Published applications
- 108
- Assignees
- 63
- Inventors
- 224
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 3 |
| 2002 | 7 | 5 |
| 2003 | 5 | 4 |
| 2004 | 5 | 3 |
| 2005 | 2 | 10 |
| 2006 | 6 | 2 |
| 2007 | 2 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 4 |
| 2010 | 5 | 3 |
| 2011 | 4 | 3 |
| 2012 | 4 | 4 |
| 2013 | 2 | 1 |
| 2014 | 2 | 5 |
| 2015 | 2 | 6 |
| 2016 | 2 | 9 |
| 2017 | 7 | 6 |
| 2018 | 6 | 9 |
| 2019 | 7 | 8 |
| 2020 | 7 | 8 |
| 2021 | 10 | 3 |
| 2022 | 8 | 4 |
| 2023 | 5 | 1 |
| 2024 | 3 | 0 |
| 2025 | 2 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Scroll compressor19 May 2026US 12,631,181 B2Kabushiki Kaisha Toyota Jidoshokki
- Screw compressor30 Dec 2025US 12,510,075 B2Palladio Compressors S.R.L.
- Pump with variable suction/discharge amount and drive device composed of the pump and driving method thereof9 Sep 2025US 12,410,793 B2CH Creative Co., Ltd.
- Fluid machine and operating method thereof12 Nov 2024US 12,140,143 B1Fu Sheng Industrial Co., Ltd.
- Air conditioner and compressor9 Apr 2024US 11,953,008 B2Gree Green Refrigeration Technology Center Co., Ltd. of Zhuhai
- Screw compressor and its slide valve29 Jan 2026US 2026/0028985 A1Carrier Corporation
- Screw Compressor23 Oct 2025US 2025/0327448 A1Palladio Compressors S.R.L.
- Scroll compressor and air conditioning device11 Sep 2025US 2025/0283466 A1Hitachi-Johnson Controls Air Conditioning, Inc.
- Scroll compressor21 Aug 2025US 2025/0264101 A1Kabushiki Kaisha Toyota Jidoshokki
- Pump with variable suction/discharge amount and drive device composed of the pump and driving method thereof4 May 2023US 2023/0136689 A1CH Creative Co., Ltd.
Most cited
By later US patents
- Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor194US 6,047,557 ACopeland Corporation · 2000
- Capacity modulated scroll machine162US 5,613,841 ACopeland Corporation · 1997
- Capacity modulated scroll machine156US 5,741,120 ACopeland Corporation · 1998
- Capacity modulated scroll machine119US 5,611,674 ACopeland Corporation · 1997
- Diagnostic system and method for a cooling system104US 6,679,072 B2Copeland Corporation · 2004