F04C 28/00
Control of, monitoring of, or safety arrangements for, pumps or pumping installations
Official title: Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
F04C28/00 (Control of, monitoring of, or safety arrangements for, pumps or pumping installations) appears on 2,126 US grants and 1,734 published applications in this corpus.
Search patents in F04C- Granted patents
- 2,126
- Published applications
- 1,734
- Assignees
- 563
- Inventors
- 3,351
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 10 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 14 | 0 |
| 1981 | 8 | 0 |
| 1982 | 11 | 0 |
| 1983 | 22 | 0 |
| 1984 | 21 | 0 |
| 1985 | 37 | 0 |
| 1986 | 29 | 0 |
| 1987 | 23 | 0 |
| 1988 | 26 | 0 |
| 1989 | 42 | 0 |
| 1990 | 25 | 0 |
| 1991 | 38 | 0 |
| 1992 | 31 | 0 |
| 1993 | 33 | 0 |
| 1994 | 31 | 0 |
| 1995 | 24 | 0 |
| 1996 | 36 | 0 |
| 1997 | 24 | 0 |
| 1998 | 39 | 0 |
| 1999 | 29 | 0 |
| 2000 | 55 | 0 |
| 2001 | 45 | 12 |
| 2002 | 58 | 51 |
| 2003 | 61 | 65 |
| 2004 | 46 | 67 |
| 2005 | 39 | 76 |
| 2006 | 39 | 70 |
| 2007 | 41 | 38 |
| 2008 | 32 | 60 |
| 2009 | 33 | 59 |
| 2010 | 32 | 66 |
| 2011 | 51 | 61 |
| 2012 | 54 | 48 |
| 2013 | 49 | 60 |
| 2014 | 49 | 73 |
| 2015 | 54 | 78 |
| 2016 | 47 | 81 |
| 2017 | 69 | 101 |
| 2018 | 78 | 97 |
| 2019 | 84 | 76 |
| 2020 | 86 | 91 |
| 2021 | 71 | 92 |
| 2022 | 93 | 79 |
| 2023 | 77 | 74 |
| 2024 | 109 | 55 |
| 2025 | 69 | 58 |
| 2026 | 35 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04C 28/24Control of, monitoring of, or safety arrangements for, pumps or pumping installations662
- F04C 28/28Safety arrangements563
- F04C 28/10Control of, monitoring of, or safety arrangements for, pumps or pumping installations501
- F04C 28/06Control of, monitoring of, or safety arrangements for, pumps or pumping installations460
- F04C 28/08Control of, monitoring of, or safety arrangements for, pumps or pumping installations342
- F04C 28/02Control of, monitoring of, or safety arrangements for, pumps or pumping installations169
- F04C 28/18Control of, monitoring of, or safety arrangements for, pumps or pumping installations134
- F04C 28/04Control of, monitoring of, or safety arrangements for, pumps or pumping installations61
Recent patents
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- Scroll compressor1 Oct 2026US 2026/0298232 A1BITZER Refrigeration Technology (China) Co., Ltd.
- Compressor and method of controlling compressor1 Oct 2026US 2026/0298239 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Reducing power consumption in vacuum pumps1 Oct 2026US 2026/0298240 A1Edwards Limited
- Reversible Fluid Pump with Pressure Relief Mechanism17 Sep 2026US 2026/0275986 A1Illinois Tool Works Inc.
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Most cited
By later US patents
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
- Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor194US 6,047,557 ACopeland Corporation · 2000
- Vibration monitoring system191US 5,602,757 AIngersoll-Rand Company · 1997
- Compressor pulse width modulation172US 6,213,731 B1Copeland Corporation · 2001
- Compressor diagnostic system172US 6,615,594 B2Copeland Corporation · 2003