F04B 49/00
Control
Official title: Control {, e.g. of pump delivery, or pump pressure} of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
F04B49/00 (Control) appears on 7,182 US grants and 6,802 published applications in this corpus.
Search patents in F04B- Granted patents
- 7,182
- Published applications
- 6,802
- Assignees
- 2,818
- Inventors
- 13,019
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 112 | 0 |
| 1977 | 76 | 0 |
| 1978 | 73 | 0 |
| 1979 | 37 | 0 |
| 1980 | 42 | 0 |
| 1981 | 45 | 0 |
| 1982 | 61 | 0 |
| 1983 | 57 | 0 |
| 1984 | 61 | 0 |
| 1985 | 90 | 0 |
| 1986 | 42 | 0 |
| 1987 | 56 | 0 |
| 1988 | 56 | 0 |
| 1989 | 54 | 0 |
| 1990 | 50 | 0 |
| 1991 | 79 | 0 |
| 1992 | 85 | 0 |
| 1993 | 79 | 0 |
| 1994 | 72 | 0 |
| 1995 | 59 | 0 |
| 1996 | 90 | 0 |
| 1997 | 93 | 0 |
| 1998 | 93 | 0 |
| 1999 | 110 | 0 |
| 2000 | 135 | 0 |
| 2001 | 128 | 27 |
| 2002 | 124 | 95 |
| 2003 | 114 | 106 |
| 2004 | 94 | 165 |
| 2005 | 66 | 146 |
| 2006 | 97 | 136 |
| 2007 | 50 | 130 |
| 2008 | 79 | 151 |
| 2009 | 81 | 156 |
| 2010 | 89 | 200 |
| 2011 | 108 | 184 |
| 2012 | 128 | 213 |
| 2013 | 147 | 306 |
| 2014 | 178 | 318 |
| 2015 | 224 | 322 |
| 2016 | 238 | 357 |
| 2017 | 265 | 416 |
| 2018 | 304 | 463 |
| 2019 | 429 | 395 |
| 2020 | 365 | 414 |
| 2021 | 380 | 451 |
| 2022 | 365 | 372 |
| 2023 | 372 | 405 |
| 2024 | 367 | 368 |
| 2025 | 367 | 288 |
| 2026 | 216 | 218 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04B 49/06Control using electricity3,384
- F04B 49/22Control: by means of valves1,483
- F04B 49/02Stopping, starting, unloading or idling control1,377
- F04B 49/08Regulating by delivery pressure841
- F04B 49/20Control: by changing the driving speed809
- F04B 49/10Control: other safety measures804
- F04B 49/12Control: by varying the length of stroke of the working members544
- F04B 49/002Hydraulic systems to change the pump delivery423
All 13 subgroupsShow fewer
- F04B 49/007Installations or systems with two or more pumps or pump cylinders, wherein193
- F04B 49/16Control: by adjusting the capacity of dead spaces of working chambers85
- F04B 49/04Regulating by means of floats81
- F04B 49/18Control: by changing the effective cross-section of the working surface of the21
- F04B 49/005Changing the phase relationship of two working pistons in one working chamber20
Recent patents
- Fluid pump assembly6 Oct 2026US 12,753,748 B2
- Predicting frac pump component life interval6 Oct 2026US 12,753,750 B2Typhon Technology Solutions (U.S.), LLC
- Compressor6 Oct 2026US 12,753,751 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Single-phase field-oriented control for a linear compressor6 Oct 2026US 12,753,752 B1Haier US Appliance Solutions, Inc.
- Electrohydraulic control device and adjustable hydraulic pump system6 Oct 2026US 12,753,781 B2HAWE Hydraulik SE
- Managing regenerative energy of reciprocating pumping unit8 Oct 2026US 2026/0309009 A1Weatherford Technology Holdings, LLC
- Split-architecture high-pressure gas compressor system and method8 Oct 2026US 2026/0309138 A1Arctic Compressor, LLC
- Performance derating control in a circulating pump8 Oct 2026US 2026/0309145 A1Grundfos Holding A/S
- Pump health monitoring system8 Oct 2026US 2026/0309146 A1Pentair Water Pool and Spa, Inc.
- Volumetric variable displacement machine8 Oct 2026US 2026/0309147 A1
Most cited
By later US patents
- Drug pump systems and methods1,088US 5,935,099 ASIMS Deltec, Inc. · 1999
- Apparatus for controlling driving of reciprocating compressor and method thereof1,026US 7,408,310 B2LG Electronics Inc. · 2008
- Pump simulation apparatus1,024US 5,485,408 ASIMS Deltec, Inc. · 1996
- Systems and methods for communicating with ambulatory medical devices such as drug delivery devices851US 5,338,157 APharmacia Deltec, Inc. · 1994
- Systems and methods for operating ambulatory medical devices such as drug delivery devices737US 5,658,250 ASIMS Deltec, Inc. · 1997