F04D 15/0066
Control: by changing the speed
Official title: {by changing the speed, e.g. of the driving engine}
F04D15/0066 (Control: by changing the speed) appears on 723 US grants and 839 published applications in this corpus.
Search patents in F04D- Granted patents
- 723
- Published applications
- 839
- Assignees
- 376
- Inventors
- 1,427
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 12 | 0 |
| 2000 | 7 | 0 |
| 2001 | 9 | 4 |
| 2002 | 10 | 10 |
| 2003 | 11 | 6 |
| 2004 | 9 | 12 |
| 2005 | 3 | 19 |
| 2006 | 12 | 16 |
| 2007 | 9 | 18 |
| 2008 | 4 | 26 |
| 2009 | 11 | 22 |
| 2010 | 16 | 24 |
| 2011 | 14 | 23 |
| 2012 | 18 | 18 |
| 2013 | 20 | 37 |
| 2014 | 21 | 49 |
| 2015 | 18 | 55 |
| 2016 | 25 | 46 |
| 2017 | 34 | 69 |
| 2018 | 41 | 42 |
| 2019 | 61 | 43 |
| 2020 | 55 | 54 |
| 2021 | 54 | 82 |
| 2022 | 44 | 35 |
| 2023 | 45 | 42 |
| 2024 | 45 | 33 |
| 2025 | 40 | 28 |
| 2026 | 23 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method and arrangement for operating pump system14 Jul 2026US 12,683,531 B2ABB Schweiz AG
- Variable speed pumping system and method8 Oct 2026US 2026/0309157 A1Pentair Water Pool and Spa, Inc.
- Twin Pump Unit Casing Having Motor Mounted Touchscreens1 Oct 2026US 2026/0298247 A1S. A. Armstrong Limited
- Fluid delivery system health monitoring systems and methods1 Oct 2026US 2026/0298249 A1Oshkosh Corporation
- Variable speed pumping system and method1 Oct 2026US 2026/0298251 A1Pentair Water Pool and Spa, Inc.
- Method for identifying and removing a blockage of a centrifugal pump10 Sep 2026US 2026/0266295 A1Wilo SE
Most cited
By later US patents
- Medicinal fluid pump having multiple stored protocols727US 5,685,844 AAbbott Laboratories · 1997
- Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores267US 6,167,965 ABaker Hughes Incorporated · 2001
- Magnetically suspended and rotated rotor203US 5,385,581 ALife Extenders Corporation · 1995
- Methods and apparatus for controlling a continuous flow rotary blood pump203US 6,817,836 B2Baylor College of Medicine · 2004
- Pre-programmed electronic programmable thermostat198US 5,329,991 AHunter Fan Company · 1994