F04D 15/0022
Throttling valves or valves varying the pump inlet opening or the outlet
Official title: {throttling valves or valves varying the pump inlet opening or the outlet opening}
F04D15/0022 (Throttling valves or valves varying the pump inlet opening or the outlet) appears on 126 US grants and 125 published applications in this corpus.
Search patents in F04D- Granted patents
- 126
- Published applications
- 125
- Assignees
- 104
- Inventors
- 270
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 6 |
| 2004 | 2 | 2 |
| 2005 | 0 | 2 |
| 2006 | 4 | 1 |
| 2007 | 0 | 5 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 2 | 2 |
| 2011 | 2 | 4 |
| 2012 | 1 | 4 |
| 2013 | 3 | 5 |
| 2014 | 2 | 3 |
| 2015 | 6 | 8 |
| 2016 | 2 | 9 |
| 2017 | 4 | 6 |
| 2018 | 5 | 8 |
| 2019 | 9 | 10 |
| 2020 | 11 | 17 |
| 2021 | 7 | 10 |
| 2022 | 10 | 6 |
| 2023 | 9 | 3 |
| 2024 | 5 | 5 |
| 2025 | 3 | 5 |
| 2026 | 6 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Cardiac assist device256US 5,941,813 ACardiotools Herzchirurgietechnik Gmbh · 1999
- Method for optimizing valve position and pump speed in a PID control valve system without the use of external signals55US 7,925,385 B2ITT Manufacturing Enterprises, Inc. · 2011
- Zoning circulator controller41US 5,466,995 ATaco, Inc. · 1995
- Apparatus and a method for determining the viscosity of a fluid35US 6,640,617 B2Levitronix LLC · 2003
- Controlling multiple pumps operating in parallel or series35US 7,010,393 B2Compressor Controls Corporation · 2006