F04D 27/0246
By varying geometry within the pumps
Official title: {by varying geometry within the pumps, e.g. by adjusting vanes}
F04D27/0246 (By varying geometry within the pumps) appears on 391 US grants and 385 published applications in this corpus.
Search patents in F04D- Granted patents
- 391
- Published applications
- 385
- Assignees
- 155
- Inventors
- 845
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 4 |
| 2003 | 4 | 4 |
| 2004 | 6 | 4 |
| 2005 | 0 | 10 |
| 2006 | 5 | 7 |
| 2007 | 6 | 12 |
| 2008 | 7 | 9 |
| 2009 | 9 | 10 |
| 2010 | 8 | 9 |
| 2011 | 8 | 16 |
| 2012 | 7 | 20 |
| 2013 | 8 | 16 |
| 2014 | 12 | 20 |
| 2015 | 10 | 25 |
| 2016 | 14 | 31 |
| 2017 | 18 | 35 |
| 2018 | 19 | 26 |
| 2019 | 47 | 22 |
| 2020 | 22 | 23 |
| 2021 | 28 | 26 |
| 2022 | 23 | 11 |
| 2023 | 16 | 24 |
| 2024 | 20 | 9 |
| 2025 | 15 | 3 |
| 2026 | 9 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Variable geometry guide vane for a gas turbine engine199US 7,632,064 B2United Technologies Corporation · 2009
- Control system for regulating large capacity rotating machinery131US 4,151,725 ABorg-Warner Corporation · 1979
- System and method for controlling the working line position in a gas turbine engine compressor106US 7,762,084 B2Rolls-Royce Canada, Ltd. · 2010
- Cooling system for a gas turbine engine compressor89US 5,297,386 ASociete Nationale d'Etude et de Construction de Moteurs D'Aviation "S.N.E.C.M A." · 1994
- Control method and apparatus for a centrifugal chiller using a variable speed impeller motor drive77US 5,355,691 AAmerican Standard Inc. · 1994