F04D 29/22
Specially for centrifugal pumps
Official title: specially for centrifugal pumps
F04D29/22 (Specially for centrifugal pumps) appears on 1,628 US grants and 1,537 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,628
- Published applications
- 1,537
- Assignees
- 796
- Inventors
- 2,898
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 12 | 0 |
| 1978 | 9 | 0 |
| 1979 | 9 | 0 |
| 1980 | 6 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 11 | 0 |
| 1984 | 10 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 21 | 0 |
| 1988 | 15 | 0 |
| 1989 | 24 | 0 |
| 1990 | 15 | 0 |
| 1991 | 14 | 0 |
| 1992 | 19 | 0 |
| 1993 | 20 | 0 |
| 1994 | 14 | 0 |
| 1995 | 15 | 0 |
| 1996 | 23 | 0 |
| 1997 | 17 | 0 |
| 1998 | 23 | 0 |
| 1999 | 19 | 0 |
| 2000 | 27 | 0 |
| 2001 | 23 | 9 |
| 2002 | 30 | 13 |
| 2003 | 23 | 19 |
| 2004 | 22 | 27 |
| 2005 | 15 | 27 |
| 2006 | 13 | 22 |
| 2007 | 14 | 21 |
| 2008 | 25 | 34 |
| 2009 | 9 | 32 |
| 2010 | 17 | 39 |
| 2011 | 18 | 36 |
| 2012 | 31 | 39 |
| 2013 | 36 | 61 |
| 2014 | 29 | 47 |
| 2015 | 43 | 86 |
| 2016 | 45 | 116 |
| 2017 | 73 | 157 |
| 2018 | 75 | 92 |
| 2019 | 123 | 128 |
| 2020 | 109 | 82 |
| 2021 | 97 | 100 |
| 2022 | 92 | 76 |
| 2023 | 89 | 70 |
| 2024 | 78 | 80 |
| 2025 | 78 | 79 |
| 2026 | 44 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid hydrogen pump impellor assembly6 Oct 2026US 12,753,770 B2ROLLS-ROYCE plc
- Multistage disc pump for multiphase fluids6 Oct 2026US 12,753,771 B2
- Multiple blade rows for impeller and diffuser stages15 Sep 2026US 12,736,061 B2
- Sealed micropump8 Sep 2026US 12,728,255 B2Kardion GmbH
- High viscosity pump and rotor for pumping liquids, materials and slurries1 Sep 2026US 12,723,589 B2Eddy Pump Corporation
- Pump Assembly1 Oct 2026US 2026/0298263 A1KSB SE & Co. KGaA
- Impeller pump and method24 Sep 2026US 2026/0286970 A1Pentair Flow Technologies, LLC
- Water pump and humidifier17 Sep 2026US 2026/0275997 A1Suzhou BeiAng Smart Technology Co., Ltd.
- High-speed pressurized impeller disk27 Aug 2026US 2026/0251150 A1P3 Technologies, LLC
- High-speed pressurized impeller disk27 Aug 2026US 2026/0251151 A1P3 Technologies, LLC
Most cited
By later US patents
- Self-deploying axial-flow pump introduced intravascularly for temporary cardiac support480US 6,533,716 B12003
- Heart assist device with expandable impeller pump411US 7,841,976 B2The Penn State Research Foundation · 2010
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Magnetically suspended and rotated impellor pump apparatus and method291US 4,688,998 A1987