F04D 19/00
Axial-flow pumps
Official title: Axial-flow pumps (F04D21/00 takes precedence; {pump comprising axial flow and radial flow stages F04D17/025})
F04D19/00 (Axial-flow pumps) appears on 3,264 US grants and 3,944 published applications in this corpus.
Search patents in F04D- Granted patents
- 3,264
- Published applications
- 3,944
- Assignees
- 1,121
- Inventors
- 6,146
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 9 | 0 |
| 1988 | 13 | 0 |
| 1989 | 14 | 0 |
| 1990 | 11 | 0 |
| 1991 | 13 | 0 |
| 1992 | 16 | 0 |
| 1993 | 13 | 0 |
| 1994 | 16 | 0 |
| 1995 | 17 | 0 |
| 1996 | 26 | 0 |
| 1997 | 18 | 0 |
| 1998 | 20 | 0 |
| 1999 | 22 | 0 |
| 2000 | 24 | 0 |
| 2001 | 35 | 12 |
| 2002 | 46 | 39 |
| 2003 | 48 | 61 |
| 2004 | 40 | 37 |
| 2005 | 31 | 58 |
| 2006 | 40 | 55 |
| 2007 | 22 | 69 |
| 2008 | 29 | 81 |
| 2009 | 23 | 67 |
| 2010 | 42 | 65 |
| 2011 | 47 | 68 |
| 2012 | 57 | 70 |
| 2013 | 46 | 136 |
| 2014 | 73 | 163 |
| 2015 | 84 | 287 |
| 2016 | 98 | 242 |
| 2017 | 172 | 262 |
| 2018 | 214 | 272 |
| 2019 | 251 | 238 |
| 2020 | 254 | 252 |
| 2021 | 211 | 223 |
| 2022 | 275 | 268 |
| 2023 | 233 | 248 |
| 2024 | 267 | 239 |
| 2025 | 227 | 224 |
| 2026 | 117 | 208 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aircraft with an unducted fan propulsor6 Oct 2026US 12,752,923 B2General Electric Company
- Fan6 Oct 2026US 12,753,768 B2Levitronix LLC
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- Mounting device for a fan unit6 Oct 2026US 12,753,777 B2Spectronik Pte. Ltd.
- Handheld camera fan6 Oct 2026US 12,753,778 B1Shenzhen Xinyifang International Trade Co., Ltd.
- Flow deflector having channels with double ejection angles1 Oct 2026US 2026/0298265 A1Safran Aircraft Engines
- Axial fan comprising endplates at the tip of the blades24 Sep 2026US 2026/0286965 A1R.E.M. Patents S.R.L.
- Vacuum pump and stator disc24 Sep 2026US 2026/0286966 A1Edwards Japan Limited
- A vacuum pump and a permanent magnetic bearing assembly for a vacuum pump24 Sep 2026US 2026/0286969 A1
- Fan assembly24 Sep 2026US 2026/0286976 A1Milwaukee Electric Tool Corporation
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Fan with collapsible blades, redundant fan system, and related method271US 6,860,713 B2Nidec Corporation · 2005
- Counter rotating aircraft gas turbine engine with high overall pressure ratio compressor248US 6,732,502 B2General Electric Company · 2004
- Apparatus and method for regulating a pressure in a chamber203US 5,944,049 AAPPLIED Materials.Inc. · 1999