F04D
Non-positive-displacement pumps
Official title: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
F04D (Non-positive-displacement pumps) appears on 32,536 US grants and 33,139 published applications in this corpus.
Search patents in F04D- Granted patents
- 32,536
- Published applications
- 33,139
- Assignees
- 7,280
- Inventors
- 48,519
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 246 | 0 |
| 1977 | 188 | 0 |
| 1978 | 177 | 0 |
| 1979 | 148 | 0 |
| 1980 | 187 | 0 |
| 1981 | 167 | 0 |
| 1982 | 135 | 0 |
| 1983 | 158 | 0 |
| 1984 | 147 | 0 |
| 1985 | 169 | 0 |
| 1986 | 155 | 0 |
| 1987 | 229 | 0 |
| 1988 | 238 | 0 |
| 1989 | 311 | 0 |
| 1990 | 276 | 0 |
| 1991 | 267 | 0 |
| 1992 | 314 | 0 |
| 1993 | 338 | 0 |
| 1994 | 341 | 0 |
| 1995 | 315 | 0 |
| 1996 | 337 | 0 |
| 1997 | 306 | 0 |
| 1998 | 340 | 0 |
| 1999 | 379 | 0 |
| 2000 | 549 | 0 |
| 2001 | 606 | 131 |
| 2002 | 631 | 510 |
| 2003 | 599 | 659 |
| 2004 | 509 | 753 |
| 2005 | 424 | 929 |
| 2006 | 541 | 847 |
| 2007 | 456 | 934 |
| 2008 | 441 | 1013 |
| 2009 | 455 | 1008 |
| 2010 | 572 | 1052 |
| 2011 | 588 | 986 |
| 2012 | 884 | 1122 |
| 2013 | 778 | 1462 |
| 2014 | 879 | 1547 |
| 2015 | 958 | 1716 |
| 2016 | 1023 | 1948 |
| 2017 | 1399 | 2042 |
| 2018 | 1519 | 2056 |
| 2019 | 2105 | 1906 |
| 2020 | 2046 | 1887 |
| 2021 | 1629 | 1697 |
| 2022 | 1711 | 1534 |
| 2023 | 1522 | 1509 |
| 2024 | 1578 | 1440 |
| 2025 | 1438 | 1344 |
| 2026 | 828 | 1107 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F04D 29/00Details, component parts, or accessories24,490
- F04D 25/00Pumping installations or systems8,424
- F04D 13/00Pumping installations or systems4,854
- F04D 27/00Control4,333
- F04D 17/00Radial-flow pumps3,579
- F04D 19/00Axial-flow pumps3,264
- F04D 15/00Control2,304
- F04D 1/00Radial-flow pumps1,358
All 18 main groupsShow fewer
- F04D 7/00Pumps adapted for handling specific fluids1,222
- F04D 3/00Axial-flow pumps605
- F04D 5/00Pumps with circumferential or transverse flow604
- F04D 9/00Priming504
- F04D 23/00Non-positive-displacement pumps: other rotary non-positive-displacement pumps389
- F04D 31/00Pumping liquids and elastic fluids at the same time262
- F04D 33/00Non-positive-displacement pumps with other than pure rotation228
- F04D 21/00Pump involving supersonic speed of pumped fluids94
- F04D 35/00Pumps producing waves in liquids, i.e. wave-producers37
- F04D 11/00Non-positive-displacement pumps: other rotary non-positive-displacement pumps36
Recent patents
- CPAP device6 Oct 2026US 12,752,066 B2Murata Manufacturing Co., Ltd.
- Additively manufactured heat exchanger and diffuser pipe coupled to a compressor stage6 Oct 2026US 12,752,921 B2Hamilton Sundstrand Corporation
- Aircraft with an unducted fan propulsor6 Oct 2026US 12,752,923 B2General Electric Company
- Bearing for turbomachine variable pitch stator vane pivot, stator vane comprising such a bearing and turbomachine comprising such stator vanes6 Oct 2026US 12,753,705 B2Safran Aircraft Engines
- Motorized compressor device with air bearing having reduced axial and radial stack-up6 Oct 2026US 12,753,707 B2Garrett Transportation I Inc.
- Vacuum cleaner with two turbines, and operating method for same8 Oct 2026US 2026/0305892 A1Hilti Aktiengesellschaft
- Evaporator for ambient water bodies, and related system and method8 Oct 2026US 2026/0306964 A1Resource West, Inc.
- Performance of airfoils and hydrofoils8 Oct 2026US 2026/0307777 A1SJK Energy Solutions, LLC
- Portable cooling platform for unmanned autonomous aerial vehicle landing and takeoff, and alignment method thereof8 Oct 2026US 2026/0307831 A1Electronics and Telecommunications Research Institute
- Gas separator for electrical submersible pump8 Oct 2026US 2026/0309018 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Air flow-producing device, such as a vacuum cleaner or a blower1,158US 7,712,182 B2Milwaukee Electric Tool Corporation · 2010
- Electronic device806US 9,313,915 B2ASUSTek · 2016
- Medicinal fluid pump having multiple stored protocols727US 5,685,844 AAbbott Laboratories · 1997
- Drug pump systems and methods658US 6,241,704 B1SIMS Deltec, Inc. · 2001
- Surgical irrigation apparatus and methods for use502US 6,162,194 AApollo Camera, LLC · 2000