F04D 29/42
For radial or helico-centrifugal pumps
Official title: for radial or helico-centrifugal pumps
F04D29/42 (For radial or helico-centrifugal pumps) appears on 5,518 US grants and 6,093 published applications in this corpus.
Search patents in F04D- Granted patents
- 5,518
- Published applications
- 6,093
- Assignees
- 1,899
- Inventors
- 10,324
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 37 | 0 |
| 1977 | 24 | 0 |
| 1978 | 22 | 0 |
| 1979 | 17 | 0 |
| 1980 | 19 | 0 |
| 1981 | 25 | 0 |
| 1982 | 14 | 0 |
| 1983 | 27 | 0 |
| 1984 | 20 | 0 |
| 1985 | 20 | 0 |
| 1986 | 19 | 0 |
| 1987 | 27 | 0 |
| 1988 | 41 | 0 |
| 1989 | 44 | 0 |
| 1990 | 35 | 0 |
| 1991 | 40 | 0 |
| 1992 | 54 | 0 |
| 1993 | 44 | 0 |
| 1994 | 57 | 0 |
| 1995 | 37 | 0 |
| 1996 | 44 | 0 |
| 1997 | 34 | 0 |
| 1998 | 44 | 0 |
| 1999 | 44 | 0 |
| 2000 | 63 | 0 |
| 2001 | 58 | 15 |
| 2002 | 54 | 59 |
| 2003 | 80 | 72 |
| 2004 | 60 | 90 |
| 2005 | 56 | 107 |
| 2006 | 52 | 104 |
| 2007 | 60 | 112 |
| 2008 | 51 | 135 |
| 2009 | 50 | 108 |
| 2010 | 60 | 162 |
| 2011 | 89 | 139 |
| 2012 | 124 | 171 |
| 2013 | 110 | 205 |
| 2014 | 124 | 241 |
| 2015 | 155 | 288 |
| 2016 | 155 | 380 |
| 2017 | 280 | 395 |
| 2018 | 246 | 382 |
| 2019 | 390 | 437 |
| 2020 | 392 | 431 |
| 2021 | 353 | 411 |
| 2022 | 392 | 369 |
| 2023 | 368 | 379 |
| 2024 | 390 | 355 |
| 2025 | 333 | 279 |
| 2026 | 184 | 267 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Additively manufactured heat exchanger and diffuser pipe coupled to a compressor stage6 Oct 2026US 12,752,921 B2Hamilton Sundstrand Corporation
- Motorized compressor device with air bearing having reduced axial and radial stack-up6 Oct 2026US 12,753,707 B2Garrett Transportation I Inc.
- Pump diffuser anti-rotation and alignment assembly6 Oct 2026US 12,753,774 B2Pentair Flow Technologies, LLC
- Integrated inflator/deflator air pump, mounting structure and inflatable product6 Oct 2026US 12,753,776 B2Jiangsu Guorun Electric Co., Ltd.
- Fan assembly, heat dissipation assembly and electronic device6 Oct 2026US 12,757,350 B2Giga-Byte Technology Co., Ltd.
- Centrifugal air blower8 Oct 2026US 2026/0309159 A1Shinano Kenshi Co., Ltd.
- Adjustable impeller casing structure for centrifugal compressor8 Oct 2026US 2026/0309163 A1Harbin Engineering University
- Fan motor8 Oct 2026US 2026/0309164 A1LG Electronics Inc.
- Household appliance having an improved fan and motor assembly and fan and motor assembly for same8 Oct 2026US 2026/0309165 A1Omachron Intellectual Property Inc.
- Holder for a fan, fan unit comprising a holder and a fan, and use8 Oct 2026US 2026/0309166 A1ebm-papst Mulfingen GmbH & Co. KGaA & Co. KG
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Systems and methods for routing pressurized fluid305US 8,905,056 B2Halliburton Energy Services.Inc. · 2014
- Autonomous surface cleaning robot for wet and dry cleaning295US 7,761,954 B2iRobot Corporation · 2010
- Medical ventilator268US 6,543,449 B1Respironics, Inc. · 2003
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017