F04D 29/48
For unidirectional fluid flow in reversible pumps
Official title: for unidirectional fluid flow in reversible pumps {(rotors for reverse action F04D29/2283)}
F04D29/48 (For unidirectional fluid flow in reversible pumps) appears on 66 US grants and 52 published applications in this corpus.
Search patents in F04D- Granted patents
- 66
- Published applications
- 52
- Assignees
- 44
- Inventors
- 126
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 2 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 2 | 2 |
| 2018 | 1 | 4 |
| 2019 | 1 | 3 |
| 2020 | 6 | 6 |
| 2021 | 2 | 8 |
| 2022 | 7 | 3 |
| 2023 | 5 | 4 |
| 2024 | 5 | 2 |
| 2025 | 3 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve pump unit2 Jun 2026US 12,644,458 B2Vitesco Technologies GmbH
- Pump with rotary valve25 Nov 2025US 12,480,502 B2Cooper-Standard Automotive Inc.
- Multiport fluid pump with integrated valve13 May 2025US 12,297,843 B2Cooper-Standard Automotive Inc.
- Flow path conversion pump4 Feb 2025US 12,215,694 B2LG Electronics Inc.
- Centrifugal pump assembly31 Dec 2024US 12,180,968 B2Grundfos Holding A/S
- Multiport fluid pump with integrated valve11 Jun 2026US 2026/0160264 A1Cooper-Standard Automotive Inc.
- Liquid delivery device4 Jun 2026US 2026/0151766 A1Sumitomo Bakelite Co., Ltd.
- Pump with rotary valve8 Jan 2026US 2026/0009388 A1Cooper-Standard Automotive Inc.
- Valve Pump Unit11 Sep 2025US 2025/0283470 A1Vitesco Technologies GmbH
- Pump with rotary valve15 Aug 2024US 2024/0271626 A1Cooper-Standard Automotive Inc.
Most cited
By later US patents
- Dishwasher having a wash liquid recirculation system77US 5,924,432 AWhirlpool Corporation · 1999
- Automatic dishwasher with a pump having a selectively adjustable impeller clearance37US 4,822,241 AWhirlpool Corporation · 1989
- Water pump for window washer unit33US 4,679,983 AFord Motor Company · 1987
- Selectively controlled dual delivery pump, particularly for motor vehicle application27US 4,600,361 AStrada Cantonale · 1986
- Direction-selectable sending-out pump27US 4,728,260 AMaruko Keihouki Kabushiki Kaisha · 1988