F04D 29/50
For reversing fluid flow
Official title: for reversing fluid flow {(rotors for reverse action F04D29/2283)}
F04D29/50 (For reversing fluid flow) appears on 98 US grants and 115 published applications in this corpus.
Search patents in F04D- Granted patents
- 98
- Published applications
- 115
- Assignees
- 46
- Inventors
- 110
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 0 | 3 |
| 2004 | 4 | 7 |
| 2005 | 2 | 3 |
| 2006 | 6 | 9 |
| 2007 | 4 | 2 |
| 2008 | 3 | 3 |
| 2009 | 2 | 0 |
| 2010 | 0 | 5 |
| 2011 | 3 | 6 |
| 2012 | 3 | 1 |
| 2013 | 0 | 1 |
| 2014 | 4 | 1 |
| 2015 | 4 | 4 |
| 2016 | 2 | 3 |
| 2017 | 1 | 3 |
| 2018 | 2 | 3 |
| 2019 | 2 | 5 |
| 2020 | 6 | 7 |
| 2021 | 1 | 5 |
| 2022 | 6 | 4 |
| 2023 | 8 | 13 |
| 2024 | 10 | 7 |
| 2025 | 9 | 6 |
| 2026 | 5 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inflating module for use with an inflatable object6 Oct 2026US RE51,054 E1Team Worldwide Corporation
- Multi-pressure integrated air pump18 Aug 2026US 12,710,032 B2Intex Marketing Ltd.
- Rotary inflating and deflating pump30 Jun 2026US 12,669,132 B2Boluo Futian Fumao plastic hardware products Co., Ltd.
- Inflatable pump, inflatable assembly, and inflatable product13 Jan 2026US 12,523,230 B2Zhejiang Natural Outdoor Goods Inc.
- Line-controlled air pump for multi-chamber inflatable products and control method thereof13 Jan 2026US 12,523,238 B1Wangli Plastic & Electronics (Huizhou) Co., Ltd.
- Flow Reversing Pump Apparatus23 Jul 2026US 2026/0210323 A1
- Dual-Chamber Air Pump25 Jun 2026US 2026/0177074 A1
- Voltage regulation and speed regulation control circuit of an air pump4 Jun 2026US 2026/0153080 A1Intex Marketing Ltd.
- Blower compressor assembly30 Apr 2026US 2026/0117668 A1ROLLS-ROYCE plc
- A multi-gear inflation and deflation device for a swimming pool23 Apr 2026US 2026/0110294 A1Intex Industries Xiamen Co. Ltd.
Most cited
By later US patents
- Electrohydraulic energy converter for cardiac assist devices and artificial hearts193US 5,346,458 A1994
- Dual volute molten metal pump and selective outlet discriminating means150US 4,786,230 A1988
- Inflatable product equipped with pump65US 6,793,469 B2Team Worldwide Corporation · 2004
- Inflatable product provided with built-in battery case and socket56US 6,332,760 B1Team Worldwide Corporation · 2001
- Motor-driven air pump with inflating and deflating modes39US 6,679,686 B22004