F04D 23/00
Non-positive-displacement pumps: other rotary non-positive-displacement pumps
Official title: Other rotary non-positive-displacement pumps (pumping installations or systems F04D25/00)
F04D23/00 (Non-positive-displacement pumps: other rotary non-positive-displacement pumps) appears on 389 US grants and 282 published applications in this corpus.
Search patents in F04D- Granted patents
- 389
- Published applications
- 282
- Assignees
- 209
- Inventors
- 678
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 8 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 10 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 13 | 0 |
| 1995 | 5 | 0 |
| 1996 | 14 | 0 |
| 1997 | 12 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 3 | 2 |
| 2002 | 13 | 5 |
| 2003 | 5 | 11 |
| 2004 | 7 | 4 |
| 2005 | 5 | 15 |
| 2006 | 7 | 12 |
| 2007 | 9 | 15 |
| 2008 | 5 | 5 |
| 2009 | 4 | 10 |
| 2010 | 6 | 7 |
| 2011 | 6 | 7 |
| 2012 | 6 | 14 |
| 2013 | 4 | 16 |
| 2014 | 9 | 14 |
| 2015 | 11 | 12 |
| 2016 | 10 | 11 |
| 2017 | 10 | 10 |
| 2018 | 9 | 19 |
| 2019 | 10 | 11 |
| 2020 | 15 | 14 |
| 2021 | 10 | 16 |
| 2022 | 15 | 10 |
| 2023 | 15 | 9 |
| 2024 | 13 | 14 |
| 2025 | 7 | 13 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Side-channel machine (compressor, vacuum pump or blower) having an extraction duct in the stripper29 Sep 2026US 12,747,732 B2Gardner Denver Deutschland GmbH
- Blowing suction device22 Sep 2026US 12,740,517 B2Positec Power Tools (Suzhou) Co., Ltd.
- Cooling component for automobile and manufacturing method of cooling component for automobile14 Jul 2026US 12,680,554 B2Yamada Manufacturing Co., Ltd.
- Gas propulsion thrust device5 May 2026US 12,618,418 B1
- Side channel compressor having a seal assembly14 Apr 2026US 12,601,359 B2Gardner Denver Deutschland GmbH
- Side channel compressor having a seal assembly20 Aug 2026US 2026/0243268 A1
- Balance drums and systems for managing axial forces for pumps and related systems and methods16 Jul 2026US 2026/0201891 A1
- Compressor and Multi Stack Fuel Cell19 Mar 2026US 2026/0081193 A1KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
- Magnetic rotor apparatus for a side channel compressor for a fuel cell system, side channel compressor and method of manufacturing a magnetic rotor apparatus for a side channel compressor for a fuel cell system12 Feb 2026US 2026/0045841 A1Robert Bosch GmbH
- Air moving device1 Jan 2026US 2026/0002542 A1xMEMS Labs, Inc.
Most cited
By later US patents
- Portable drag compressor powered mechanical ventilator220US 5,868,133 ABird Products Corporation · 1999
- Portable drag compressor powered mechanical ventilator201US 6,877,511 B2Bird Products Corporation · 2005
- Portable drag compressor powered mechanical ventilator180US 6,526,970 B22003
- Portable drag compressor powered mechanical ventilator146US 5,694,926 ABird Products Corporation · 1997
- Portable drag compressor powered mechanical ventilator126US 7,222,623 B2Birds Products Corporation · 2007