F04D 27/001
Testing thereof
Official title: {Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring}
F04D27/001 (Testing thereof) appears on 939 US grants and 1,155 published applications in this corpus.
Search patents in F04D- Granted patents
- 939
- Published applications
- 1,155
- Assignees
- 505
- Inventors
- 2,563
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 1 |
| 2002 | 7 | 9 |
| 2003 | 6 | 9 |
| 2004 | 7 | 8 |
| 2005 | 7 | 10 |
| 2006 | 7 | 12 |
| 2007 | 4 | 20 |
| 2008 | 12 | 22 |
| 2009 | 7 | 25 |
| 2010 | 11 | 29 |
| 2011 | 16 | 23 |
| 2012 | 24 | 41 |
| 2013 | 21 | 50 |
| 2014 | 35 | 56 |
| 2015 | 28 | 58 |
| 2016 | 35 | 66 |
| 2017 | 49 | 96 |
| 2018 | 57 | 88 |
| 2019 | 88 | 62 |
| 2020 | 84 | 55 |
| 2021 | 51 | 87 |
| 2022 | 70 | 77 |
| 2023 | 69 | 72 |
| 2024 | 78 | 54 |
| 2025 | 54 | 75 |
| 2026 | 36 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- System and method for monitoring pump vibrations4 Aug 2026US 12,698,781 B2S.P.M. Instrument AB
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- Variable speed pumping system and method8 Oct 2026US 2026/0309157 A1Pentair Water Pool and Spa, Inc.
- Fluid delivery system health monitoring systems and methods1 Oct 2026US 2026/0298249 A1Oshkosh Corporation
- Variable speed pumping system and method1 Oct 2026US 2026/0298251 A1Pentair Water Pool and Spa, Inc.
- Device for Forming a Sliding Bearing or a Slip-Ring Seal Having Integrated Temperature Measurement24 Sep 2026US 2026/0287012 A1KSB SE & Co. KGaA
- Method for controlling the operating parameters of a turbomolecular vacuum pump17 Sep 2026US 2026/0275993 A1Pfeiffer Vacuum GmbH
Most cited
By later US patents
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- Bed with user occupancy tracking116US 10,092,242 B2Sleep Number Corporation · 2018
- Electronic control for monitoring status of a compressor111US 4,990,057 AJohnson Service Company · 1991
- Turbo vacuum pump with a magnetically levitated rotor and a control unit for displacing the rotator at various angles to scrape deposits from the inside of the pump98US 5,961,291 AHitachi, Ltd. · 1999