F04B 11/00
Equalisation of pulses
Official title: Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
F04B11/00 (Equalisation of pulses) appears on 768 US grants and 673 published applications in this corpus.
Search patents in F04B- Granted patents
- 768
- Published applications
- 673
- Assignees
- 459
- Inventors
- 1,495
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 7 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 7 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 10 | 0 |
| 1990 | 7 | 0 |
| 1991 | 14 | 0 |
| 1992 | 21 | 0 |
| 1993 | 13 | 0 |
| 1994 | 8 | 0 |
| 1995 | 6 | 0 |
| 1996 | 11 | 0 |
| 1997 | 6 | 0 |
| 1998 | 10 | 0 |
| 1999 | 13 | 0 |
| 2000 | 19 | 0 |
| 2001 | 20 | 2 |
| 2002 | 12 | 11 |
| 2003 | 14 | 15 |
| 2004 | 10 | 15 |
| 2005 | 7 | 19 |
| 2006 | 10 | 10 |
| 2007 | 9 | 6 |
| 2008 | 7 | 19 |
| 2009 | 6 | 17 |
| 2010 | 6 | 17 |
| 2011 | 6 | 16 |
| 2012 | 15 | 27 |
| 2013 | 11 | 21 |
| 2014 | 13 | 27 |
| 2015 | 28 | 35 |
| 2016 | 18 | 47 |
| 2017 | 36 | 35 |
| 2018 | 30 | 58 |
| 2019 | 46 | 53 |
| 2020 | 39 | 51 |
| 2021 | 45 | 45 |
| 2022 | 43 | 35 |
| 2023 | 35 | 38 |
| 2024 | 37 | 27 |
| 2025 | 23 | 15 |
| 2026 | 20 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluidic methods and devices6 Oct 2026US 12,753,749 B2Obotics Inc.
- Accumulator for prevention of hydraulic pump cavitation21 Jul 2026US 12,687,156 B2The Boeing Company
- Method for controlling the delivery pressure of a supply pump9 Jun 2026US 12,650,122 B2Henkel AG & Co. KGaA
- Anti-cavitation device, fluid end, and method2 Jun 2026US 12,644,441 B2
- Apparatus for controlling pressure or flow in a fluidic system26 May 2026US 12,638,012 B2Fluigent
- High Pressure Fuel Pump With Configuration To Mitigate Cavitation9 Jul 2026US 2026/0194033 A1
- Double acting pump25 Jun 2026US 2026/0177042 A1Mhwirth AS
- Pulsation dampener for single use applications18 Jun 2026US 2026/0168482 A1Equilibar, LLC
- Bellows pump device11 Jun 2026US 2026/0160241 A1Nippon Pillar Packing Co., Ltd.
- Fluid machine and method for controlling such a machine14 May 2026US 2026/0132780 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Solution pumping system including disposable pump cassette343US 5,062,774 AAbbott Laboratories · 1991
- Quadraplex fluid pump268US 4,470,771 ATowler Hydraulics, Inc. · 1984
- Reducing fluid pressure spikes in a pumping system221US 10,393,108 B2Schlumberger Technology Corporation · 2019
- Automatic pump sequencing and flow rate modulating control system216US 4,269,569 A1981
- Solution pumping for maximizing output while minimizing uneven pumping pressures175US 5,415,528 AAbbott Laboratories · 1995