F04B 11/0041
Equalisation of pulses: by piston speed control
Official title: {by piston speed control (F04B11/0058 takes precedence)}
F04B11/0041 (Equalisation of pulses: by piston speed control) appears on 29 US grants and 30 published applications in this corpus.
Search patents in F04B- Granted patents
- 29
- Published applications
- 30
- Assignees
- 29
- Inventors
- 82
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 2 | 7 |
| 2019 | 1 | 4 |
| 2020 | 2 | 1 |
| 2021 | 2 | 4 |
| 2022 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling the delivery pressure of a supply pump9 Jun 2026US 12,650,122 B2Henkel AG & Co. KGaA
- Liquid feeding pump and liquid feeding method11 Nov 2025US 12,467,908 B2Hitachi High-Tech Corporation
- Hydraulic fracturing pump control system13 Aug 2024US 12,060,877 B2Caterpillar Inc.
- Double-acting piston pump of application system11 Jun 2024US 12,005,470 B2Robatech AG
- Active hydraulic ripple cancellation methods and systems23 Jan 2024US 11,879,451 B2ClearMotion, Inc.
- 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
- Method for Controlling the Delivery Pressure of a Supply Pump19 Dec 2024US 2024/0418160 A1Henkel AG & Co. KGaA
- Liquid Feeding Pump and Liquid Feeding Method30 Nov 2023US 2023/0384271 A1Hitachi High-Tech Corporation
- Double-Acting Piston Pump Of Application System23 Nov 2023US 2023/0372963 A1Robatech AG
- Hydraulic fracturing pump control system24 Mar 2022US 2022/0090594 A1Caterpillar Inc.
Most cited
By later US patents
- Solution pumping system including disposable pump cassette343US 5,062,774 AAbbott Laboratories · 1991
- Solution pumping for maximizing output while minimizing uneven pumping pressures175US 5,415,528 AAbbott Laboratories · 1995
- Cavitation limiting strategies for pumping system171US 10,134,257 B2Caterpillar Inc. · 2018
- Pump control system129US 4,850,805 ACritikon, Inc. · 1989
- Active hydraulic ripple cancellation methods and systems96US 10,954,935 B2ClearMotion, Inc. · 2021