F04B 2205/06
Pressure in a circuit
Official title: Pressure in a (hydraulic) circuit
F04B2205/06 (Pressure in a circuit) appears on 187 US grants and 139 published applications in this corpus.
Search patents in F04B- Granted patents
- 187
- Published applications
- 139
- Assignees
- 131
- Inventors
- 443
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 13 | 0 |
| 1999 | 9 | 0 |
| 2000 | 12 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 5 |
| 2003 | 6 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 5 |
| 2009 | 2 | 1 |
| 2010 | 0 | 2 |
| 2011 | 2 | 0 |
| 2012 | 2 | 1 |
| 2013 | 0 | 13 |
| 2014 | 3 | 4 |
| 2015 | 2 | 4 |
| 2016 | 5 | 3 |
| 2017 | 3 | 4 |
| 2018 | 2 | 13 |
| 2019 | 7 | 9 |
| 2020 | 8 | 9 |
| 2021 | 12 | 14 |
| 2022 | 11 | 8 |
| 2023 | 9 | 10 |
| 2024 | 9 | 15 |
| 2025 | 12 | 9 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for delivering metered fluid at elevated pressure22 Sep 2026US 12,742,443 B1Prince Sattam Bin Abdulaziz University
- Method for operating a pump system9 Jun 2026US 12,650,120 B2Leybold Aktiengesellschaft
- Protection of make-up system for high pressure bellows-style pump system28 Apr 2026US 12,612,909 B2Halliburton Energy Services.Inc.
- Tube pump system and control method of the same27 Jan 2026US 12,535,065 B2Surpass Industry Co., Ltd.
- Electric air compressor control6 Jan 2026US 12,515,525 B2Volvo Truck Corporation
- Vacuum control system for sap flow optimization, and method of controlling pressure within a conduit network of a sap collection system13 Aug 2026US 2026/0231874 A1Les éQuipements Lapierre Inc.
- Compressor unit30 Jul 2026US 2026/0218700 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Systems and methods for operation modes for an air compressor18 Jun 2026US 2026/0168487 A1Doosan Bobcat North America, Inc.
- Food-processing machine9 Apr 2026US 2026/0098524 A1Provisur Technologies, Inc.
- Control calibration apparatus for variable-capacity pump and method thereof2 Oct 2025US 2025/0305495 A1Caterpillar SARL
Most cited
By later US patents
- Control device and process for a pumping device167US 6,558,347 B1Fresenius Vial SAS · 2003
- System and method for operating a respirator compressor system under low voltage conditions166US 5,368,019 APuritan-Bennett Corporation · 1994
- Real time remote sensing pressure control system using periodically sampled remote sensors136US 5,540,555 AUnosource Controls, Inc. · 1996
- System and method for controlling rotary screw compressors125US 6,450,771 B1Coltec Industries Inc. · 2002
- System and methods for controlling rotary screw compressors122US 5,713,724 AColtec Industries Inc. · 1998