F15B 9/04
Controlled by varying the output of a pump with variable capacity
Official title: controlled by varying the output of a pump with variable capacity
F15B9/04 (Controlled by varying the output of a pump with variable capacity) appears on 16 US grants and 17 published applications in this corpus.
Search patents in F15B- Granted patents
- 16
- Published applications
- 17
- Assignees
- 17
- Inventors
- 41
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 3 | 4 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Regenerative pumping system and method27 Jan 2026US 12,535,087 B2Artificial Lift Production International Corp.
- Method for controlling a hydraulic drive and hydraulic drive13 May 2025US 12,297,828 B2Robert Bosch GmbH
- Operation control device for working vehicle23 Mar 2021US 10,954,968 B2Takeuchi Mfg. Co., Ltd.
- Drive system for construction machine12 Jan 2021US 10,889,964 B2Hitachi Construction Machinery Co., Ltd.
- Open and closed circuit parallel drive system and control method based on a four-chamber hydraulic cylinder19 Feb 2026US 2026/0049622 A1Taiyuan University of Technology
- Regenerative Pumping System And Method28 Aug 2025US 2025/0270910 A1Artificial Lift Production International Corp. o/a AL PRO International Corp.
- Method for Controlling a Hydraulic Drive and Hydraulic Drive14 Mar 2024US 2024/0084828 A1Robert Bosch GmbH
- Operation control device for working vehicle8 Oct 2020US 2020/0318656 A1Takeuchi Mfg. Co., Ltd.
- Drive System for Construction Machine30 Apr 2020US 2020/0131736 A1Hitachi Construction Machinery Co., Ltd.
Most cited
By later US patents
- Drive device48US 6,543,223 B2Festo AG & Co. · 2003
- Control system for hydraulic circuit means17US 4,587,808 AHitachi Construction Machinery Co., Ltd. · 1986
- Low power loss electro hydraulic actuator13US 6,209,825 B1Lockheed Martin Corporation · 2001
- Hydraulic closed circuit system6US 9,695,841 B2Hitachi Construction Machinery Co., Ltd. · 2017
- Control of a fluid pump assembly5US 8,435,010 B2Eaton Corporation · 2013