F04B 49/002
Hydraulic systems to change the pump delivery
Official title: {Hydraulic systems to change the pump delivery}
F04B49/002 (Hydraulic systems to change the pump delivery) appears on 423 US grants and 363 published applications in this corpus.
Search patents in F04B- Granted patents
- 423
- Published applications
- 363
- Assignees
- 178
- Inventors
- 753
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 14 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 0 |
| 2002 | 12 | 4 |
| 2003 | 4 | 3 |
| 2004 | 5 | 6 |
| 2005 | 3 | 8 |
| 2006 | 7 | 9 |
| 2007 | 3 | 7 |
| 2008 | 9 | 11 |
| 2009 | 3 | 11 |
| 2010 | 6 | 11 |
| 2011 | 6 | 13 |
| 2012 | 10 | 15 |
| 2013 | 13 | 19 |
| 2014 | 11 | 26 |
| 2015 | 16 | 20 |
| 2016 | 16 | 10 |
| 2017 | 15 | 12 |
| 2018 | 16 | 31 |
| 2019 | 14 | 14 |
| 2020 | 22 | 30 |
| 2021 | 19 | 24 |
| 2022 | 19 | 10 |
| 2023 | 23 | 15 |
| 2024 | 23 | 30 |
| 2025 | 25 | 15 |
| 2026 | 12 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrohydraulic control device and adjustable hydraulic pump system6 Oct 2026US 12,753,781 B2HAWE Hydraulik SE
- Solenoid concept for pump control of a variable displacement piston pump29 Sep 2026US 12,747,727 B2Hamilton Sundstrand Corporation
- Multi-phase fluid pump system with driving fluid and pump fluid cylinders and buffer chambers22 Sep 2026US 12,742,449 B2I-Jack Technologies Incorporated
- Axial piston machine with neutral valve integrated in the pot-like housing part11 Aug 2026US 12,704,108 B2Robert Bosch GmbH
- Method with a hydraulic pressure medium supply arrangement, and hydraulic pressure medium supply arrangement9 Jun 2026US 12,650,117 B2Robert Bosch GmbH
- Pump system24 Sep 2026US 2026/0286952 A1
- Pump system20 Aug 2026US 2026/0243247 A1
- Capacity control for diaphragm compressor13 Aug 2026US 2026/0235116 A1
- Device for controlling a hydraulic pump or a hydraulic motor18 Jun 2026US 2026/0168523 A1Andreas Lupold Hydrotechnik GmbH
- Hydraulic system11 Jun 2026US 2026/0163513 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- Radial piston pump assemblies and use thereof in hydraulic circuits95US 10,125,750 B2HUSCO International, Inc. · 2018
- Drain safety and pump control device95US 7,931,447 B2Hayward Industries, Inc. · 2011
- Hydraulically powered compressor and hydraulic control and power system therefor90US 4,653,986 ATidewater Compression Service, Inc. · 1987
- Pump unit77US 6,425,244 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002
- Tandem pump unit64US 6,487,856 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002