F04B 1/32
By varying the relative positions of a swash plate and a cylinder
Official title: by varying the relative positions of a swash plate and a cylinder block
F04B1/32 (By varying the relative positions of a swash plate and a cylinder) appears on 516 US grants and 406 published applications in this corpus.
Search patents in F04B- Granted patents
- 516
- Published applications
- 406
- Assignees
- 194
- Inventors
- 861
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 8 | 0 |
| 2000 | 8 | 0 |
| 2001 | 10 | 1 |
| 2002 | 15 | 10 |
| 2003 | 15 | 7 |
| 2004 | 14 | 10 |
| 2005 | 10 | 17 |
| 2006 | 17 | 16 |
| 2007 | 11 | 11 |
| 2008 | 16 | 9 |
| 2009 | 8 | 10 |
| 2010 | 9 | 20 |
| 2011 | 7 | 11 |
| 2012 | 8 | 7 |
| 2013 | 14 | 15 |
| 2014 | 6 | 23 |
| 2015 | 17 | 22 |
| 2016 | 12 | 20 |
| 2017 | 16 | 19 |
| 2018 | 16 | 24 |
| 2019 | 20 | 19 |
| 2020 | 22 | 36 |
| 2021 | 30 | 16 |
| 2022 | 21 | 18 |
| 2023 | 20 | 18 |
| 2024 | 25 | 23 |
| 2025 | 18 | 14 |
| 2026 | 13 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Rotary swash plate hydraulic pump15 Sep 2026US 12,736,037 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic motor15 Sep 2026US 12,736,038 B2Nachi-Fujikoshi Corp.
- Hydraulic control circuit for controlling fan blade pitch14 Jul 2026US 12,680,533 B2Safran Aircraft Engines
- Hydraulic pump state monitoring device and hydraulic drive system10 Sep 2026US 2026/0266272 A1Hitachi Construction Machinery Co., Ltd.
- Wobble plate for sprayer cleaning systems18 Jun 2026US 2026/0166572 A1Techtronic Cordless GP
- Construction machine and control method thereof18 Jun 2026US 2026/0168209 A1Hd Hyundai Infracore Co., Ltd.
- 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
- Electronic control for a rotary fluid device171US 10,100,827 B2Eaton Intelligent Power Limited · 2018
- Apparatus and method for customizing cosmetic products112US 6,510,366 B1Elizabeth Arden Co., Division of Conopco, Inc. · 2003
- Pump94US 6,332,393 B1Hydro-Gear Limited Partnership · 2001
- Dual pump apparatus comprising dual drive shafts and auxiliary pump78US 6,672,843 B1Hydro-Gear Limited Partnership · 2004
- Pump unit77US 6,425,244 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002