F04B 1/28
Of machines or pumps with stationary cylinders
Official title: of machines or pumps with stationary cylinders
F04B1/28 (Of machines or pumps with stationary cylinders) appears on 182 US grants and 207 published applications in this corpus.
Search patents in F04B- Granted patents
- 182
- Published applications
- 207
- Assignees
- 108
- Inventors
- 455
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 2 |
| 2003 | 4 | 6 |
| 2004 | 4 | 4 |
| 2005 | 6 | 5 |
| 2006 | 2 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 6 |
| 2011 | 1 | 4 |
| 2012 | 2 | 2 |
| 2013 | 2 | 6 |
| 2014 | 2 | 8 |
| 2015 | 10 | 17 |
| 2016 | 6 | 12 |
| 2017 | 10 | 16 |
| 2018 | 9 | 13 |
| 2019 | 10 | 7 |
| 2020 | 10 | 17 |
| 2021 | 11 | 14 |
| 2022 | 16 | 14 |
| 2023 | 15 | 8 |
| 2024 | 13 | 18 |
| 2025 | 16 | 16 |
| 2026 | 11 | 7 |
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 system8 Sep 2026US 12,729,700 B2Kawasaki Jukogyo Kabushiki Kaisha
- Method with a hydraulic pressure medium supply arrangement, and hydraulic pressure medium supply arrangement9 Jun 2026US 12,650,117 B2Robert Bosch GmbH
- Wobble plate for sprayer cleaning systems18 Jun 2026US 2026/0166572 A1Techtronic Cordless GP
- 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
- Variable displacement pump and method for regulating such pump30 Apr 2026US 2026/0117761 A1Casappa S.P.A.
- Hydraulic pump with de-stroke control29 Jan 2026US 2026/0028799 A1Caterpillar Inc.
Most cited
By later US patents
- Piston engine balancing33US 6,460,450 B1R. Sanderson Management, Inc. · 2002
- Double-headed piston type swash plate compressor33US 9,581,149 B2Kabushiki Kaisha Toyota Jidoshokki · 2017
- Fluid delivery system32US 10,029,540 B2Caterpillar Inc. · 2018
- Hydrostatic axial piston machine26US 6,155,798 ALinde Aktiengesellschaft · 2000
- Axial-piston drive system with a continuously adjustable piston stroke26US 6,957,604 B1Zexel Corporation · 2005