F04B 1/20
Having rotary cylinder block
Official title: having rotary cylinder block
F04B1/20 (Having rotary cylinder block) appears on 898 US grants and 710 published applications in this corpus.
Search patents in F04B- Granted patents
- 898
- Published applications
- 710
- Assignees
- 285
- Inventors
- 1,366
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 9 | 0 |
| 1978 | 10 | 0 |
| 1979 | 8 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 17 | 0 |
| 1985 | 13 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 13 | 0 |
| 1989 | 11 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 12 | 0 |
| 1993 | 16 | 0 |
| 1994 | 10 | 0 |
| 1995 | 4 | 0 |
| 1996 | 12 | 0 |
| 1997 | 16 | 0 |
| 1998 | 20 | 0 |
| 1999 | 17 | 0 |
| 2000 | 17 | 0 |
| 2001 | 11 | 0 |
| 2002 | 20 | 17 |
| 2003 | 20 | 23 |
| 2004 | 17 | 27 |
| 2005 | 16 | 31 |
| 2006 | 24 | 39 |
| 2007 | 23 | 32 |
| 2008 | 34 | 21 |
| 2009 | 19 | 25 |
| 2010 | 20 | 22 |
| 2011 | 12 | 18 |
| 2012 | 15 | 16 |
| 2013 | 14 | 27 |
| 2014 | 19 | 30 |
| 2015 | 21 | 61 |
| 2016 | 22 | 40 |
| 2017 | 31 | 41 |
| 2018 | 36 | 23 |
| 2019 | 46 | 33 |
| 2020 | 39 | 39 |
| 2021 | 37 | 29 |
| 2022 | 24 | 19 |
| 2023 | 24 | 25 |
| 2024 | 26 | 26 |
| 2025 | 24 | 29 |
| 2026 | 27 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary swash plate hydraulic pump15 Sep 2026US 12,736,037 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic motor15 Sep 2026US 12,736,038 B2Nachi-Fujikoshi Corp.
- Cylinder block with detected portions and hydraulic device including same15 Sep 2026US 12,736,046 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic system8 Sep 2026US 12,729,700 B2Kawasaki Jukogyo Kabushiki Kaisha
- Hydraulic axial piston machine25 Aug 2026US 12,716,356 B2Danfoss A/S
- Hydrostatic Rotary Machine Having Counting Apertures on a Second Brake Disc24 Sep 2026US 2026/0286951 A1Robert Bosch GmbH
- Improved axial piston hydraulic machine6 Aug 2026US 2026/0226888 A1
- Slipper component with ceramic surface30 Jul 2026US 2026/0218689 A1Ocean Pacific Technologies
- Wobble plate for sprayer cleaning systems18 Jun 2026US 2026/0166572 A1Techtronic Cordless GP
- Pressure source unit14 May 2026US 2026/0132782 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- 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
- Integrated motor pump combination70US 4,850,812 AF.P.I., Inc. · 1989
- Pressure exchanger with an anti-cavitation pressure relief system in the end covers70US 6,540,487 B2Energy Recovery, Inc. · 2003
- Tandem pump unit64US 6,487,856 B1Kanzaki Kokyukoki Mfg.Co., Ltd. · 2002