Class F04B : POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
Subclass 1/20: Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (F04B 3/00 takes precedence; fluid-driven pumps F04B 9/08; control of reciprocating machines or pumps in general F04B 49/00) having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12188459 | Valve plate, cylinder block, and hydraulic pump/motor | Sep 07, 21 | Jan 07, 25 | Komatsu Ltd. |
| 12031559 | Integrated electro-hydraulic unit | Jul 07, 23 | Jul 09, 24 | Robert Bosch GmbH |
| 11946462 | Hydraulic axial piston unit and method for controlling of a hydraulic axial piston unit | Dec 02, 19 | Apr 02, 24 | Danfoss Power Solutions Inc. |
| 11619214 | Hydraulic machine, hydraulic assembly having the hydraulic machine, and hydraulic axle having the hydraulic machine | Jan 07, 19 | Apr 04, 23 | Robert Bosch GmbH |
| 11592000 | Servoless motor | Jul 31, 18 | Feb 28, 23 | Danfoss Power Solutions Inc. |
| 11555488 | Valve plate assembly | Sep 30, 20 | Jan 17, 23 | Danfoss A/S |
| 11536258 | Compressor including cylinder block corresponding to outer rotor type motor | Oct 22, 19 | Dec 27, 22 | LG Electronics Inc. |
| 11460013 | Bent axis hydraulic pump with centrifugal assist | Nov 15, 18 | Oct 04, 22 | Parker-Hannifin Corporation |
| 11396872 | Axial piston-type hydraulic rotary machine | Nov 03, 17 | Jul 26, 22 | Hitachi Construction Machinery Co., Ltd. |
| 11333136 | Fluid pump with cam geometry to reduce pulsations | Nov 21, 18 | May 17, 22 | AISIN CORPORATION |
| 11293418 | Fluid pump with cam geometry to reduce pulsations | Nov 21, 18 | Apr 05, 22 | AISIN CORPORATION |
| 11286775 | Rotatable piston assembly | Oct 15, 18 | Mar 29, 22 | Poisedon Fluid Power, LLC |
| 11236736 | Axial piston pump with port plate having balance feed aperture relief feature | Sep 27, 19 | Feb 01, 22 | Honeywell International, Inc. |
| 11215172 | Hydrostatic positive displacement machine | Aug 02, 19 | Jan 04, 22 | Robert Bosch GmbH |
| 11162481 | Axial piston machine with pressure relief in the through drive space | Apr 11, 19 | Nov 02, 21 | Robert Bosch GmbH |
| 11118610 | Low profile electro-hydrostatic actuator | Aug 29, 17 | Sep 14, 21 | The Boeing Company |
| 11034439 | Duplicated hydraulic circuit with pressure regulation | Jun 22, 17 | Jun 15, 21 | AIRBUS HELICOPTERS |
| 11035351 | Hydraulic machine | Jan 23, 19 | Jun 15, 21 | Danfoss A/.S |
| 11022105 | Connector plate, hydraulic machine having a connector plate, and hydrostatic unit having a hydraulic machine and a hydraulic attachment part | Mar 01, 18 | Jun 01, 21 | Robert Bosch GmbH |
| 11002244 | Hydrostatic axial piston machine | Apr 08, 19 | May 11, 21 | Robert Bosch GmbH |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0101,966 | INTEGRATED ELECTRO-HYDRAULIC UNIT | Sep 27, 23 | Mar 27, 25 | Not available |
| 2020/0124,034 | SYNCHRONIZING JOINT | Oct 21, 19 | Apr 23, 20 | Not available |
| 2020/0072,196 | Piston Pump with a High Delivery Rate at a Low Rotational Speed and Use of a Piston Pump in a Wind Turbine | Dec 12, 17 | Mar 05, 20 | Not available |
| 2020/0063,723 | HYDRAULIC ROTARY MACHINE | Mar 07, 17 | Feb 27, 20 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) |
| 2020/0063,722 | HYDRAULIC DEVICE | May 02, 18 | Feb 27, 20 | INNAS BV |
| 2020/0011,307 | ROTARY TYPE VALVE PLATE COMPRESSOR | Nov 20, 18 | Jan 09, 20 | Hyundai Motor Company; Hyundai Motor Company & Kia Motors Corporation; |
| 2019/0390,663 | HYDRAULIC PUMP WITH INLET BAFFLE | Jun 16, 17 | Dec 26, 19 | Not available |
| 2019/0309,738 | Hydrostatic Axial Piston Machine | Apr 04, 19 | Oct 10, 19 | Not available |
| 2019/0211,811 | A HYDRAULIC DEVICE | May 17, 17 | Jul 11, 19 | Not available |
| 2019/0145,388 | HYDRAULIC ROTARY MACHINE AND VALVE PLATE THEREOF | Sep 14, 16 | May 16, 19 | KYB Corporation |
| 2019/0055,931 | HYDRAULIC ROTARY MACHINE | Sep 14, 16 | Feb 21, 19 | KYB Corporation |
| 2018/0156,207 | AXIAL PISTON HYDRAULIC PUMP | Dec 06, 17 | Jun 07, 18 | Not available |
| 2016/0377,066 | WATER-HYDRAULIC MACHINE | Jun 16, 16 | Dec 29, 16 | DANFOSS A/S |
| 2016/0084,241 | ULTRA-HIGH PRESSURE GENERATOR | Sep 02, 15 | Mar 24, 16 | SUGINO MACHINE LIMITED |
| 2016/0076,525 | AXIAL PISTON PUMP | May 15, 14 | Mar 17, 16 | HYDAC DRIVE CENTER GMBH |
| 2016/0025,080 | APPARATUS INCLUDING SWASHPLATES FIXED ON SHAFT ASSEMBLY AND PISTON ASSEMBLIES | Jul 16, 15 | Jan 28, 16 | Not available |
| 2016/0025,081 | HYDRAULIC PUMP WITH DOUBLE DIRECTION OF ROTATION | Mar 27, 14 | Jan 28, 16 | HYDRO LEDUC |
| 2015/0252,763 | FUEL PUMP | Jul 05, 13 | Sep 10, 15 | KAWASAKI JUKOGYO KABUSHIKI KAISHA |
| 2015/0152,854 | Variable Displacement Compressor | May 20, 13 | Jun 04, 15 | SANDEN HOLDINGS CORPORATION |
| 2015/0078,930 | FLUID PRESSURE PUMP | Mar 26, 13 | Mar 19, 15 | MITSUBISHI HEAVY INDUSTRIES, LTD. |
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