Class F04B : POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
Subclass 1/18: 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 stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12152582 | Fluid end assembly | May 22, 23 | Nov 26, 24 | Kerr Machine Co. |
| 12044233 | Axial piston pump with inclined plate | Dec 01, 20 | Jul 23, 24 | MIXTRON S.R.L. |
| 11994116 | Axial piston pump with inclined plate | Dec 02, 20 | May 28, 24 | MIXTRON S.R.L. |
| 11828275 | Automatic double-acting valve and pump equipped with said valve | Sep 24, 20 | Nov 28, 23 | Annovi Reverberi S.p.A |
| 11655812 | Fluid end assembly | Aug 05, 22 | May 23, 23 | Kerr Machine Co. |
| 11536267 | Fluid end assembly | Mar 29, 21 | Dec 27, 22 | Kerr Machine Co. |
| 11408419 | Fluid end assembly | May 18, 20 | Aug 09, 22 | Kerr Machine Co. |
| 11286775 | Rotatable piston assembly | Oct 15, 18 | Mar 29, 22 | Poisedon Fluid Power, LLC |
| 10962001 | Fluid end assembly | Jun 10, 20 | Mar 30, 21 | Kerr Machine Co. |
| 10670013 | Fluid end assembly | Jul 13, 18 | Jun 02, 20 | Kerr Machine Co. |
| 10422326 | High pressure generator with bidirectional check valves controlling overpressure | Nov 02, 17 | Sep 24, 19 | SUGINO MACHINE LIMITED |
| 10422325 | Piston engaging with valve for self-priming in fluid sprayers | Sep 14, 17 | Sep 24, 19 | GRACE MINNESOTA INC. |
| 10253770 | Hydraulic pump assembly for a vehicle | Jan 31, 15 | Apr 09, 19 | BorgWarner Sweden AB |
| 10227964 | Hydraulic pump port plate with variable area metering notch | Aug 28, 15 | Mar 12, 19 | Caterpillar Inc. |
| 10145366 | Hydraulic arrangement | Feb 08, 16 | Dec 04, 18 | Danfoss A/S |
| 10100830 | Pump, a homogenizer comprising said pump and a method for pumping a liquid product | Nov 17, 15 | Oct 16, 18 | TETRA LAVAL HOLDINGS & FINANCE SA |
| 10072643 | Steam operated, self cycling, diaphragm water pump | Apr 21, 16 | Sep 11, 18 | Not available |
| 9670914 | Check valve for compressor | Dec 30, 14 | Jun 06, 17 | KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
| 9599100 | Electric-powered pump | Sep 19, 14 | Mar 21, 17 | MITSUBISHI ELECTRIC CORPORATION |
| 9470224 | Piston type compressor | Oct 21, 13 | Oct 18, 16 | KABUSHIKI KAISHA TOYOTA JIDOSHOKKI |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0075,697 | FLUID END ASSEMBLY | Nov 20, 24 | Mar 06, 25 | Not available |
| 2024/0426,294 | FLUID END ASSEMBLY | Jun 05, 24 | Dec 26, 24 | Not available |
| 2024/0102,467 | AXIAL PUMP WITH INCLINED PLATE | Jan 18, 22 | Mar 28, 24 | Not available |
| 2023/0116,452 | FLUID END ASSEMBLY | Dec 13, 22 | Apr 13, 23 | Not available |
| 2018/0313,341 | WOBBLE PLATE PISTON PUMP FOR LOW FLOW GAS AND ELECTRIC WATER PRESSURE WASHERS | Jun 25, 18 | Nov 01, 18 | Not available |
| 2016/0377,065 | Duplex Metering Pump Having a Single Liquid End | Jun 22, 16 | Dec 29, 16 | Not available |
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