Issued Patents All Time
Showing 25 most recent of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10125750 | Radial piston pump assemblies and use thereof in hydraulic circuits | Joe Pfaff, Bradley Kramer, Eric P. Hamkins | 2018-11-13 |
| 8926298 | Hydraulic piston pump with a variable displacement throttle mechanism | Prashant K. Rajput | 2015-01-06 |
| 8869521 | Fluid working machine with cylinders coupled to split exterior ports by electrohydraulic valves | Prashant K. Rajput | 2014-10-28 |
| 7905088 | Energy recovery and reuse techniques for a hydraulic system | Eric P. Hamkins, Joseph L. Pfaff, Keith A. Tabor | 2011-03-15 |
| 7823379 | Energy recovery and reuse methods for a hydraulic system | Eric P. Hamkins, Joseph L. Pfaff, Keith A. Tabor | 2010-11-02 |
| 7753078 | Hybrid hydraulic joystick with an integral pressure sensor and an outlet port | Brian R. Bertolasi, Joseph L. Pfaff | 2010-07-13 |
| 7487707 | Hydraulic valve assembly with a pressure compensated directional spool valve and a regeneration shunt valve | Joseph L. Pfaff | 2009-02-10 |
| 7409825 | Hydraulic system with a cylinder isolation valve | — | 2008-08-12 |
| 7341236 | Pilot operated valve with a pressure balanced poppet | Xiaolong Yang, Randall J. Jackson, R. Christopher Hughes | 2008-03-11 |
| 7270046 | Integrated valve assembly and computer controller for a distributed hydraulic control system | Michael J. Paik, Peter A. Jahnke | 2007-09-18 |
| D542307 | Hydraulic valve manifold block | Michael J. Paik, Peter A. Jahnke | 2007-05-08 |
| D540347 | Electronic controller and hydraulic valve block assembly | Michael J. Paik, Peter A. Jahnke | 2007-04-10 |
| 7137331 | Hydraulic cylinder device | Masaki Dohgami | 2006-11-21 |
| 6715402 | Hydraulic control circuit for operating a split actuator mechanical mechanism | Joseph L. Pfaff | 2004-04-06 |
| 6705079 | Apparatus for controlling bounce of hydraulically powered equipment | Keith A. Tabor, Joseph L. Pfaff | 2004-03-16 |
| 6647718 | Electronically controlled hydraulic system for lowering a boom in an emergency | — | 2003-11-18 |
| 6502393 | Hydraulic system with cross function regeneration | Randall S. Jackson, Brian Clifton | 2003-01-07 |
| 6467264 | Hydraulic circuit with a return line metering valve and method of operation | Joseph L. Pfaff | 2002-10-22 |
| 6457487 | Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load | Joseph L. Pfaff | 2002-10-01 |
| 6398182 | Pilot solenoid control valve with an emergency operator | — | 2002-06-04 |
| 6397655 | Auto-calibration of a solenoid operated valve | — | 2002-06-04 |
| 6330798 | Hydraulic system with shadow poppet valve | — | 2001-12-18 |
| 6328275 | Bidirectional pilot operated control valve | Xiaolong Yang, Michael J. Paik | 2001-12-11 |
| 6202016 | Shift on the go transmission system | Russell P. Schuchmann | 2001-03-13 |
| 6076349 | Hydrostatic automotive or high speed steering system | Timothy A. Hjelsand | 2000-06-20 |