Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6477836 | Pilot control system | Bernard J. Wulff, John V. Mount | 2002-11-12 |
| 5666807 | Oil processor circuit | — | 1997-09-16 |
| 5471837 | Hydraulic system using multiple substantially identical valve assemblies | — | 1995-12-05 |
| 5293746 | Hydraulic control system | — | 1994-03-15 |
| 5077972 | Load pressure duplicating circuit | Gene R. St. Germain | 1992-01-07 |
| 5063739 | Load sensing hydraulic control system | Gregory Heinz | 1991-11-12 |
| 4487255 | Control for a fluid-driven fan | Robert W. White | 1984-12-11 |
| 4355565 | Fluid circuit with zero leak load check and by-pass valve | — | 1982-10-26 |
| 4354420 | Fluid motor control system providing speed change by combination of displacement and flow control | — | 1982-10-19 |
| 4327549 | Controlled pressure upstaging and flow reduction | Sammy J. Rhodes | 1982-05-04 |
| 4286502 | Hydraulic load lifting system with automatic blocking valve | Edward A. Wirtz | 1981-09-01 |
| 4230022 | Hydraulic rock breaker circuit for an excavator | Lawrence F. Schexnayder | 1980-10-28 |
| 4210061 | Three-circuit fluid system having controlled fluid combining | — | 1980-07-01 |