Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6572339 | Positive displacement fluid pump having improved fill characteristics | Dan C. Pasma, David B. Ellsworth | 2003-06-03 |
| 6237735 | Viscous actuated ball ramp clutch having one-way clutch | David M. Preston | 2001-05-29 |
| 6182808 | Viscous actuated ball ramp clutch having through shaft capability | Michael W. Nank, William N. Eybergen, James K. Spring | 2001-02-06 |
| 6102178 | Viscous actuated ball ramp clutch | — | 2000-08-15 |
| 5967276 | Viscous actuated ball ramp clutch and improved housing therefor | Wayne K. Leichliter | 1999-10-19 |
| 5829565 | One-way clutch | Donald J. Fergle, James M. Brown | 1998-11-03 |
| 5782715 | Dual ratio viscous fan drive | James R. DeBrabander, David P. Godlew | 1998-07-21 |
| 5137300 | Vehicle suspension with auxiliary leaf spring and squat control system | — | 1992-08-11 |
| 5129633 | Hydraulic actuator for parallel auxiliary leaf springs | David M. Preston, James L. Oliver, James A. Juriga | 1992-07-14 |
| 5129671 | Vehicle suspension with auxiliary leaf spring with load control system | — | 1992-07-14 |
| 5123672 | Vehicle suspension with auxiliary leaf spring with roll control system | Frank Waksmundzki | 1992-06-23 |
| 5098121 | Vehicle suspension with auiliary leaf springs | David M. Preston, James L. Oliver, James A. Juriga | 1992-03-24 |
| 5035408 | Jounce responsive actuator for parallel auxiliary spring | David M. Preston, James L. Oliver, James A. Juriga | 1991-07-30 |
| 5029893 | Vehicle suspension with auxiliary leaf springs | David M. Preston, James L. Oliver, James A. Juriga | 1991-07-09 |
| 5024463 | Manually power mechanical actuator for parallel auxiliary spring | James L. Oliver, James A. Juriga, David M. Preston | 1991-06-18 |
| 4982972 | Hydraulic pump and actuator for parallel auxiliary leaf spring | David M. Preston, James L. Oliver, James A. Juriga | 1991-01-08 |
| 4936143 | Cylinders having piston position measurement | Herman P. Schutten, Robert W. Lade | 1990-06-26 |
| 4909342 | Four wheel steering system | David A. Janson | 1990-03-20 |
| 4838374 | Speed responsive rear wheel steering | — | 1989-06-13 |
| 4830129 | Apparatus for four wheel steering vehicle | — | 1989-05-16 |
| 4776419 | Four wheel steering system | — | 1988-10-11 |
| 4762096 | Engine valve control mechanism | Lawrence J. Kamm, Lawrence L. Meyer | 1988-08-09 |