Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5092178 | Differential pressure sensor mechanisms | — | 1992-03-03 |
| 5012144 | Linear direct drive motor | Thomas W. Huitema, William H. Eiszner, Jr., Stanley D. Heeres | 1991-04-30 |
| 5004940 | Direct drive valve force motor with gain shaping provision | — | 1991-04-02 |
| 4825904 | Two position flow control valve assembly with position sensing | Richard Grau, Guy S. Newell | 1989-05-02 |
| 4816707 | Limited angle torque motor with wide rotation poles | — | 1989-03-28 |
| 4672992 | Direct drive valve-ball drive mechanism | John W. Meulendyk | 1987-06-16 |
| 4645178 | Redundant drive mechanisms for a direct drive valve and force motor assembly | Eugene J. Martin, James N. Tootle, Walter Joseph Fallows, III, Howard J. Lambers | 1987-02-24 |
| 4641812 | Direct drive valve and force motor assembly including interchangeable stator assembly and alignment system or method | Stanley D. Heeres | 1987-02-10 |
| 4612526 | Torque motor with high torque poles and magnetic centering spring adjustment | William H. Eiszner, Jr. | 1986-09-16 |
| 4600910 | Limited angle torque motor with high torque output multiple coils and increased magnetic centering torque | — | 1986-07-15 |
| 4596970 | Limited angle torque motor with high stiffness and natural frequency | Joseph A. Kelemen | 1986-06-24 |
| 4548089 | Electro-mechanical direct drive valve servo system with rotary to linear valve drive mechanism | — | 1985-10-22 |
| 4534273 | Control actuation system including staged direct drive valve with fault control | — | 1985-08-13 |
| 4533891 | Limited angle torque motor | John W. Meulendyk | 1985-08-06 |
| 4510403 | Limited angle torque motor with magnetic centering and stops | Richard Grau | 1985-04-09 |
| 4507634 | Force motor with null centering and null position bias | — | 1985-03-26 |
| 4472998 | Redundant control actuation system-concentric direct drive valve | — | 1984-09-25 |
| 4466597 | Electro-mechanical direct drive valve servo system with rotary to linear valve drive mechanism | — | 1984-08-21 |
| 4382748 | Opposed piston type free piston engine pump unit | — | 1983-05-10 |
| 4307999 | Free piston engine pump including variable energy rate and acceleration-deceleration controls | — | 1981-12-29 |