| 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 |