Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6968852 | Shock actuated responsive mechanism with improved dual safety means to prevent over-rotation of the valve reset mechanism and to provide easy access to the reset knob | — | 2005-11-29 |
| 6926025 | Shock actuated responsive mechanism with improved leveraged valve closing activation means for vertical fluid valve assemblies | Richard F. Christensen, Sr., William F. Keller | 2005-08-09 |
| 6814100 | Shock actuated responsive mechanism with means to enable a remote detecting means to determine that the valve assembly has been closed | Fred Mead | 2004-11-09 |
| 6789560 | Shock actuated responsive mechanism with improved safety means to prevent over-rotation of the valve reset mechanism | William F. Keller, Dayna Sibley Stoner | 2004-09-14 |
| 6502599 | Shock actuated responsive mechanism for vertical fluid valve assemblies | William F. Keller | 2003-01-07 |
| 6394122 | Shock actuated sensor for fluid valve | William F. Keller | 2002-05-28 |
| 5295403 | Mechanical actuator | William F. Keller | 1994-03-22 |
| 4915122 | Shock actuated valve | Takashi Ikegaya, William F. Keller | 1990-04-10 |
| 4782848 | Shock actuated device | William F. Keller | 1988-11-08 |
| 4721027 | Double acting linear actuator | William F. Keller | 1988-01-26 |
| 4603591 | Device responsive to shock forces | William F. Keller | 1986-08-05 |
| 4513629 | Shock responsive device | William F. Keller | 1985-04-30 |
| 4503717 | Shock actuated unit | William F. Keller | 1985-03-12 |
| 4475565 | Magnetically actuable shock responsive unit | William F. Keller | 1984-10-09 |
| 4452125 | Manual-hydraulic actuator | William F. Keller | 1984-06-05 |