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Patent applications and USPTO patent grants for Erickson; Frederick L..The latest application filed is for "pilot operated hydraulic valve actuator".
Patent | Date |
---|---|
Pilot operated hydraulic valve actuator Grant 5,248,123 - Richeson , et al. September 28, 1 | 1993-09-28 |
Highly efficient pneumatically powered hydraulically latched actuator Grant 5,152,260 - Erickson , et al. October 6, 1 | 1992-10-06 |
Pneumatic preloaded actuator Grant 5,109,812 - Erickson , et al. May 5, 1 | 1992-05-05 |
Two-stroke-cycle engine with variable valve timing Grant 5,083,533 - Richeson , et al. January 28, 1 | 1992-01-28 |
Hydraulically propelled phneumatically returned valve actuator Grant 5,058,538 - Erickson , et al. October 22, 1 | 1991-10-22 |
Pneumatically powered valve actuator Grant 5,029,516 - Erickson , et al. July 9, 1 | 1991-07-09 |
Actuator with energy recovery return Grant 5,022,359 - Erickson , et al. June 11, 1 | 1991-06-11 |
Pneumatically powered valve actuator Grant 5,003,938 - Erickson , et al. April 2, 1 | 1991-04-02 |
Fast acting valve Grant 4,967,702 - Richeson , et al. * November 6, 1 | 1990-11-06 |
Pneumatic actuator Grant 4,915,015 - Richeson , et al. April 10, 1 | 1990-04-10 |
Pneumatic bistable electronic valve actuator Grant 4,878,464 - Richeson, Jr. , et al. November 7, 1 | 1989-11-07 |
Pneumatic actuator with solenoid operated control valves Grant 4,873,948 - October 17, 1 | 1989-10-17 |
Dual-expansion internal combustion cycle and engine Grant 4,325,331 - Erickson April 20, 1 | 1982-04-20 |
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