Douglas E. Ivers
31Patents
21h-index
47Co-inventors
85Inventor score
Filing activity: Feb 10, 1989 → Mar 29, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4887699A | Vibration attenuating method utilizing continuously variable semiactive damper | Performing Operations; Transporting | 110 | Expired |
| US6095486A | Two-way magnetorheological fluid valve assembly and devices utilizing same | Emerging Cross-Sectional Technologies | 106 | Expired |
| US5570286A | Regenerative system including an energy transformer which requires no external power source to drive same | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US5276622A | System for reducing suspension end-stop collisions | Performing Operations; Transporting | 69 | Expired |
| US8322497B2 | Magneto-rheological dampers for semi-active suspension systems | Performing Operations; Transporting | 54 | Active |
| US6158470A | Two-way magnetorheological fluid valve assembly and devices utilizing same | Emerging Cross-Sectional Technologies | 49 | Expired |
| US6009985A | Efficient multi-directional active vibration absorber assembly | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US4921272A | Semi-active damper valve means with electromagnetically movable discs in the piston | Performing Operations; Transporting | 46 | Expired |
| US6002778A | Active structural control system and method including active vibration absorbers (AVAS) | Physics | 44 | Expired |
| US5906254A | Active systems and devices including active vibration absorbers (AVAS) | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US7448854B2 | Helicopter vibration control system and rotary force generator for canceling vibrations | Performing Operations; Transporting | 36 | Expired |
| US7942248B2 | Adjustable damping control with end stop | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US4972929A | Bidirectional dual disc valve assembly | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5004079A | Semi-active damper valve means and method | Performing Operations; Transporting | 34 | Expired |
| US6311110A | Adaptive off-state control method | Performing Operations; Transporting | 34 | Expired |
| US5957440A | Active fluid mounting | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US5947457A | Fluid-filled active vibration absorber | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US5551650A | Active mounts for aircraft engines | Physics | 31 | Expired |
| US6695294B2 | Controlled equilibrium device with displacement dependent spring rates and integral damping | Performing Operations; Transporting | 29 | Expired |
| US6983833B2 | Self-tuning vibration absorber system and method of absorbing varying frequency vehicle vibrations | Performing Operations; Transporting | 28 | Expired |
| US9073627B2 | Helicopter vibration control system and circular force generation systems for canceling vibrations | Emerging Cross-Sectional Technologies | 24 | Active |
| US6213442A | Isolation system for isolation tables and the like | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5730429A | Decouplers for active devices | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US8162606B2 | Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations | Emerging Cross-Sectional Technologies | 17 | Active |
| US8313296B2 | Helicopter vibration control system and rotary force generator for canceling vibrations | Performing Operations; Transporting | 16 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.