David E. Hackett
33Patents
8h-index
39Co-inventors
75Inventor score
Filing activity: Apr 24, 1975 → Jan 11, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5724939A | Exhaust pulse boosted engine compression braking method | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US5931131A | Valve cover assembly having an integrated heat exchanger for cooling exhaust gases | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6092495A | Method of controlling electronically controlled valves to prevent interference between the valves and a piston | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4531494A | Distributor fuel injection pump having a nutator pump subassembly | Emerging Cross-Sectional Technologies | 17 | Expired |
| US5927257A | Pressure compensating exhaust gas recirculation valve | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD311160S | Pickup truck body | General | 11 | Expired |
| USD316986S | Body for utility vehicle | General | 9 | Expired |
| US5647307A | Valving for dual compression/expansion engine and method of assembling the same | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5611308A | Apparatus for interconnecting an actuator and an exhaust valve opening member | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5365894A | Valve actuation device | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US5435280A | Method of mounting a ceramic valve guide assembly | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5692462A | Transfer valve assembly providing variable valve lash | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6349686B1 | Hydraulically-driven valve and hydraulic system using same | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6647770B2 | Apparatus and method for testing internal combustion engine valves | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US8726884B2 | Quill assembly for a dual fuel common rail fuel system | Emerging Cross-Sectional Technologies | 3 | Active |
| US4080108A | Improved lubrication pump for a torque proportioning differential | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4179952A | Lubrication means for a torque proportioning differential | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5205259A | Modified cylinder head | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4011031A | Rotor constructions for slant axis rotary mechanisms | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| USD284645S | Mini truck | General | 2 | Expired |
| US9291133B2 | Shaft arrangement for an axial piston pump assembly | Emerging Cross-Sectional Technologies | 2 | Active |
| US4047664A | Accumulator type injection valve including a dump valve for fast response | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US5372103A | Method of mounting a ceramic valve guide assembly | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4125030A | Slant axis rotary mechanism | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8991360B2 | Coaxial quill assembly retainer and common rail fuel system using same | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.