Friedrich Ehrlinger
30Patents
15h-index
26Co-inventors
81Inventor score
Filing activity: Oct 6, 1975 → Oct 21, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4046031A | Planetary-gear transmission | Mechanical Engineering; Lighting; Heating | 48 | Expired |
| US6805648B1 | Electrodynamic drive train | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4213514A | Hydraulic wheel drive with clutch | Performing Operations; Transporting | 33 | Expired |
| US4286477A | Steplessly adjustable variable-speed hydrostatic-mechanical composite transmission | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4275616A | Hydraulic wheel drive | Performing Operations; Transporting | 27 | Expired |
| US4291592A | Load splitting hydromechanical transmission | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4200006A | Gear-change transmission with differential | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4191072A | Transmission with hydrodynamic torque converter and retarder | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4368798A | Automatic control device of an infinitely variable transmission gear driven by an internal combustion engine, especially for motorized vehicles | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4667798A | Forced-cooling friction brake or clutch | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4775026A | Actuation of a differential lock | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4428257A | Motor vehicle control for an infinitely variable transmission | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4304151A | Stepless composite hydrostatic-mechanical transmission | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4624353A | Friction device | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4884669A | Motor-vehicle antirunaway system | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4667527A | Spring-loaded brake with pressure-medium-operable lifting set | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4685343A | Powershift gearbox/transmission | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4526054A | Gear transmission with splash lubrication | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6440032B1 | Transmission system | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4671377A | All-wheel drive for a vehicle | Performing Operations; Transporting | 10 | Expired |
| US4667536A | Hydrostatic/mechanical transmission system | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6817327B2 | Electrodynamic drive train | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4373359A | Hydrostatic-mechanical gear unit | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4482025A | Steered and driven axle-end assembly | Performing Operations; Transporting | 7 | Expired |
| US4616520A | Arrangement of a brake in a wheel head equipped with reducing gear | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.