Herbert Ampferer
30Patents
13h-index
18Co-inventors
74Inventor score
Filing activity: Sep 27, 1982 → Oct 7, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5136993A | Internal-combustion engine oil guiding housing | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4938314A | Plastic oil pan | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5138985A | Arrangement for changing the valve timing of an internal-combustion engine | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US5080057A | Cylinder head of an internal-combustion engine | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US5063895A | Oil pump drive arrangement for a piston internal-combustion engine and method of making same | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4693216A | Crankshaft bearings for internal-combustion engines | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5678884A | Air guide device with air intake openings | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4493295A | Internal combustion engine, especially for motor vehicles | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4759317A | Multi-cylinder internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US5014655A | Camshaft drive of a multi-cylinder V-engine | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4805566A | Arrangement for influencing the control times of valves | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4898125A | Cylinder head cover with suction pipe arrangement for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US4709670A | Fastening arrangement of a cover hood at a cylinder head | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4823748A | Actuating arrangement | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4883031A | Internal combustion engine | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4657043A | Oil pressure regulating valve | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5711614A | Crankshaft bearing of a multicylinder internal combustion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5273007A | Arrangement for distributing oil in a camshaft | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4829942A | Intake system for a multi-cylinder internal-combustion engine | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4559783A | Turbocharged internal combustion engine with adjustable length pipe sections | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5220889A | Intake system for a multi-cylinder internal-combustion engine | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4974569A | Cylinder block and crankcase | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5094072A | Exhaust system of a reciprocating piston engine | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4828536A | Chain tensioner | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US4785772A | Crankshaft of a ferro-metallic material for reciprocating piston internal combustion engines | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.