Michael Dettmers
26Patents
5h-index
20Co-inventors
69Inventor score
Filing activity: Mar 22, 1978 → Dec 1, 2006
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5159872A | Valve units for use in hydraulic control systems of mining equipment | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6073654A | Hydraulically trippable check valve for underground mine support hydraulics | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4327628A | Hydraulic roof support control system | Fixed Constructions | 8 | Expired |
| US4702148A | Control of the actuation of hydraulic consumers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4169689A | Tensioning a longwall mineral mining installation | Fixed Constructions | 7 | Expired |
| US5060556A | Arrangement for emergency operation of hydraulic appliance in an electro-hydraulically controlled mineral mining installation | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4247226A | Hydraulic conduit systems for mine installations | Fixed Constructions | 4 | Expired |
| US4391181A | Hydraulic control systems for mining apparatus | Fixed Constructions | 4 | Expired |
| US4613257A | Hydraulic control arrangement | Fixed Constructions | 4 | Expired |
| US5157947A | Balanced hydraulic valve devices | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6779776B2 | Intrinsically safe electrically magnetically operated hydraulic valve | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4422807A | Mine roof supports | Fixed Constructions | 3 | Expired |
| US4537221A | Hydraulic control devices for use with mining apparatus | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4572709A | Control apparatus | Emerging Cross-Sectional Technologies | 3 | Expired |
| US7428861B2 | Valve for hydraulic props of shield-type support frames, and shield-type support frame | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4440522A | Hydraulic control arrangement for a roof support unit of a mineral mining installation | Fixed Constructions | 2 | Expired |
| US6398181B1 | Valve arrangement | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US4534681A | Mine roof supports | Fixed Constructions | 2 | Expired |
| US6609539B2 | Hydraulically operated directional control valve | Emerging Cross-Sectional Technologies | 2 | Expired |
| US7237983B2 | Hydraulic shield support | Fixed Constructions | 2 | Expired |
| US6616122B2 | Electromagnet switching device | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4907779A | Electro-magnetically operated valve devices | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US5427142A | Valve device for use in electro-hydraulic control systems of mining installations | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7489216B2 | Housing cover for switching solenoid housing | Electricity | 0 | Active |
| US6481933B1 | Powered support frame for large seam thicknesses with controlled gap sealing plates | Fixed Constructions | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.