Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7740421 | Arrangement for the admission of pressurized water to spray systems | Franz-Heinrich Suilmann, Michael Dettmers, Sebastian Mundry | 2010-06-22 |
| 7237983 | Hydraulic shield support | Franz-Heinrich Suilmann, Friedrich Wilhelm Dannehl, Michael Dettmers | 2007-07-03 |
| 7127885 | Assembly for use in underground mining | Sebastian Mundry, Jens Titschert, Franz-Heinrich Suilmann, Patrick Hantke, Torsten Boldt +2 more | 2006-10-31 |
| 6991407 | Lift cylinder assembly | Friedrich Wilhelm Dannehl, Holger Behnert | 2006-01-31 |
| 6837269 | Electrohydraulic control device | Franz-Heinrich Suilmann | 2005-01-04 |
| 6615705 | Hydraulic cylinder | Friedrich Wilhelm Dannehl | 2003-09-09 |
| 6609539 | Hydraulically operated directional control valve | Michael Dettmers, Wolfgang Kobow | 2003-08-26 |
| 6398181 | Valve arrangement | Michael Dettmers, Wolfgang Kobow | 2002-06-04 |
| 6209440 | Hydraulic double telescopic prop | Friedrich Wilhelm Dannehl | 2001-04-03 |
| 6098653 | Electrohydraulic control valve | Wolfgang Kobow | 2000-08-08 |
| 6073654 | Hydraulically trippable check valve for underground mine support hydraulics | Michael Dettmers, Wolfgang Kobow | 2000-06-13 |
| 5401123 | Control device for mine-roof support | Wolfgang Kobow | 1995-03-28 |
| 5275469 | Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter | Guy Geuns | 1994-01-04 |
| 5181451 | Control system for longwall face support frames | Guy Geuns | 1993-01-26 |
| 4852852 | Hydraulic valve actuating device | Karl Krieger, Wolfgang Kobow | 1989-08-01 |
| 4782736 | Pressure-control valve | Karl Krieger | 1988-11-08 |
| 4780638 | Method and system for the production of electrical energy by means of a pressure medium | Guy Geuns, Karl Krieger, by Hildegard Krieger, legal representative | 1988-10-25 |
| 4769538 | Piston stroke digital determination means | Karl Krieger | 1988-09-06 |
| 4757835 | Change-over valve for hydraulic walking mine-roof supports | Wolfgang Kobow, Karl Krieger | 1988-07-19 |
| 4694730 | Prop control valve | Karl Krieger | 1987-09-22 |
| 4676698 | Hydraulic valve control apparatus | Karl Krieger | 1987-06-30 |
| 4660595 | Pressure-limiting valve | Willi Kuster, Karl Krieger | 1987-04-28 |
| 4597557 | Hydraulically-controlled non-return valve | Karl Krieger, Jochem Hartleb | 1986-07-01 |
| 4552172 | Pressure-limiting hydraulic valve | Karl Krieger | 1985-11-12 |
| 4465408 | Mine-roof support control mechanism | Karl Krieger, Gunter Kuschke | 1984-08-14 |