| 4998777 |
Coal-cutting machine having horizontally swivellable jib boom and vertically swivellable loading means |
Arnulf Kissich, Werner Stecher, Helmut Habenicht, Wilhelm Papst, Bernhard Pleterski |
1991-03-12 |
| 4721340 |
Process for controlling the movement of an universally swivellable cutting arm as well as control device for performing this process |
Herwig Wrulich, Alfred Zitz |
1988-01-26 |
| 4711502 |
Apparatus for cutting excavations having a substantially planar face |
Franz Barnthaler, Ferdinand Bedenk, Alfred Zitz |
1987-12-08 |
| 4664449 |
Drift advancing or mining machine |
Franz Barnthaler, Ferdinand Bedenk, Alfred Zitz |
1987-05-12 |
| 4662685 |
Device for sealing a drift cross section driven by means of a cutting machine |
Franz Barnthaler, Ferdinand Bedenk, Alfred Zitz |
1987-05-05 |
| 4591209 |
Protecting device for partial-cut cutting machines |
Bernhard Droscher, Herwig Wrulich, Alfred Zitz |
1986-05-27 |
| 4585275 |
Process for spraying the bits and/or the facing with pressurized liquid as well as apparatus for performing this process |
Herwig Wrulich, Alfred Zitz, Franz Schoffmann |
1986-04-29 |
| 4555143 |
Apparatus for cutting rock |
Herwig Wrulich, Gottfried Siebenhofer, Wilfried Maier |
1985-11-26 |
| 4542942 |
Bit holder equipped with a spraying device |
Alfred Zitz, Herwig Wrulich, Wilfried Maier |
1985-09-24 |
| 4537447 |
Device for cooling the bits of cutting machine |
Alfred Zitz, Herwig Wrulich |
1985-08-27 |
| 4506932 |
Device for cooling the bits of a cutting machine |
Alfred Zitz, Herwig Wrulich |
1985-03-26 |
| 4456306 |
Cooling system for cooling the bits of a cutting machine |
Herwig Wrulich, Alfred Zitz, Siegmar Gekle |
1984-06-26 |
| 4412700 |
System for monitoring the movement of a cutting tool of a tunnel-driving machine relative to a desired profile |
Alfred Zitz, Erich Droscher |
1983-11-01 |
| 4379594 |
Process for sinking of shafts |
Alfred Zitz, Herwig Wrulich, Arnulf Kissich |
1983-04-12 |
| 4368918 |
Process and apparatus for controlling the water supply to the cutting head of a cutting machine |
Erich Droscher, Herwig Wrulich, Alfred Zitz |
1983-01-18 |
| 4289357 |
Hollow cutting head |
Rudolf Hintermann, Alfred Zitz, Herwig Wrulich |
1981-09-15 |
| 4285549 |
Assembly for cooling the teeth of the cutting head and the rock face |
Alfred Zitz, Herwig Wrulich |
1981-08-25 |
| 4247150 |
Bit arrangement for a cutting tool |
Herwig Wrulich, Alfred Zitz |
1981-01-27 |
| 4236627 |
Cutting machine |
Siegfried Sigott, Peter Kogler, Alfred Zitz |
1980-12-02 |
| 4225144 |
Device for sealing the gap between component parts rotatable relative to each other |
Alfred Zitz, Peter Kogler |
1980-09-30 |