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A fusion drilling process and device for the placement of dimensionally accurate borings, particularly those of large diameter, in rock, in which the waste melt is pressed into the surrounding rock, which is cracked due to the effect of temperature and pressure, and in which a borehole lining is pro

A fusion drilling process and device for the placement of dimensionally accurate borings, particularly those of large diameter, in rock, in which the waste melt is pressed into the surrounding rock, which is cracked due to the effect of temperature and pressure, and in which a borehole lining is produced by solidifying melting during boring, with a melt containing metal supplied through pipeline elements as a boring medium to the base of the borehole to be removed through melting. For this purpose a melt made of magnetic metal is preferably used.

대표청구항 ▼

A fusion drilling process and device for the placement of dimensionally accurate borings, particularly those of large diameter, in rock, in which the waste melt is pressed into the surrounding rock, which is cracked due to the effect of temperature and pressure, and in which a borehole lining is pro

A fusion drilling process and device for the placement of dimensionally accurate borings, particularly those of large diameter, in rock, in which the waste melt is pressed into the surrounding rock, which is cracked due to the effect of temperature and pressure, and in which a borehole lining is produced by solidifying melting during boring, with a melt containing metal supplied through pipeline elements as a boring medium to the base of the borehole to be removed through melting. For this purpose a melt made of magnetic metal is preferably used. as claimed in claim 1, characterized in that the delivery rates of the pressure and suction pump unit (30, 31) are essentially equal. 6. Microdialysis system as claimed in claim 1, characterized in that the delivery rate of the pressure pump unit (30) is larger by a predetermined amount than the delivery rate of the suction pump unit (31). 7. Microdialysis system as claimed in claim 1, characterized in that the delivery rate of the pressure and suction pump unit (30, 31) is less than 1 μl per minute. 8. Microdialysis system as claimed in claim 1, characterized in that the suction side of the pressure pump unit (30) is connected to a reservoir (34) for perfusion fluid. 9. Microdialysis system as claimed in claim 1, characterized in that the pressure side of the suction pump unit (31) is connected to a flow chamber (25) of the sensor cell (14) which terminates in a collecting vessel (54). 10. Microdialysis system as claimed in claim 1, characterized by a reagent pump unit (44) for metering a reagent solution into the perfusion fluid upstream of the sensor cell. 11. Microdialysis system as claimed in claim 10, characterized in that the pressure side of the reagent pump unit (44) and of the suction pump unit (31) are connected to a connecting duct (42) leading to the sensor cell (14). 12. Microdialysis system as claimed in claim 10, characterized in that the pressure pump unit (30), the suction pump unit (31) and the reagent pump unit (44) each comprise a flexible pump tube of a multichannel peristaltic pump actuated by a common rotary piston (50). 13. Microdialysis system as claimed in claim 1, characterized in that the delivery rate of the pressure and suction pump unit (30, 31) is less than 0.1 μl per minute. 14. Microdialysis system as claimed in claim 1, characterized in that the sensor cell is formed for the detection of glucose in the perfusion fluid. 15. Microdialysis system as claimed in one of the claims 1 to 12, characterized in that the microdialysis probe (12) comprises a double-lumen catheter (22, 26) which has in the area of the catheter's distal end the micropore dialysis membrane (28) formed from hollow fibres the outside of which is formed to be embedded in the tissue (10) and the inside of which is supplied with perfusion fluid. 16. A microdialysis system comprising a microdialysis probe formed to be inserted in organic tissue to collect fluid from the tissue, the probe defining a probe channel having an inlet and an outlet and including a dialysis membrane, the dialysis membrane being formed to permit diffusion of fluid into the channel and to separate the probe channel from the surrounding tissue, a sensor cell, and a transport device formed to convey the fluid from the microdialysis probe to the sensor cell, the transport device including a pressure pump unit in communication with the inlet and a suction pump unit having a pressure side and a suction side and the suction side is in communication with the outlet, the pressure and suction pump units being formed to operate simultaneously with one another. 17. The system of claim 16 wherein the pressure pump unit includes a pressure side in communication with the inlet. 18. The system of claim 16 wherein the pressure side is in communication with the sensor cell. 19. The system of claim 17 wherein the sensor cell includes a flow chamber that terminates in a collecting vessel and the pressure side of the suction pump unit is in communication with the flow chamber. 20. The system of claim 16 further comprising a reservoir for perfusion fluid and wherein the pressure pump unit includes a suction side in communication with the reservoir. 21. The system of claim 16 wherein the pressure pump unit and the suction pump unit are each coupled via a non-branching duct to the probe channel. 22. The system of claim 21 wherein the duct is a flexible tube. 23. The system of claim 16 wherein pressure pump unit and the suction pump unit each include a delivery rate and