| Patents for E21F 3 - Cooling or drying of air (640) |
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| 09/15/1992 | US5147425 Driving and supply unit for a cooler |
| 08/13/1992 | DE4126340C1 Cold supply for underground work air conditioning - uses secondary flow division into two partial flows after passing through work-point refrigeration sets |
| 06/25/1992 | DE4040914A1 Shield support frame - has fully integrated ventilation cooling device fitting in cylindrical space in cap |
| 04/09/1992 | DE4040345C1 Support frame for mining - has cooler with air blower in support frame and canopy with chamber for cooler |
| 01/07/1992 | US5078544 Arrangement for the changeover of liquids when transported by means of a three chamber tube feeder |
| 10/16/1991 | EP0452251A1 Driving- and supply-unit for spray- or surface-cooler |
| 10/05/1991 | CA2039246A1 Driving and supply unit for a cooler |
| 08/22/1991 | DE4005426A1 Temp. conditioning system in mining installation - comprises cyclone tube cooled by cold water jacket with cold air nozzle and diaphragm |
| 08/08/1991 | DE4002331A1 Support for mine gallery roof - is made from flat and corrugated sheet steel to form passageway for cooling medium |
| 05/29/1991 | CN1051776A Salt-water-type cold-accumulating vehicle used for locally lowering temp. in mines |
| 03/26/1991 | US5001906 High pressure heat exchanger for cooling high fouling liquids |
| 02/12/1991 | US4991998 Mine cooling power recovery system |
| 11/29/1990 | DE3937153C1 Surface-type air cooler - uses battery of smooth or ribbed pipes made of hard plastics material |
| 11/15/1990 | DE3915776A1 Man-cooling system in mine - comprises rotary-jet cooler with regulator compressed-air supply pipe |
| 11/15/1990 | DE3915774A1 Mine gallery air-conditioning system - has individually-regulated rotary-jet coolers at intervals along compressed-air pipe |
| 05/10/1990 | DE3837153A1 Method and apparatus for cooling the air in mines |
| 03/01/1990 | DE3829531A1 Einrichtung zur kuehlung des kuehlmediums fuer eine vortriebsmaschine und/oder des hydraulischen druckmediums fuer hydraulikantriebe beim hydro-schildvortrieb Means for cooling the kuehlmediums for a boring machine and / or the hydraulic pressure medium for hydraulic drives in hydro-power-shield |
| 01/11/1990 | DE3839132C1 Surface cooler as air cooler |
| 11/09/1989 | DE3814789A1 Cooling arrangement for machines in underground mining |
| 02/21/1989 | US4805415 Mine cooling |
| 02/15/1989 | EP0303096A1 Surface cooler as an air cooler |
| 11/15/1988 | CA1244743A1 Method for transporting liquid substances by utilizing the potential energy of an operating fluid and liquid column machine for the implementation of the technique |
| 08/16/1988 | US4763484 Method of and apparatus for the cooling of underground mine shafts and/or machinery installed therein |
| 07/07/1988 | DE3706025C1 Apparatus for the mix-free exchange of liquids during conveyance by means of a three-chamber pipe feeder |
| 06/14/1988 | US4750333 Integrated mine cooling and water conditioning system |
| 04/28/1988 | DE3636041A1 Energy generation from deep-mining systems with decentral heat exchangers |
| 03/03/1988 | DE3626158A1 Obtaining energy from cooling circuits in deep mining installations |
| 02/18/1988 | DE3621393A1 Obtaining energy from deep mines |
| 12/17/1987 | DE3618811A1 Method and device for cooling mine ventilating machines in the longwall face |
| 10/01/1987 | DE3610628A1 Air-cooling system in an underground mining operation, in particular in a roadway or at a longwall face |
| 09/17/1987 | DE3606935A1 Pressure-volume exchanger with synchronous volume and output exchange |
| 06/11/1987 | DE3542827A1 Compact fan station |
| 01/15/1987 | DE3525134A1 Method of cooling the air at an underground working face |
| 06/05/1985 | EP0143190A2 Heat exchanger for under-ground mining and tunnelling |
| 11/06/1984 | US4480444 Deep mine cooling system |
| 10/05/1983 | EP0090792A2 Driving box for a mining machine |
| 07/19/1983 | US4394142 Water spray cooler |
| 09/22/1982 | EP0060267A1 Water spray cooler |
| 03/18/1982 | WO1982000776A1 Water spray cooler |
| 02/10/1981 | US4249462 Method and apparatus for preventing ice formation at the entrance portal of a mine |