Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
Methods of mining or quarrying; Open-pit mining; Layouts therefor (methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells E 21 B 43/00)
41
/
00
Methods of underground or surface mining (E 21 C 45/00 takes precedence); Layouts therefor (for peat E 21 C 49/00) [5]
41
/
16
•
Methods of underground mining (winning machines therefor E 21 C 25/00 to E 21 C 39/00); Layouts therefor [5]
41
/
18
•
•
for brown or hard coal [5]
41
/
20
•
•
for rock salt or potash salt [5]
41
/
22
•
•
for ores, e.g. mining placers [5]
41
/
24
•
•
for oil-bearing deposits [5]
41
/
26
•
Methods of surface mining (machines for obtaining, or the removal of, materials in open-pit mines E 21 C 47/00); Layouts therefor [5]
41
/
28
•
•
for brown or hard coal [5]
41
/
30
•
•
for ores, e.g. mining placers [5]
41
/
32
•
Reclamation of surface-mined areas (machines or methods for treating or working soil for agricultural purposes A 01 B 77/00, A 01 B 79/00; machines for back-filling E 02 F 5/22) [5]
45
/
00
Methods of hydraulic mining; Hydraulic monitors (E 21 C 25/60 takes precedence) [5]
45
/
02
•
Means for generating pulsating fluid jets [5]
45
/
04
•
•
by use of highly pressurised liquid [5]
45
/
06
•
•
by use of compressed gases [5]
45
/
08
•
Automatic or remote control of hydraulic monitors [5]
47
/
00
Machines for obtaining, or the removal of, materials in open-pit mines (obtaining peat E 21 C 49/00)
47
/
02
•
for coal, brown coal, or the like (dredgers or soil-shifting machines in general E 02 F) [3]
47
/
04
•
•
Conveyer bridges used in co-operation with the winning apparatus [3]
47
/
06
•
•
Cableway conveyers used in co-operation with the winning apparatus (underground hauling E 21 F 13/00)
47
/
08
•
•
Devices for cutting-out partings, e.g. layers of sand between seams of coal
47
/
10
•
for quarrying stone, sand, gravel, or clay
49
/
00
Obtaining peat; Machines therefor (treating peat C 10 F)
49
/
02
•
by excavating
49
/
04
•
by digging in the form of peat sods
50
/
00
Obtaining minerals from underwater, not otherwise provided for (suction dredgers or component parts thereof E 02 F 3/88
; equipment for conveying or separating excavated material E 02 F 7/00; dippers G 01 N 1/12) [5]
50
/
02
•
dependent on the ship movements (vessels or floating structures adapted for special purposes B 63 B 35/00) [5]
51
/
00
Apparatus for, or methods of, winning materials from extraterrestrial sources (cosmonautics B 64 G) [2]
