BE494572A - - Google Patents
Info
- Publication number
- BE494572A BE494572A BE494572DA BE494572A BE 494572 A BE494572 A BE 494572A BE 494572D A BE494572D A BE 494572DA BE 494572 A BE494572 A BE 494572A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- prop
- chamber
- cylinder
- piston
- Prior art date
Links
- 239000007788 liquid Substances 0.000 claims description 14
- 238000013138 pruning Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/52—Extensible units located above or below standard props
- E21D15/523—Extensible units located above or below standard props with hydraulic or pneumatic control
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Safety Valves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER512A DE813542C (de) | 1949-12-08 | 1949-12-08 | Hydraulischer Grubenstempel mit einstellbarem Verformungsschutz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE494572A true BE494572A (de) |
Family
ID=7395143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE494572D BE494572A (de) | 1949-12-08 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE494572A (de) |
| DE (1) | DE813542C (de) |
| FR (1) | FR1012668A (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE971740C (de) * | 1951-04-28 | 1959-03-19 | Ringfeder Gmbh | Grubenstempel |
| DE1043251B (de) * | 1955-06-24 | 1958-11-13 | Hemscheidt Maschf Hermann | Grubenausbaustempel |
| DE1010033B (de) * | 1956-03-16 | 1957-06-13 | Eisenwerk Wanheim G M B H | Vorrichtung zum Abstreifen von Schmutz an Grubenstempeln |
| BE559110A (de) * | 1956-07-11 | |||
| NL229755A (de) * | 1957-07-20 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE621526C (de) * | 1933-02-10 | 1935-11-08 | Hugo Schramm | Aus zwei ineinanderverschiebbaren Teilen bestehender nachgiebiger Grubenstempel |
| DE640845C (de) * | 1935-05-27 | 1937-01-13 | Wilhelm Fehlemann | Nachgiebiger Grubenstempel |
-
0
- BE BE494572D patent/BE494572A/fr unknown
-
1949
- 1949-12-08 DE DER512A patent/DE813542C/de not_active Expired
-
1950
- 1950-01-27 FR FR1012668D patent/FR1012668A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1012668A (fr) | 1952-07-16 |
| DE813542C (de) | 1951-09-13 |
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