BE452659A - - Google Patents
Info
- Publication number
- BE452659A BE452659A BE452659DA BE452659A BE 452659 A BE452659 A BE 452659A BE 452659D A BE452659D A BE 452659DA BE 452659 A BE452659 A BE 452659A
- Authority
- BE
- Belgium
- Prior art keywords
- collar
- irons
- wings
- prop
- outer column
- Prior art date
Links
- 235000000396 iron Nutrition 0.000 description 12
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241001310494 Ammodytes marinus Species 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance 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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
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)
- Adornments (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE452659A true BE452659A (https=) |
Family
ID=107228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE452659D BE452659A (https=) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE452659A (https=) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE946971C (de) * | 1946-04-25 | 1956-08-09 | Hermann Schwarz Kommanditgesel | Zweiteiliger metallener Grubenstempel |
-
0
- BE BE452659D patent/BE452659A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE946971C (de) * | 1946-04-25 | 1956-08-09 | Hermann Schwarz Kommanditgesel | Zweiteiliger metallener Grubenstempel |
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