BE484433A - - Google Patents
Info
- Publication number
- BE484433A BE484433A BE484433DA BE484433A BE 484433 A BE484433 A BE 484433A BE 484433D A BE484433D A BE 484433DA BE 484433 A BE484433 A BE 484433A
- Authority
- BE
- Belgium
- Prior art keywords
- prop
- perforations
- wings
- section
- metal
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 8
- 238000005065 mining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 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
- E21D15/40—Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted
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 |
|---|---|
| BE484433A true BE484433A (en, 2012) |
Family
ID=130590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE484433D BE484433A (en, 2012) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE484433A (en, 2012) |
-
0
- BE BE484433D patent/BE484433A/fr unknown
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