BE410248A - - Google Patents
Info
- Publication number
- BE410248A BE410248A BE410248DA BE410248A BE 410248 A BE410248 A BE 410248A BE 410248D A BE410248D A BE 410248DA BE 410248 A BE410248 A BE 410248A
- Authority
- BE
- Belgium
- Prior art keywords
- emi
- sheath
- aforesaid
- wedge
- prop
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000013138 pruning Methods 0.000 claims 1
- 238000004904 shortening Methods 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process 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
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction
-
- 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)
- Floor Finish (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE410248A true BE410248A (de) |
Family
ID=74477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE410248D BE410248A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE410248A (de) |
-
0
- BE BE410248D patent/BE410248A/fr unknown
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