BE555379A - - Google Patents
Info
- Publication number
- BE555379A BE555379A BE555379DA BE555379A BE 555379 A BE555379 A BE 555379A BE 555379D A BE555379D A BE 555379DA BE 555379 A BE555379 A BE 555379A
- Authority
- BE
- Belgium
- Prior art keywords
- roller
- prop
- upright
- key
- metal
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 238000002955 isolation Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21D15/34—Telescopic props with parts held relatively to each other by friction or gripping by axially- moving balls, rollers, or the like
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)
- Gates (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE555379A true BE555379A (de) |
Family
ID=179532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE555379D BE555379A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE555379A (de) |
-
0
- BE BE555379D patent/BE555379A/fr unknown
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