BE485664A - - Google Patents
Info
- Publication number
- BE485664A BE485664A BE485664DA BE485664A BE 485664 A BE485664 A BE 485664A BE 485664D A BE485664D A BE 485664DA BE 485664 A BE485664 A BE 485664A
- Authority
- BE
- Belgium
- Prior art keywords
- punch
- barrel
- prop
- friction
- wedge
- Prior art date
Links
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
- E21D15/38—Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
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)
- Clamps And Clips (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE485664A true BE485664A (https=) |
Family
ID=131521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE485664D BE485664A (https=) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE485664A (https=) |
-
0
- BE BE485664D patent/BE485664A/fr unknown
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