BE419821A - - Google Patents
Info
- Publication number
- BE419821A BE419821A BE419821DA BE419821A BE 419821 A BE419821 A BE 419821A BE 419821D A BE419821D A BE 419821DA BE 419821 A BE419821 A BE 419821A
- Authority
- BE
- Belgium
- Prior art keywords
- prop
- stay
- cam
- metal
- wedges
- Prior art date
Links
- 239000002184 metal Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 description 2
- 230000000284 resting effect Effects 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
-
- 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
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)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE419821A true BE419821A (enrdf_load_stackoverflow) |
Family
ID=82027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE419821D BE419821A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE419821A (enrdf_load_stackoverflow) |
-
0
- BE BE419821D patent/BE419821A/fr unknown
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