BE434994A - - Google Patents
Info
- Publication number
- BE434994A BE434994A BE434994DA BE434994A BE 434994 A BE434994 A BE 434994A BE 434994D A BE434994D A BE 434994DA BE 434994 A BE434994 A BE 434994A
- Authority
- BE
- Belgium
- Prior art keywords
- unlocking
- trigger
- wedges
- prop
- trigger device
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 210000000056 organ Anatomy 0.000 description 3
- 210000003323 beak Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000001960 triggered 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
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)
- Orthopedics, Nursing, And Contraception (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE434994A true BE434994A (cs) |
Family
ID=93995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE434994D BE434994A (cs) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE434994A (cs) |
-
0
- BE BE434994D patent/BE434994A/fr unknown
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