BE498390A - - Google Patents
Info
- Publication number
- BE498390A BE498390A BE498390DA BE498390A BE 498390 A BE498390 A BE 498390A BE 498390D A BE498390D A BE 498390DA BE 498390 A BE498390 A BE 498390A
- Authority
- BE
- Belgium
- Prior art keywords
- tube
- prop
- base
- nut
- ring
- Prior art date
Links
- 230000000717 retained effect Effects 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000004904 shortening Methods 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
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
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)
- Mutual Connection Of Rods And Tubes (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE498390A true BE498390A (de) |
Family
ID=141079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE498390D BE498390A (de) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE498390A (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1283023B (de) * | 1966-04-23 | 1968-11-14 | Demag Ag | Steckbolzenverriegelung |
-
0
- BE BE498390D patent/BE498390A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1283023B (de) * | 1966-04-23 | 1968-11-14 | Demag Ag | Steckbolzenverriegelung |
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