DE1302953B - - Google Patents
Info
- Publication number
- DE1302953B DE1302953B DENDAT1302953D DE1302953DA DE1302953B DE 1302953 B DE1302953 B DE 1302953B DE NDAT1302953 D DENDAT1302953 D DE NDAT1302953D DE 1302953D A DE1302953D A DE 1302953DA DE 1302953 B DE1302953 B DE 1302953B
- Authority
- DE
- Germany
- Prior art keywords
- spring
- support
- support spring
- punch
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0418—Positioning devices and stabilizing means for the props
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Springs (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1302953B true DE1302953B (enExample) | 1971-01-14 |
Family
ID=621776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1302953D Pending DE1302953B (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1302953B (enExample) |
-
0
- DE DENDAT1302953D patent/DE1302953B/de active Pending
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