DE176934C - - Google Patents
Info
- Publication number
- DE176934C DE176934C DENDAT176934D DE176934DA DE176934C DE 176934 C DE176934 C DE 176934C DE NDAT176934 D DENDAT176934 D DE NDAT176934D DE 176934D A DE176934D A DE 176934DA DE 176934 C DE176934 C DE 176934C
- Authority
- DE
- Germany
- Prior art keywords
- pit
- spring
- punch
- hanging wall
- sleeve
- 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.)
- Active
Links
- 230000004913 activation Effects 0.000 claims 1
- 229910001296 Malleable iron Inorganic materials 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
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
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)
- Springs (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Breakers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE176934C true DE176934C (cs) |
Family
ID=441447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT176934D Active DE176934C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE176934C (cs) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE926722C (de) * | 1948-10-02 | 1955-04-21 | Ringfeder Gmbh | Grubenstempel aus Stahl |
-
0
- DE DENDAT176934D patent/DE176934C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE926722C (de) * | 1948-10-02 | 1955-04-21 | Ringfeder Gmbh | Grubenstempel aus Stahl |
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