DE256030C - - Google Patents
Info
- Publication number
- DE256030C DE256030C DENDAT256030D DE256030DA DE256030C DE 256030 C DE256030 C DE 256030C DE NDAT256030 D DENDAT256030 D DE NDAT256030D DE 256030D A DE256030D A DE 256030DA DE 256030 C DE256030 C DE 256030C
- Authority
- DE
- Germany
- Prior art keywords
- wedges
- machine
- piston
- pickaxe
- scissors
- 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
- 239000003245 coal Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 description 3
- 241000131971 Bradyrhizobiaceae Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/02—Other methods or devices for dislodging with or without loading by wedges
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE256030C true DE256030C (enrdf_load_stackoverflow) |
Family
ID=514084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT256030D Active DE256030C (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE256030C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT256030D patent/DE256030C/de active Active
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