DE152291C - - Google Patents
Info
- Publication number
- DE152291C DE152291C DENDAT152291D DE152291DA DE152291C DE 152291 C DE152291 C DE 152291C DE NDAT152291 D DENDAT152291 D DE NDAT152291D DE 152291D A DE152291D A DE 152291DA DE 152291 C DE152291 C DE 152291C
- Authority
- DE
- Germany
- Prior art keywords
- wedge
- frame
- cheeks
- driver
- rod
- 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
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
- E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit
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 |
|---|---|
| DE152291C true DE152291C (cs) |
Family
ID=419039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT152291D Active DE152291C (cs) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE152291C (cs) |
-
0
- DE DENDAT152291D patent/DE152291C/de active Active
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