DE141892C - - Google Patents
Info
- Publication number
- DE141892C DE141892C DENDAT141892D DE141892DA DE141892C DE 141892 C DE141892 C DE 141892C DE NDAT141892 D DENDAT141892 D DE NDAT141892D DE 141892D A DE141892D A DE 141892DA DE 141892 C DE141892 C DE 141892C
- Authority
- DE
- Germany
- Prior art keywords
- free
- valve
- fall
- hollow body
- drilling
- 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
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D1/00—Sinking shafts
- E21D1/03—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws
- E21D1/06—Sinking shafts mechanically, e.g. by loading shovels or loading buckets, scraping devices, conveying screws with shaft-boring cutters
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (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 |
|---|---|
| DE141892C true DE141892C (enExample) |
Family
ID=409481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT141892D Active DE141892C (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE141892C (enExample) |
-
0
- DE DENDAT141892D patent/DE141892C/de active Active
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