DE263882C - - Google Patents
Info
- Publication number
- DE263882C DE263882C DENDAT263882D DE263882DA DE263882C DE 263882 C DE263882 C DE 263882C DE NDAT263882 D DENDAT263882 D DE NDAT263882D DE 263882D A DE263882D A DE 263882DA DE 263882 C DE263882 C DE 263882C
- Authority
- DE
- Germany
- Prior art keywords
- hollow cylinder
- saw
- shaft
- coal
- cylinder saw
- 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
- 238000005553 drilling Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/02—Lining predominantly with wood
- E21D11/03—Lining predominantly with wood using timber- setting machines
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural 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 |
|---|---|
| DE263882C true DE263882C (pt) |
Family
ID=521243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT263882D Active DE263882C (pt) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE263882C (pt) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115911A (en) * | 1962-09-10 | 1963-12-31 | Robert D Van Auken | Guide apparatus for hole saws |
-
0
- DE DENDAT263882D patent/DE263882C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3115911A (en) * | 1962-09-10 | 1963-12-31 | Robert D Van Auken | Guide apparatus for hole saws |
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