DE235004C - - Google Patents
Info
- Publication number
- DE235004C DE235004C DENDAT235004D DE235004DA DE235004C DE 235004 C DE235004 C DE 235004C DE NDAT235004 D DENDAT235004 D DE NDAT235004D DE 235004D A DE235004D A DE 235004DA DE 235004 C DE235004 C DE 235004C
- Authority
- DE
- Germany
- Prior art keywords
- punch
- pit
- base
- flap
- rotatably suspended
- 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
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 210000002105 tongue Anatomy 0.000 description 5
- 239000004566 building material Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 3
- -1 for example earth Substances 0.000 description 2
- 241000182341 Cubitermes group Species 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000758 substrate Substances 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
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
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)
- Working Measures On Existing Buildindgs (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE235004C true DE235004C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=494825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT235004D Active DE235004C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE235004C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236421A1 (de) * | 1982-10-01 | 1984-05-17 | Ruhrkohle Ag, 4300 Essen | Nachgiebiger streckenausbaustempel |
-
0
- DE DENDAT235004D patent/DE235004C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3236421A1 (de) * | 1982-10-01 | 1984-05-17 | Ruhrkohle Ag, 4300 Essen | Nachgiebiger streckenausbaustempel |
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