DE238563C - - Google Patents
Info
- Publication number
- DE238563C DE238563C DENDAT238563D DE238563DA DE238563C DE 238563 C DE238563 C DE 238563C DE NDAT238563 D DENDAT238563 D DE NDAT238563D DE 238563D A DE238563D A DE 238563DA DE 238563 C DE238563 C DE 238563C
- Authority
- DE
- Germany
- Prior art keywords
- wedge
- punch
- shaft
- convertible
- flexible
- 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
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
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)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE238563C true DE238563C (en:Method) |
Family
ID=498074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT238563D Active DE238563C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE238563C (en:Method) |
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0
- DE DENDAT238563D patent/DE238563C/de active Active
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