DE252262C - - Google Patents
Info
- Publication number
- DE252262C DE252262C DENDAT252262D DE252262DA DE252262C DE 252262 C DE252262 C DE 252262C DE NDAT252262 D DENDAT252262 D DE NDAT252262D DE 252262D A DE252262D A DE 252262DA DE 252262 C DE252262 C DE 252262C
- Authority
- DE
- Germany
- Prior art keywords
- filler
- loosen
- closure
- serving
- filling
- 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
- 239000000945 filler Substances 0.000 claims 2
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)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
Hierzu 1 Blatt Zeichnungen.
BERLIN. GEDRUCKT IN DER REICHSDIiUCKEHKI,
Claims (1)
- Patent-Anspruch :Mehrteiliger Grubenstempel mit einem die Teile gegeneinander abstützenden Füllstoff, dadurch gekennzeichnet, daß die zum Lösen und Entfernen des Füllstoffes dienende Schnecke (e) in Ruhestellung gleichzeitig den Verschluß der Austrittsöffnung (d) für die Füllung bildet.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE252262C true DE252262C (de) |
Family
ID=510633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT252262D Active DE252262C (de) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE252262C (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1108157B (de) * | 1957-02-11 | 1961-06-08 | Hermann Schwarz K G | Druckmittelraum fuer Elemente des Grubenausbaus |
-
0
- DE DENDAT252262D patent/DE252262C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1108157B (de) * | 1957-02-11 | 1961-06-08 | Hermann Schwarz K G | Druckmittelraum fuer Elemente des Grubenausbaus |
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