DE222963C - - Google Patents
Info
- Publication number
- DE222963C DE222963C DENDAT222963D DE222963DA DE222963C DE 222963 C DE222963 C DE 222963C DE NDAT222963 D DENDAT222963 D DE NDAT222963D DE 222963D A DE222963D A DE 222963DA DE 222963 C DE222963 C DE 222963C
- Authority
- DE
- Germany
- Prior art keywords
- funnel
- rope
- sand
- passed
- pit
- 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
- E21D15/16—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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE222963C true DE222963C (enExample) |
Family
ID=483816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT222963D Active DE222963C (enExample) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE222963C (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2709560A (en) * | 1949-03-25 | 1955-05-31 | Resk Michel | Camera support |
-
0
- DE DENDAT222963D patent/DE222963C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2709560A (en) * | 1949-03-25 | 1955-05-31 | Resk Michel | Camera support |
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