FR958578A - - Google Patents
Info
- Publication number
- FR958578A FR958578A FR958578DA FR958578A FR 958578 A FR958578 A FR 958578A FR 958578D A FR958578D A FR 958578DA FR 958578 A FR958578 A FR 958578A
- Authority
- FR
- France
- 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.)
- Expired
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
- E21D15/38—Telescopic props with parts held relatively to each other by friction or gripping with longitudinally-divided upper or lower prop parts, e.g. interfitting laminations
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 |
|---|---|
| FR958578A true FR958578A (de) | 1950-03-15 |
Family
ID=1560672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR958578D Expired FR958578A (de) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR958578A (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972045C (de) * | 1951-07-10 | 1959-05-21 | Ernst Biefang | Waelzkoerper-Klemmverbindung, insbesondere fuer Grubenstempel |
| US2928643A (en) * | 1953-02-21 | 1960-03-15 | Bellmann Eugen | Prop-type supporting device |
| US2938699A (en) * | 1953-01-15 | 1960-05-31 | Bellmann Emma Elfriede | Prop-type supporting devices |
-
0
- FR FR958578D patent/FR958578A/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972045C (de) * | 1951-07-10 | 1959-05-21 | Ernst Biefang | Waelzkoerper-Klemmverbindung, insbesondere fuer Grubenstempel |
| US2938699A (en) * | 1953-01-15 | 1960-05-31 | Bellmann Emma Elfriede | Prop-type supporting devices |
| US2928643A (en) * | 1953-02-21 | 1960-03-15 | Bellmann Eugen | Prop-type supporting device |