FR2138725A1 - - Google Patents
Info
- Publication number
- FR2138725A1 FR2138725A1 FR7217580A FR7217580A FR2138725A1 FR 2138725 A1 FR2138725 A1 FR 2138725A1 FR 7217580 A FR7217580 A FR 7217580A FR 7217580 A FR7217580 A FR 7217580A FR 2138725 A1 FR2138725 A1 FR 2138725A1
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/10—Anchorings for conveyors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2126014 | 1971-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2138725A1 true FR2138725A1 (forum.php) | 1973-01-05 |
Family
ID=5808898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7217580A Pending FR2138725A1 (forum.php) | 1971-05-26 | 1972-05-17 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2138725A1 (forum.php) |
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1972
- 1972-05-17 FR FR7217580A patent/FR2138725A1/fr active Pending