FR956225A - - Google Patents
Info
- Publication number
- FR956225A FR956225A FR956225DA FR956225A FR 956225 A FR956225 A FR 956225A FR 956225D A FR956225D A FR 956225DA FR 956225 A FR956225 A FR 956225A
- 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
- 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
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
- E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
-
- 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
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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)
- Structural Engineering (AREA)
- Invalid Beds And Related Equipment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE956225X | 1943-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR956225A true FR956225A (lv) | 1950-01-26 |
Family
ID=1558806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR956225D Expired FR956225A (lv) | 1943-03-22 | 1944-04-09 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE455840A (lv) |
| FR (1) | FR956225A (lv) |
-
1944
- 1944-04-09 FR FR956225D patent/FR956225A/fr not_active Expired
- 1944-05-17 BE BE455840A patent/BE455840A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE455840A (lv) | 1944-06-30 |