JPS5347323B1 - - Google Patents
Info
- Publication number
- JPS5347323B1 JPS5347323B1 JP5891571A JP5891571A JPS5347323B1 JP S5347323 B1 JPS5347323 B1 JP S5347323B1 JP 5891571 A JP5891571 A JP 5891571A JP 5891571 A JP5891571 A JP 5891571A JP S5347323 B1 JPS5347323 B1 JP S5347323B1
- Authority
- JP
- Japan
- 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
- 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
- E21D23/26—Hydraulic or pneumatic control
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)
- Control Of Presses (AREA)
- Lining And Supports For Tunnels (AREA)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702038663 DE2038663C3 (de) | 1970-08-04 | 1970-08-04 | Hydraulische Steuervorrichtung für rückbare Ausbaueinheiten in Form von Rahmen, Böcken u.dgl. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5347323B1 true JPS5347323B1 (https=) | 1978-12-20 |
Family
ID=5778823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5891571A Pending JPS5347323B1 (https=) | 1970-08-04 | 1971-08-04 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5347323B1 (https=) |
| DE (1) | DE2038663C3 (https=) |
| FR (1) | FR2100097A5 (https=) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1032021A (en) * | 1964-01-14 | 1966-06-08 | Dowty Mining Equipment Ltd | Advanceable roof support assembly |
| US3440501A (en) * | 1967-02-02 | 1969-04-22 | Gen Electric | Double-triggering semiconductor controlled rectifier |
-
1970
- 1970-08-04 DE DE19702038663 patent/DE2038663C3/de not_active Expired
-
1971
- 1971-07-01 FR FR7124064A patent/FR2100097A5/fr not_active Expired
- 1971-08-04 JP JP5891571A patent/JPS5347323B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2038663B2 (de) | 1978-08-10 |
| FR2100097A5 (https=) | 1972-03-17 |
| DE2038663C3 (de) | 1984-05-03 |
| DE2038663A1 (de) | 1972-02-10 |