ZA703511B - Improvements in or relating to control systems for self-advancing mine roof supports - Google Patents
Improvements in or relating to control systems for self-advancing mine roof supportsInfo
- Publication number
- ZA703511B ZA703511B ZA703511A ZA703511A ZA703511B ZA 703511 B ZA703511 B ZA 703511B ZA 703511 A ZA703511 A ZA 703511A ZA 703511 A ZA703511 A ZA 703511A ZA 703511 B ZA703511 B ZA 703511B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- self
- control systems
- mine roof
- roof supports
- Prior art date
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)
- Mechanically-Actuated Valves (AREA)
- Lining And Supports For Tunnels (AREA)
- Multiple-Way Valves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2687269 | 1969-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA703511B true ZA703511B (en) | 1971-01-27 |
Family
ID=10250546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA703511A ZA703511B (en) | 1969-05-28 | 1970-05-25 | Improvements in or relating to control systems for self-advancing mine roof supports |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3661056A (fr) |
| JP (1) | JPS5126362B1 (fr) |
| CA (1) | CA919925A (fr) |
| FR (1) | FR2048819A5 (fr) |
| GB (1) | GB1295079A (fr) |
| PL (1) | PL72769B1 (fr) |
| ZA (1) | ZA703511B (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2128878A (en) * | 1935-03-22 | 1938-08-30 | Trico Products Corp | Windshield cleaner control mechanism |
| US2202422A (en) * | 1937-08-02 | 1940-05-28 | Addison C Hoof | Remote control for governors |
| DE1201286B (de) * | 1965-01-21 | 1965-09-23 | Gewerk Eisenhuette Westfalia | Rueckbarer hydraulischer Strebausbau |
| US3289625A (en) * | 1965-04-21 | 1966-12-06 | Stanley King N | Boat hull drain assembly |
| JPS441196Y1 (fr) * | 1965-06-01 | 1969-01-17 | ||
| US3405567A (en) * | 1967-03-01 | 1968-10-15 | Morse Controls Inc | Selective vernier control |
-
1969
- 1969-05-28 GB GB2687269A patent/GB1295079A/en not_active Expired
-
1970
- 1970-05-22 US US39766A patent/US3661056A/en not_active Expired - Lifetime
- 1970-05-25 ZA ZA703511A patent/ZA703511B/xx unknown
- 1970-05-26 FR FR7019139A patent/FR2048819A5/fr not_active Expired
- 1970-05-26 CA CA083718A patent/CA919925A/en not_active Expired
- 1970-05-27 PL PL1970140921A patent/PL72769B1/pl unknown
- 1970-05-28 JP JP45045248A patent/JPS5126362B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| PL72769B1 (fr) | 1974-08-30 |
| JPS5126362B1 (fr) | 1976-08-06 |
| US3661056A (en) | 1972-05-09 |
| CA919925A (en) | 1973-01-30 |
| GB1295079A (fr) | 1972-11-01 |
| FR2048819A5 (fr) | 1971-03-19 |
| DE2025293A1 (fr) | 1972-03-09 |
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