FR2185749A1 - - Google Patents
Info
- Publication number
- FR2185749A1 FR2185749A1 FR7319004A FR7319004A FR2185749A1 FR 2185749 A1 FR2185749 A1 FR 2185749A1 FR 7319004 A FR7319004 A FR 7319004A FR 7319004 A FR7319004 A FR 7319004A FR 2185749 A1 FR2185749 A1 FR 2185749A1
- 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.)
- Granted
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)
- Fluid-Pressure Circuits (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722225196 DE2225196B2 (de) | 1972-05-24 | 1972-05-24 | Steuergerät für den schreitenden Grubenausbau |
DE19722263481 DE2263481C2 (de) | 1972-12-27 | 1972-12-27 | Steuergerät für den schreitenden Grubenausbau |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2185749A1 true FR2185749A1 (xx) | 1974-01-04 |
FR2185749B3 FR2185749B3 (xx) | 1976-05-14 |
Family
ID=25763306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7319004A Expired FR2185749B3 (xx) | 1972-05-24 | 1973-05-24 |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2185749B3 (xx) |
GB (1) | GB1433631A (xx) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2095425B (en) * | 1981-02-25 | 1984-06-27 | Dobson Park Ind | Mine roof support control systems |
-
1973
- 1973-05-22 GB GB2449273A patent/GB1433631A/en not_active Expired
- 1973-05-24 FR FR7319004A patent/FR2185749B3/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2185749B3 (xx) | 1976-05-14 |
GB1433631A (en) | 1976-04-28 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |